RUBBER AND RESIN CONTENT OF NATIVE AND INTRODUCED PLANTS OF CANADA William Harold Minshall Botany and Plant Pathology Division Canada Department of Agriculture Ottawa, Ontario. ALBERT R. MANN LIBRARY New York STATE COLLEGES OF AGRICULTURE AND HoME ECONOMICS AT CORNELL UNIVERSITY Ti Cornell University The original of this book is in the Cornell University Library. There are no known copyright restrictions in the United States on the use of the text. http://www.archive.org/details/cu31924001719156 RUBBER AND RESIN CONTENT OF NATIVE AND INTRODUCED PLANTS OF CANADA (7 William Harold Minshall Botany and Plant Pathology Division Canada Department of Agriculture Ottawa, Ontar io. Cots 323606 INTRODUCTION In 1942 and 1943 the Botany and Plant Pathology Division, Canada Depart- ment of Agriculture, undertook a general survey of native and introduced plants thought to be capable of yielding natural rubber. Wide publicity was responsible for an excellent response to the request for plant material and in 1942 over 1400 samples were collected from all parts of Canada. Species of certain generic groups including Apocynum, Asclepias, and Solidago, es- tablished in plots at Ottawa, provided an additional 400 samples in 1943. The present publication presents the results of analyses of rubber and resin contents of this plant material. MATERIALS AND METHODS On receipt of the plant material it was, where possible, divided into roots, stems, and leaves and if not already in a dry condition it was dried at 65°C in a forced draft oven. To ensure proper identification a specimen prepared from each collection was deposited in the herbarium of the Botany and Plant Pathology Division at Ottawa. The dried samples were ground in a laboratory hammer mill and stored in cardboard containers for analysis. The extraction method of Hall and Goodspeed (2) has frequently been used for the determination of the rubber content of plants. This method involves extraction in two steps: first, with acetone to remove resins, fats, coloring matters etc.; then with benzene to remove the rubber. As a considerable number of materials are soluble in benzene as well as acetone, the reliability of this extraction method depends on the completeness with which the nonrubber benzene-soluble constituents are removed in the first extraction. Hall and Goodspeed (2) used extraction periods of three hours but other workers (1,3,4,5) have used periods of from six to sixteen hours. Longer extraction periods increase the accuracy of the determination but a Be short periods are advantageous in the handling of large numbers of samples. After preliminary investigations a compromise between short and long ex- traction periods was adopted in the present study. All samples were first extracted with acetone for six hours followed by benzene for three hours. Those samples from genera of interest which yielded a benzene extract in excess of 0.5% of dry weight from this preliminary test were analyzed again with extraction periods of 20 hours. The analytical procedures were as fol- lows: In the preliminary analysis two grams of the ground material in a folded filter paper was placed in a Whatman paper thimble and extracted on a Gold- fisch apparatus with acetone for six hours. After air drying for at least 24, hours the material was extracted with benzene for three hours. Acetone extracts were dried at 100°C for three hours and benzene extracts were dried at 100°C for two hours. Moisture determinations were made by drying separate one-gram samples of the plant material in a vacuum oven at 100° for five hours. The acetone and benzene extracts were then calculated on a percentage dry weight basis. In the second long-period analyses the determinations were made in dup- licate. Approximately two grams of the ground material was placed in a mois- ture dish, dried for 16 hours at 70°C in a vacuum oven to remove the residual moisture, weighed, transferred to a folded filter paper, placed in a paper thimble and extracted on the Goldfisch apparatus with acetone for 20 hours. After being dried in air the sample was extracted with benzene for 20 hours. Extract drying times were the same as used in the preliminary analysis. RESULTS Acetone and benzene extracts from the preliminary short-time analyses together with the collection locality, date of collection, and name of collector are given in Table 1. The plant species are listed alphabetically. If more than one collection was made for a species these collections are arranged (a) geographically by provinces from west to east and (b) within each province by date of collection from early season to late. Periodic collections of Apocynum and Asclepias, which were made in the same localities, are grouped together in the table and the collection localities are deleted for all but the first sample. Accession numbers are included with the lo- cality for the material that was established in plots at Ottawa. The great majority of plants analyzed had benzene extracts of less than one percent, indicating that they contained little or no rubber. Among the species with more than two percent were Apocynum androsaemifolium 201%, Asclepias syriaca 2.5%, A. sullivantii 2.1%, Buonymus europaea 3.2%, E. maac- kii 6.1%, and E. yedoensis 2.7%. In addition species of the following genera had benzene extracts between one and two percent: Apocynum, Asclepias, Eucom- mia, Euonymus, Euphorbia, Lonicera, Parthenium, Solidago, and Tanacetum. Rubber apparently is not stored uniformly in the roots and shoots of all plants. In species of Apocynum, Asclepias, Lonicera, and Solidago the leaves had higher benzene extracts than did the stems or roots. In species of Euony- mus, however, the highest benzene extract was in the bark, while in Euphorbia corollata it was in the roots, and in Parthenium argentatum it was in the stems. Analyses of the periodic collections from the same locality of Apocynum androsaemifolium and Asclepias syriaca indicate that the rubber content of the leaves increased with the advancing season. Large acetone extracts were obtained from some of the samples, for exam- ple Lonicera tatarica 47%, Rhus typhina 45%, R. glabra 35%, Loricera ruprech- tiana 39%, L. amoena 35%, Euonymus japonica 34%, Apocynum androsaemifolium 33%, and Betula papyrifera 30%. In addition species of the genera Acer, Arctosta- ae phylos, Asclepias, Baptisia, Campanula, Chrysothamnus, Comptonia, Cotinus, Daucus, Eupatorium, Euphorbia, Grindelia, Solidago, and Tragopogon yielded acetone extracts between 20 and 30%. Table 2 gives a comparison of the acetone and benzene extracts from the short and long extraction procedures. There is little difference between the benzene extract from these two extraction periods with species of Apocy= num, Asclepias, Campanula, Chrysothamnus, Euonymus, Lonicera, and Solidago but plants of the genus Lactuca yielded a much higher benzene extract (1.9- 2.9%) from the 20-hour extraction period than from the 3-hour period (0.6= 0.8%). lLactuca rubber apparently dissolves slowly into benzene. In the acetone extraction procedure the majority of plants yielded a slightly higher extract from the 20-hour period than from the 6-hour period of the preliminary analysis. ACKNOWLEDGMENTS It is a pleasure to acknowledge the assistance of the many people par- ticipating in this project. The collection campaign was organized by Dr. He A. Senn and the success of the program is evident from the many collections received from all parts of Canada. Sincere thanks are extended to the numerous collaborators who collected and forwarded plant material. Technical assis- tance was given by A. Coghlan, L. Hogan, E.M. Lewis, K. Lochheed, D. McIntosh, H. Mitchell, and Dr. A. Skolko. Grinding and extraction of the plant material was carried out in the Chemistry Division, Canada Department of Agriculture. SUMMARY Some 1800 samples representing over 300 species of the native and intro- duced plants collected at numerous stations throughout Canada were analyzed by the extraction method for resin and rubber content. No hitherto unknown iY ae ae species of outstanding value as a rubber plant was discovered in this survey. Genera containing species with a benzene extract (rubber content) in excess of one percent of dry weight were: Apocynum, Asclepias, Eucomia, Euonymus, Euphorbia, Lonicera, Parthenium, and Solidago. In comparison of 3-hour and 20-hour extraction periods with benzene there was little difference in the amount of the extract obtained from plants of Apocynum, Asclepias, Chrysothamnus, Euonymus, Lonicera, or Solidago; but plants of the genus Lactuca yielded much higher extracts (1.9-2.9%) from the 20-hour period than from the 3-hour period (0.6-0.8%). Genera containing species with an acetone extract (resin content) in ex- cess of 20% of dry weight included the following: Acer, Apocynum, Arctostaphy- los, Asclepias, Baptisia, Betula, Campanula, Chrysothamnus, Comptonia, Cotinus, Daucus, Euonymus, Eupatorium, Euphorbia, Grindelia, Lonicera, Rhus, Solidago, and Tragopogon. REFERENCES 1. Buehrer, T.F., and L. Benson. Rubber content of native plants of the south- western desert. Tech. Bull. Univ. Ariz. agric. Exp. Sta. 108: 1-33. 1945. 2. Hall, H.M., and T.H. Goodspeed. A rubber plant survey of western North America. Univ. Calif. Publ. Bot. 7: 159-278. 1919. 3. Polhamus, L.G. Rubber content of various species of goldenrod. J. agric. Res. 47: 149-152. 1933. 4. Spence, D., and M.L. Caldwell. Determination of rubber in rubber-bearing plants. Industr. Engng Chem. (Anal.) 5: 371-5. 1933. 5. Willets, C.0., C.L. Ogg, W.L. Porter, and M.L. Swain. Determination of rubber in fleshy and woody tissue plants. J. Ass. off. agric. Chem. 29: 370-387. 1946. -7- Table 1. benzene for three hours. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Date Lab. Part Acetone Benzen Selentific name Locality collected Collector No. |analyzed | extract, | extrac 3 dry wte +4 dry w Abutilon theophrasti Medic. Marysville, Ont. 23/8/42 | E.G. Anderson 663 | whole 5.6 0.33 661 | leaves 8.5 0.26 662 | steme bel 0.08 Acer platanoides L. Ottawa, Ont. 7/7/42 | HA. Senn, 163 | leaves 22.6 0024 D.C. McIntosh 164 stems 8.6 0.11 Acerates viridiflora (Raf.) Eaton var. Brant Co., Ont. 1/7/42 | WeH. Minshall 154 | shoots 4.2 0.59 lanceolata (Ives) Gray 155 | roots 10.7 0.15 Rondeau Park, Ont. 8/8/42 C.C. Bell 631 | whole 8.2 0.85 Achillea millefolium L. Eastend, Sask. 2/8/42 | H.S. Jones 649 | whole 9.0 0.28 Ottawa, Ont. 29/6/42 D.C. Mcintosh 91 | whole 73 0.21 Adenophora polymorpha Ledeb. Ottawa, Ont. 29/6/42 D.C. McIntosh 100 | shoots 72 0.50 Agoseris glauca (Pursh) Rat. Morden, Man. 25/6/h2 H.H. Marshall 738 | whole 705 0.13 Killarney-Ninga, Man. | 14/7/42 B. Peterson, 304 | whole 6.9 0.29 W. Hagborg Agoseris glauca (Pursh) Rat. var. Craigmyle District, 30/6/42 A.H. Brinkman 195 | whole 114 0.47 scorzoneraefolia (Schrad.) Greene Alta. : Fort Saskatchewan, 7/7/42 G.H. Turner 257 | whole 10.9 0.40 Alta. Pearce, Alta. 10/7/42 J.J. Sexsmith 380 | whole 11.3 0.53 Vonda, Sask. 24/6/42 R.C. Russell, 294 | whole 11.7 0.35 R.J. Ledinghan| Regina, Sask. A/7/h2 L.T. Carmichael | 276 | whole 9.6 0.69 Saskatoon, Sask. 13/7/42 R.C. Russell 536 | whole 10.2 0.35 Birtle, Man. 7/7/42 | MeG. Dudley 401 | whole 12.9 0.38 Agoseris parviflora (Nutt.) Greene Saskatoon, Sask. 27/7/42 R.C. Russell 526 | whole 10.1 0.49 Agoseris turbinata Rydb. Craigmyle Dist., Alta.| 30/6/42 A.H. Brinkman 194 | whole 1065 0.56 Agropyron repens (L.) Beauv. Fort Frances, Ont. 2/8/42 A. Cramg 709 | roots 4.0 On1h Ambrosia elatior L. Ottawa, Ont. 20/8/42 H. Groh 603 | whole 10.1 0.35 Ambrosia trifida L. Ottawa, Ont. 26/6/42 H. Groh 71 | shoots 8.1 Ookk 76 | roots hel 0.29 Anaphalis margaritacea (L.) Gray var. Abbotsford, B.C. 4/8/42 Dom. Ent. Lab. 574, | whole 7.6 0.17 intercedens Hara Ottawa, Ont. 25/6/h2 H. Groh 63 | whole 10.2 0.39 Anethum graveolens L. Ottawa, Ont. ?/11/42 | MN. Zinck 1060 | whole 8.0 0.17 Anthemis cotula L. Carleton Co., Ont. 10/6/42 H.A. Senn, 211 | whole 11.7 0.39 MON. Zinck, D.C. McIntosh Anthemis tinctoria L. Ottawa, Ont. 1/7/h2 | HeA. Senn, 1s | shoots 707 0.33 D.C. McIntosh Apocynum androssemifolium L. Westbank, B.C. 28/6/42 G. Stevenson 233 | whole 16.6 0.45 Salmon Arm, B.C. 27/7/42 C.L. Armitage 487 | whole 17.4 0.61 Agassiz, B.C. 4/8/42 Ent. Lab. 579 | whole 15.9 0.39 Summerland, B.C. 3/8/42 G.E. Woolliams 596 | leaves 17.1 0.50 31/8/42 G.E. Woolliams 828 | whole 13h 0.61 Salmon Arm, B.C. 9/9/h2 | C.L. Armitage 822 | whole 18.9 1.18 24/9 /h2 C.L. Armitage 916 | whole 13.3 0.89 -8- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Seientific name Locality Lcitestal Collector ai Parsi) papas paaeered % dry wt.| % dry wt. Apocynum androsaemifolium L. - Continued 24/9/42 C.L. Armitage 918 | leaves 21.5 2.09 919 | stems & 79 0.13 pods 917 | roots 7.6 0.11 Ft. Saskatchewan, Alta.| 1/7/42 | G-H. Turner 225 | whole 1.7 0.33 Saskatoon, Sask. 8/7/42 | RC. Russell 529 | leaves 15.4 0.20 S. Saskatoon, Sask. 13/7/h2 | RC. Russell 534 | shoots 11s 0.22 Edmonton, Alta. 13/7/42 | E.H. Moss 314 | shoots 16.4 0.50 Saskatoon, Sask. 25/7/h2 R.C. Russell 528 | whole 15.7 049 8. Saskatoon, Sask. 25/7/42 | R.C. Russell 531 | shoots 4.6 0.27 Saskatoon, Sask. 7/8/42 R.C. Russell 684 | whole 12.6 0.27 Saskatoon, Sask. 7/8/42 | RC. Russell 680 | whole 16.8 0.39 Saskatoon, Sask. 25/8/h2 | RC. Russell 869 | whole 12.7 0.39 Saskatoon, Sask. 25/8/42 R.C. Russell 871 | whole 12.2 0.37 Morden, Man. 21/6/42 H.H. Marshall 734 | whole 15.1 0.26 Birtle, Man. 7/7/42 M.G. Dudley 404 | whole 11.4 0.40 Muskoka, Ont. 28/6/42 | W.-H. Minshall 108 | shoots 16.6 0.29 Beamsville, Ont. 4/7/42 F. Ransom 586 | whole 18.8 0.34 Ipperwash Camp, Ont. | 14/8/42 | He Millar 606 | shoots 1667 0.57 Brant Co., Mt. 28/6/42 R.F. Cain 900 | leaves 28.8 0.69 12/7/42 | RF. Cain 909 | leaves 33.3 0.94 908 | stems 10.8 0025 : 26/8/h2 | R.P. Cain 1483 | leaves | 32.3 1.61 ’ 1484 | stems 12.7 0.21 Se 10/9/42 | R-F. Cain 1488 | leaves | 30.3 1.67 1489 | stems 10.2 0.28 Brant Co., Ont. 20/9/42 | RF. Cain 1493 | leaves 28.1 0.52 1494 | stems 8.9 O.2h 1495 | roots 9.5 0.16 20/9/42 | R-F. Cain 1496 | leaves 2hel 0.86 1497 | stems 8.9 0.20 1498 | pods 09 0.91 Ottawa, Ont. 3/6/42 H. Groh 1 | leaves 1.3 0.06 1A] stems 9.8 0.30 11/6/42 | H. Groh 19 | leaves 17.8 0.20 19A| stems 767 0.20 21 | roots 7.0 0.10 25/6/k2 H. Groh, 64 | leaves 20.3 0.40 E.G. Anderson 644} stems 12.9 0.15 15/7/42 H. Groh, 265 | leaves 17.6 0.80 E.G. Anderson 265A| stems 10.9 0.30 = Gi. Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name Locality sda Collector tae Pale pasen ee % dry wt.|/% dry wt. 266 | roots 642 0.20 27/7/h2 H. Groh 397 | stems 12.3 0.20 396 | leaves 21.3 0.80 11/8/42 | He Groh 550 | shoots 23.5 0.90 552 | leaves heb 1.20 551 | stems 10.0 0.40 26/8/42 H. Groh 664 | leaves 2he7 0.80 665 | stems Lied 0.30 11/9/42 H. Groh 802 | whole 2342 1.10 11/9/42 He Greh 800 | leaves 23.7 1.10 25/9/h2 | He Groh 894 | leaves 2h03 1.08 893 | stems 602 0.21 Ottawa, Ont.(42-414-32) 27/8/43 M.N. Zinck 1821 | leaves 16.6 0.82 Ottawa, Ont.(42-41l4-11) 4/9/43 M.N. Zinck 1832 | leaves 28.0 0.41 . Ottawa, Ont.(43=-479-1) | 8/9/43 M.N. Zinck 1843 | leaves 2he5 O46 Ottawa, Ont.(43-489-1) | 8/9/43 | M.N. Zinck 1840 | leaves 19.0 0.58 Ottawa, Ont.(42-414-11) 30/9/42 | M.N. Zinck 935 | leaves 17.4 0.49 934 | stems 8.8 O14 Brebeuf, Que. 3/8/42 L. Coupal 462 | whole 15.1 0.50 Everett, N.B. 27/6/42 | MsEs Moore, 864 | whole 549 0.21 S.F. Clarkson, J.L. Howatt Fredericton, N.B. 21/7/42 J.L. Howatt, 858 | whole 11.6 0.18 S.F. Clarkson Waterville, N.S. 26/7/42 E. Buchanan 456 | whole 15.9 0.40 Highbury, N.3. 16/6/42 | R.M. Lewis 82 | roots 9.0 0.05 Kentville, N.S. 17/6/42 R.M. Lewis 79 | leaves 12.7 0.30 79A| stems Tel 0.20 Highbury, N.S. 3/7/42 R.M. Lewis 239 | leaves 15.9 0.30 239A| stems 703 0.30 Kentville, N.S. 3/7/42 R.M. Lewis 240 | leaves 17.0 0.40 240A | stems 7Te7 0.40 Highbury, N.S. 17/7/42 R.M. Lewis 622 | leaves 18.9 0.30 Kentville, N.S. 17/7/42 R.M. Lewis 615 | leaves 17.6 0.30 Highbury, N.S. 31/7/42 | RM. Lewis 617 | leaves 14.3 0.20 Kentville, N.S. 31/7/h2 R.M. Lewis 619 | leaves 18.9 0.20 14/8/42 | RM. Lewis 694 | leaves 27.5 0.20 Highbury, N.S. 14/8/42 | RM. Lewis 693 | leaves 19.1 0.30 28/8/42 R.M. Lewis 813 | leaves 20.1 0.40 Kentville, N.S. 28/8/42 R.M. Lewis 812 | leaves 24.0 0.40 Highbury, N.S. 11/9/42 | RM. Lewis 1329 | whole 10.0 0.23 Kentville, N.S. 11/9/42 | RM. Lewis 1327 | whole 14.7 0.21 -10- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours = Continued. Date Lab. Part Acetone Benzene Scientific name Locality collected Collector No. | analyzed otis Pgh Apocynum androsaemifolium L. - Continued Highbury, N.S. 25/9/42 RM. Lewis 1338 | whole 11.8 0.19 Kentville, N.S. 25/9/42 | RM. Lewis 1337 | whole 14.9 0.21 Highbury, N.S. 9/10/42 | RM. Lewis 1336 | whole 4.9 02h Kentville, N.S. 9/10/h2 | R.M. Lewis 1331 | whole 15.8 0.28 Highbury, N.S. 23/10/42 | R.M. Lewis 1349 | whole 709 0.21 Apocynum androsaemifolium L. var. glabrum Pemberton, B.C. 20/6/42 | J. Ronayne 457 | whole 19.1 0.27 ig Ottawa, Ont.(42—-41-54) | 30/9/42 | MN. Zinck 937 | leaves 15.4 0.33 936 | stems 9.8 0.10 Ottawa, Ont. (42-41-54) | 27/8/h3 | M.N. Zinck 1813 | leaves 28.9 0.38 Apocynum cannabinum L. Hamilton, Ont. 30/8/43 C.M. Haist 1825 | leaves 19.3 0.67 Preston, Ont. 2/9/42 | He Groh 775 | whole 12.2 1.13 - Ottawa, Ont.(43=5-4) 8/9/43 | MeN. Zinck 1838 | leaves 19.0 0.19 Crediton, Ont. 2/9/h2 | L.0. Gaiser 796 | whole 15.8 0.59 Apocynum cannabinum L. var. glaberrimum A. DC, Rondeau Prov. Park, ont, 13/7/42 | C. Bell 488 | whole 15.3 0.40 Blenheim, Ont. 6/8/42 H. Millar 609 | shoots 15.9 0.35 Ottawa, Ont. 13/8/42 H. Groh 555 | whole 15.6 0.66 Apocynum medium Greene Vancouver, B.C. 26/6/42 J. Davidson 175 | whole 194 0.25 26/6/h2 | J. Davidson 173 | shoots 11.5 0.37 174 | roots 15.5 0.35 Salmon Arm, 3.C. 8/7/42 C.S. Armitage 267 | whole 19.0 0.51 Edmonton, Alta. A/7/k2 E.H. Moss 313 | shoots 14.2 0-40 Saskatoon, Sask. 23/6/h2 R.C. Russell 290 | leaves 12.6 0.30 290A| stems 8.9 0.40 290B] roots 8.0 0.30 Clifton, N.B. 15/6/42 A.J. Wetmore 3k | shoots 12.4 Ok9 37 | leaves 15.7 046 36 | stems 8.8 O48 35 | roots 96 0.33 King's Co., N.B. 2/6/42 | WeM. Kesson 139 | whole 12.9 0.56 Apocynum medium Greene var. leuconeuron Dunrobin, Ont. 25/7/42 | H.N. Racicot 377 | whole 17.2 0.64 (Greene) Woodson Apocynum sibiricum Jacq. Saskatoon, Sask. 8/7/h2 R.C. Russell 532 | whole 13.2 0.38 25/7/42 R.C. Russell 530 | whole 12.6 0.23 7/8/42 R.C. Russell 683 | shoots 1A4e7 0.30 25/8/42 R.C. Russell 870 | whole 16.2 0.34 18/9/42 R.C. Russell 1317 | whole 13.2 0.23 Morden, Man. 18/8/42 H.H. Marshall 758 | whole Wy.7 O42 Britannia Bay, Ont. 28/7/42 H.-A. Senn, 417 | whole 16.9 0.91 M.N. Zinck 419 | leaves 22.1 1.35 418 | stems 12.1 0.24 Shirley Bay, Ont. 7/8/42 | He Groh 513 | shoots 2004 1.31 -l- Table 1. benzene for three hours - Continued. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Sclentific name locality Geanecesd Collector z eae peeraee) pod dry wt. |% dry wt. Kent Co., nt. 15/8/42 | C.C. Bell 632 | shoots 12.3 0.46 Ottawa, Ont. 25/8/42 H. Groh, 678 | whole 18.2 0.89 W.H. Minshall Ottawa, Ont .(42-478-5) | 27/8/43 | MN. Zinck 1817 | leaves 16.3 0.32 Ottawa, Ont.(43-10-30)| 8/9/43 | M.N. Zinck 1835 | leaves 17.9 0.32 Britannia Bay, Ont. 8/9/43 M.N. Zinck 1844 | leaves 2004 0.85 Ottawa, Ont.(43-5-3) 8/9/43 | MeN. Zinck 1842 | leaves 21.3 0.53: Ottawa, Ont.(43-489-2)| 8/9/43 | MeN. Zinck 1841 | leaves 1904 0.54 Val Tetreau, Que. 26/6/42 | H. Groh 75 | whole 17.1 0.69 Apocynum sibiricum Jacq. var. cordigerum Morden, Man. 25/6/42 | HH. Marshall 742 | leaves 91 0.25 (Greene) Fern. 741 | stems 6.1 0.10 Brebeuf, Que. 17/7/42 L. Coupal 300 | shoots 13.1 0055 301 | roots 10.8 0.31 Apocynum eibiricum Jacq. var. salignum Westbank, B.C. 3/7/h2 | G. Stevenson 509 | shoots 12.6 0.71 (Greene) Fern. Saskatoon, Sask. 23/6/42 R.C. Russell 291 | whole 4.5 0034 Ft. Saskatchewan, Altad 29/6/42 G.H. Turner 224 | whole 12.3 0-40 Ft. Saskatchewan, Alta/ 29/6/42 | GH. Turner 227 | whole 13.3 O41 Katepua Beach, Sask. 1/7/42 | LeT. Carmichael | 275 | whole 17.2 0.38 Arctostaphylos uva-ursi (L.) Spreng. Carleton Co., Ont. 10/7/42 Bere ag " 215 | whole 26.7 0.36 D.C. McIntosh Arenaria peploides L. Grave's Ial., N.S. 16/7/h2 | M.N. Zinck 367 | whole 6.7 0.09 Arnica chamissonis Less. Ottawa, Ont. 29/6/42 D.C. McIntosh 107 | shoots 93 0.58 Artemisia abrotanum L, Ottawa, Ont. 10/7/h2 | HA. Senn 208 | stems 702 0.04 207 | leaves 19.2 0.66 Artemisia absinthium L. Ottawa, Ont. 5/8/42 H.A. Senn 477 | whole 10.2 0.28 Artemisia vulgaris L. Ottawa, Ont. 2/7/42 | MeN. Zinek 150 | whole 8.5. 0.34 Britannia Bay, Ont. 29/7/h2 a ee 426 | shoots 962 0.60 Asclepias curassavica L. Ottawa, Ont.(40-102-59) 16/4/43 | M.N. Zinek 1518 | shoots 8.0 0.15 Ottawa, Ont.(40-94-9) | 1/10/42 | MN. Zinck 944, | leaves 11.3 0.42 943 | stems 8.0 0.19 Ottawa, Ont.(40-420-2)| 1/10/42 | M.N. Zinck 948 | leaves 11.4 0.41 947 | stems & 8.1 002k flowers Ottawa, Ont.(40-64-7) | 1/10/42 | M.N. Zinck 946 | leaves 11.7 0.27 945 | stems & 8.3 0.15 flowers Ottawa, Ont. 15/10/42 | M.N. Zinck 1347 | pods 11.5 0.22 Asclepias incarnata L. Brant Coe, Ont. 25/6/42 | R.F. Cain 899 | leaves 19.5 0.68 898 | stems 11.4 043 9/7/42 R.F. Cain 903 | leaves 21.1 1.10 90, | stems 17.1 0.37 27/7/42 R.F. Cain 913 | leaves 23 04 1.32 -lge Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name locality ene es Collector i ne eat Asclepias incarnata L. - Continued 912 | stems 20/9/42 | RF. Cain 1502 | leaves 1503 | stems 1504 | pods Preston, Ont. 3/)/h2 | He Groh 781 | whole 782 | leaves 78, | stems 785 | roots ; 783 | pods ar Prov. Park, 27/7/42 Cc. Bell 489 | whole Picton, Ont. 25/8/42 G. Anderson 659 | shoots Carleton Co., Ont. 12/8/43 wee patel 1673A| leaves 1673B} stems 29/7/42 H.A. Senn, 416 | shoots M.N. Zinck Shirley Bay, Ont. 7/8/b2 He Groh on 515 | shoots Carleton Co., Ont. 10/7/h2 | H.A.. Senn, 212 | shoots M.N. Zinck, D.C. McIntosh Ottawa, Ont.(42-414-16) 7/7/42 | HeA. Senn 192 | whole Ottawa, Ont.(41-41-9) | 16/8/43 | M.N. Zinck 1726 | leaves Ottawa, Ont .(42-414-33} 18/8/43 M.N. Zinck 1727 | leaves Ottawa, Ont .(42-9-96) | 19/8/43 | M.N. Zinck 1741 | leaves Ottawa, Ont.(42-9-96) | 19/8/43 | M.N. Zinck 1752 | leaves Ottawa, Ont.(42-9-100) | 19/8/43 M.N. Zinck 1740 | leaves Ottawa, Ont.(41-42-9) | 19/8/43 | MeN. Zinck 1737 | leaves Ottawa, Ont.(42-9-97) | 19/8/43 | MN. Zinck 1732 | leaves Ottawa, Ont.(41-31-125} 19/8/43 | MN. Zinck 1736 | leaves Ottawa, Ont. (42-41-55) | 19/8/43 | M.Ne Zinck 1735 | leaves Ottawa, Onte(42=-414-16) 20/8/43 | M.N. Zinck 1756 | leaves Ottawa, Ont.(42—-414-28) 20/8/43 | M.N. Zinck 1757 | leaves Ottawa, Ont.(39-109-1) | 21/8/43 | MN. Zinck 1768 | leaves Ottawa, Ont.(X-162-1-1) 23/8/43 | M.N. Zinck 1779 | leaves Ottawa, Ont.(X-2-814) | 23/8/43 | MN. Zinck 1781 | leaves Ottawa, Ont.(42-414-34) 23/8/43 | MN» Zinck 1782 | leaves Ottawa, Ont.(42-414- | 23/8/43 | M.N. Zinck 1783 | leaves 112-1) Ottawa, ca 23/8/43 | MeN. Zinck 1780 | leaves Ottawa, Ont. (41-41-9-2) 25/9/43 | MN. Zinck 1900 | leaves Ottawa, Ont.(41-41-9) | 30/9/42 | M.N. Zinck 927 | leaves 926 | stems Acetons extract, 16.1 16.9 78 16.6 10.7 18.4 11.3 78 18.6 15.9 18.4 16.7 11.6 16.1 19.4 204 18.4 17-4 17.8 20.9 17.8 17.8 17.6 18.8 22.7 17.3 26.0 18.2 8.7 19.2 16.6 19.9 13.7 17.7 17.6 16.0 8.1 Benzene extract, 0.39 1.82 0.18 0.09 0040 1.30 0.27 0.19 0022 0.39 0.57 0.96 0.20 0.53 0.60 0.59 0.62 1.20 0.61 0.88 0075 0.64 1.80 1.20 1.10 1.20 0.59 0.67 0.77 1.60 0.95 0.71 1.10 1.40 0.70 0.98 0.13 s13:6. Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name Locality poate ed Collector = ial anc, fone, Ottawa, Ont .(42-414-16) 30/9/42 | MeN. Zinck 929 | leaves 18.2 0.79 928 | stems 8.9 0.08 Ottawa, Ont.(42=478-2)! 30/9/42 | M.N. Zinck 925 | leaves 18.4 0.69 924, | stems 11.2 0.13 Ottawa, Ont.(42-414-28) 30/9/42 | MN. Zinck 931 | leaves 17.0 0.95 930 | stems Fok 0.11 Ottawa, Ont.(42-41-55)| 5/10/42 | M.N. Zinck 963 | leaves 16.5 0.76 962 | stems 905 O14 Ottawa, Ont. 5/10/42 | M.N. Zinck 974 | leaves 14.9 1.78 973 | stems 8.0 0.13 Ottawa, Ont.(39-78-8-1] 5/10/42 | M.N. Zinck 976 | leaves 17.7 0.86 975 | stems 8.1 0.10 Ottawa, Ont.(41-31-125)] 5/10/42 | M.N. Zinck 972 | leaves 17.1 0.71 971 | stems 8.5 0.16 Ottawa, Ont.(X-2-814) | 6/10/42 | M.N. Zinck 98h | leaves 17.1 0.97 983 | stems 7.7 0.18 Ottawa, Ont.(42-9-97) 6/10/42 | MoM, Zinck 1006 | leaves 16.6 047 1005 | stens 10.1 0.19 Ottawa, Ont.(X-162-1-1] 6/10/42 | M.N. Zinek 982 | leaves 18.0 1.10 981 | stems 8.0 0.12 Ottawa, Ont.(42-17-2) | 6/10/42 | M.N. Zinck 1004 | leaves 16.9 0.69 1003 | stems 10.0 0.22 Ottawa, Ont. 7/10/42 | MeN. Zinck 1341 | pods 8.7 0.16 Lascelles, Que. 9/7/42 H. Groh 201 | leaves &} 23.0 0.89 flowers 202 | stems & | 19.3 0.26 roots Asclepias incarnata L. forma albiflora Heller | Ottawa, Ont .(42-17-2) | 19/8/43 M.N. Zinck 1750 | leaves 22.2 1.20 Ottawa, Ont.(42-17-3) | 19/8/43 | M.N. Zinok 1746 | leaves 17.9 1.40 Ottawa, Ont.(41-88-2) | 20/8/43 | M.N- Zinck 1763 | leaves 16.8 0.75 Ottawa, Rake? 25/9/h3 M.N. Zinck 1901 | leaves 18.9 0.54 Ottawa, Ont.(41-88-2) | 30/9/42 | M.N. Zinck 921 | leaves 17.7 0.77 920 | stems 73 0.06 Ottawa, Ont.(42-9-96) | 5/10/42 | M.N. Zinck 970 | leaves 15.7 0.66 969 | stems 8.4 0.09 Ottawa, Onte(42-17=3) | 6/10/42 | M.N. Zinck 1008 | leaves 16.3 0.87 1007 | stems 8.8 0.21 Asclepias incarnata L. var. pulchra (Ehrh) Ottawa, Ont.(42—474-14)} 19/8/43 | MN. Zinck 1749 | leaves 13.2 1.70 iii Ottawa, Ont. (X-2-812-2) 16/9/43 | M.N. zinek 1886A| leaves | 13.4 0.35 1686B| stems 2.2 Ob Ottawa, Ont.(41-88-2) | 30/9/42 M.N. Zinck 923 | leaves 16.0 0.75 a 18% Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and bensene for three hours - Continued. followed by extraction with Date Lab. Bayt Acetone | Benzene Scientific name Locality eellested amie Pa aantyesd Sraee ven we Asclepias incarnata L. var. pulchra (Ehrh) 922 | stems 8.7 0.05 preteen: Ottawa, Ont.(X-2-812) | 5/10/42 |M.N. Zinck ian emis nay as 977 | stems 104 0.13 Asclepias ovalifolia Dec. Ft. Saskatchewan, Alta, 27/6/42 |G.H. Turner 223 | whole 14.0 0.64 Lake Lenore, Sask. 24/6/42 | RC. Russell 296 |whole 12.2 0.20 Morden, Man. 25/6/42 | HeH. Marshall 7h0 | leaves 9.0 0.29 25/6/h2 |H. He Marshall 739 | whole 907 0.28 Asclepias phytolaccoides Pursh Rondeau Park, Ont. 10/9/42 |C.C. Bell 844, | whole 12.8 0.35 Ottawa, Ont.(40-50-24)| 6/10/42 |M.N. Zinck 996 | shoots 10.7 1.33 Asclepias speciosa Torr. Summerland, B.C. 15/6/42 |G.E. Woolliams 134 | leaves 8.9 0.50 134A] stems 8.8 0.50 Vancouver, B.C. 26/6/42 | J. Davidson 172 | shoots 10.0 0.56 171 | roots 19.6 0.30 Summerland, B.C. 30/6/42 |G.E. Woolliams 235 | stems 768 0.20 234 | leaves, 10.9 0.60 flowers Westbank, B.C. 3/7/42 |G. Stevenson 508 | whole 9.5 0.63 Summerland, B.C. 13/7/42 |G-E. Woolliams 469A| leaves 8.7 1.20 3/8/42 |G.E. Woolliams 595 |whole 10.3 0.95 17/8/42 |G.E. Woolliams 728 | whole 11.0 0.91 31/8/42 |G.E. Woolliams 829 |whole 10.4 0.63 Lethbridge, Alta. 10/7/42 |J.J. Sexsmith 378 | whole 11.0 0.53 Eastend, Sask, 2/7/42 |HeS. Jones 287 |whole 13.7 0.48 2/8/42 |HeS. Jones 718 |whole 10.2 0055 Frontier, Sask. ?/8/4h2 |LW. Bird 816 | shoots 10.0 0.87 817 | roots 902 0.22 12/8/h2 aes 868 | whole 12.2 0.39 Morden, Man. 26/6/42 |H.H. Marshall 745 |whole 9.0 0.24 Gladstone, Man. 17/6/42 |W.A.F. Hagborg, | 370 |whole 9.7 0.33 B. Peturson Brandon, Man. 2/7/43 |W.B. Patterson 1603A| leaves 96 0.73 16038] stems 8.4 0.35 Brandon, Man. 13/8/43 G.I. Todd 1725A| leaves 8.5 0.79 1725B| stems 11.0 0.22 Ottawa, Ont.(41-10-11) | 19/8/43 |M.N. Zinck 1748 |leaves 8.3 0.73 Ottawa, Ont.(42-10-2) | 19/8/43 oN. Zinck 1745 |leaves 966 1.30 Ottawa, Ont .(39-10-33) | 24/8/43 |M.N. Zinck 1802 | leaves 9.0 0.72 Ottawa, Ont.(41-10-11) | 5/10/42 |M.N. Zinck 965 |leaves 10.5 0.79 964, | stems 10.4 0.24 Ottawa, Ont.(42-10-2) | 6/10/42 |M.N. Zinck 988 jleaves 9.6 0.66 987 |stems 91 0.22 Pe Le Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours benzene for three hours - Continued. and followed by extraction with Scientific name Locality Ps ae Collector ati Peat poe ned % dry wt. | % dry whe Asclepias Sullivantii Ingelm. Walpole Island, Ont. 10/8/43 8. Fox 1635A| leaves 8.5 2.10 1635B] stems 607 0.30 Asclepias syriaca L. Starback, Man. 23/8/42 | A. Simpson 733 | shoots 10.5 0.64 Morden, Man. 16/9/43 | Exp. Stae, 1889 | leaves 12.0 0.90 Morden 16/9/43 | Morden Exp. Sta.| 1890 | leaves 13.1 0.71 Brant Co., Ont. 25/6/42 | B.F. Cain 896 | leaves 14.0 0.96 897 | stems 12.2 0.39 4/7/42 R.F. Cain 1499 | leaves 15-5 0.96 1500 | stems U4 Oo2k 1501 | flowers 16.0 Ok7 h/7/b2 | RF. Cain 1505 | leaves | 11.1 0.66 1506 | stems 13.1 0029 1507 | flowers 13 4 0.60 4/7/h2 RF. Cain 1506 | leaves 12.8 2034 1509 | stems 11.3 0.23 1510 | pods 15.9 002k 4/7/h2 | RF. Cain 902 | leaves 16.1 1.30 901 | stems 16.4 0.40 9/7/42 | RF. Cain 907 | leaves Wl 1.37 906 | stems lyk O41 905 | flowers | 16.5 0.81 23/7/42 | B.F. Cain 911 | leaves | 13.7 1.75 910 | stems 48 O45 27/7/42 R.F. Cain 913 | leaves 2323 1.32 6/8/42 R.F. Cain 915 | leaves 14.5 2.10 91, | stems 13.5 O45 16/8/42 R.F. Cain 1478 | leaves Wed 2.20 1479 | stems 15.0 0.22 20/8/42 R.F. Cain 1480 | leaves 10.5 1.77 1481 | stems RA 0.19 1482 | pods 17.3 0.38 3/9/42 | RF. Cain U485 | leaves 1.4 1.71 1486 | stems 12.9 0.27 1487 | pods 14.1 0.32 20/9/42 R.F. Cain 1490 | leaves 11.7 1.90 1491 | stems 92 0.30 1492 | pods 16.1 0.63 | Ottawa, Ont. 3/6/42 H. Groh 2A, stems 8.9 0.40 2B, leaves 907 0.40 Peterborough, Ont. 3/6/43 F.C. Paterson 1545 | leaves 99 0.22 1546 | stems 10.7 0.57 -16- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name Locality sonetos Collector a Picci 7 cane, Asclepias syriaca L. - Continued Haliburton, Ont. 10/6/43 G. Anderson 1547 | leaves 10.2 Obk Farran's Point, Ont. 10/6/43 | O. Beckstead 1549 | leaves 909 0.34 Haliburton, Ont. 10/6/43 | G. Anderson 1548 | stems 926 O.h9 Laurentian View, Ont. | 11/6/42 H. Groh 22A| stems 12.5 0.30 23 | roots 17.6 0.06 Bobcaygeon, Ont. 15/6/43 | We Fulton 1553 | leaves 10.3 0.54 Glenarm, Ont. 15/6/43 D.P. McKenzie 1556 | stems nu.5 O46 Finch, Ont. 15/6/43 | WoJ. Dingwall |1557A| leaves 9.8 0.40 1557B| stems 1.9 0.56 Cayuga, Ont. 15/6/43 Dept. of Agric. |1558A| leaves 10.4 0.41 1558B| stems 11.7 0.47 Ottawa, Ont. 20/6/h2 T. Adams 40 | whole 9 0075 Ottawa, Ont. 25/6/h2 H. Groh, 65 | leaves 11.5 0.50 E.G. Anderson 65A| stems 20.1 0.40 66 | roots 14.8 0210 Milford Bay, Ont. 28/6/42 | WH. Minshall 109 | whole 13.3 0.62 Ottawa, Ont. 29/6/42 H. Groh 84 | leaves 4.7 0.60 84A| stems 13.3 0.30 85 | roots 10.0 0.20 Walkerton, Ont. 2/6/43 G.R. Gear 1561 | whole 11.5 0.76 Brant Co., Ont. 1/7/42 | W.H. Minshall 156 | shoots 13.2 0.88 Lambton Co., Ont. 5/7 /k2 L.O. Gaiser 435 | whole 13.8 0.55 5/7/42 | L.O. Gaiser 436 | whole 12.1 0.52 Lincoln Co., Ont. T/7(h2 F. Ransom 591 | shoots 13.2 O45 Fallowfield Sta., Ont. | 9/7/43 | S. Martin 1598 | leaves neg 0.60 9/7/43 S. Martin 1600 | leaves 906 O71 Carleton Co., Ont. 10/7/42 H.A. Senn, 209 | leaves & 15.7 1.19 M.N. Zinck, flowers D.C. McIntosh 210 | stems 20.0 0.58 Pallowfield Sta., Ont. | 12/7/43 S. Martin 1589 | leaves 11.0 0.87 12/7/43 S. Martin 1590 | leaves 11.9 0.92 Morpeth, Ont. 13/7/42 | C.C. Bell 491 | whole 12.5 0.67 Ottawa, Ont. 15/7/h2 H. Groh, 263 | leaves 13.0 0.90 G. Anderson 263A| stems 16.3 0.40 264 | roots 8.2 0.30 Ottawa, Ont. 19/7/43 | S. Martin 1572B| stems 17.0 0.55 27/7/42 | He Groh 394 | stems 24.3 0.30 394A} roots neg 0.20 395 | pods 26.9 0.50 Simcoe Co., Ont. 2/7/43 | SeLe Page 1567A| leaves 10.3 1.20 1567B| stems 13.1 Ok2 -17- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours ~ Continued. Acetone | Benzene Scientific name Locality Fe ects Collector = eatee ge , Frege, Simcoe Co., Ont. 2/7/43 S.L. Page 1568A| leaves 10.2 0.91 1568B] stems 12.6 0.35 2/1/h3 S.L. Page 1569A| leaves 12.8 0.41 1569B| stems 905 0.32 Ashton, Ont. 10/8/42 | F.R. Gourlay 566 | shoots 15.3 1.81 Ottawa, Ont. 11/8/42 H. Groh 545 | leaves 22.3 1.90 Ottawa, Ont.(42=7-1) | 22/7/43 | M.D. Sutton 1586B| stems 1406 0.50 1586A| leaves We5 1.28 5/8/43 MLN. Zinck 1606A| leaves lls 1.53 1606B] stems 12.8 0.29 11/8/43 | M.N. Zinek 1651A| leaves 13.1 1.14 16513] stems 16.7 0.32 18/8/43 MLN. Zinck 1729A| leaves 15.2 1.49 1729B| stems 18.5 0.32 Ottawa, Ont.(42-414~7) |19/8/h3 | M.N. Zinck 1744 | leaves 12.3 0.98 Ottawa, Ont.(42-414-6) | 19/8/43 | MN. Zinck 1733 | leaves 10.7 1.10 Ottawa, Ont.(41-17-7) |19/8/43 | MN. Zinck 1738 | leaves U1 0.96 Ottawa, Ont.(41-31-15) |19/8/43 | M.N. Zinck 1742 | leaves 10.6 0.54 Ottawa, Ont .(42-7-1) 20/8/43 | MN. Zinck 1759 | leaves 4.5 1.18 Ottawa, Ont.(42-497-7) | 20/8/43 | M.Ne Zinck 1762 | leaves 12.7 0.84 Ottawa, Ont.(42-414-12)| 20/8/43 | M.N. Zinck 1758 | leaves 12.9 1.50 Ottawa, Ont. (X-2-813-2)/ 21/8/43 M.N. Zinck 1771 | leaves 12.4 0.89 Ottawa, Ont.(42=-414-14)| 21/8/43 | M-N. Zinck 1772 | leaves 8.8 0.76 Ottawa, aeeacade oe 21/8/43 M.N. Zinck 1774 | leaves 10.0 0.61 Ottawa, Ont.(42-414-15)| 21/8/43 | M.N. Zinck 1769 | leaves 8.5 0.71 Ottawa, Ont.(40-420-12)/21/8/43 | MN. Zinck 1773 | leaves 703 0.78 Ottawa, Ont.(39-456-6) [21/8/43 | MN. Zinck 1777 | leaves 12.4 1.40 Ottawa, Ont.(40-17-7-1)|21/8/43 | M.N. Zinck 11775 | leaves 10.8 1.40 Ottawa, Ont.(X-2-813) [21/8/43 | M.Ne Zinck 1770 | leaves 11.6 1.20 Ottawa, Ont.(42-7-1) (27/8/43 | MeN. Zinck 1822A | leaves 15.0 1.43 18228 | stems 17.0 0.28 2/9/43 M.N. Zinck 11829A | leaves 14.2 1.43 1.8298 | stems 17.1 0.32 Ottawa, Ont. 4/9/42 H.L. Mitchell 761 | stems 13.4 0.48 762 | pods 2004 005k 763 | leaves 1.9 1.90 Ottawa, Ont.(42-7-1) 9/9/43 | MON. Zinck 1.@46A | leaves 15.2 1.58 L&46B | stems wel 0.37 Ottawa, Ont.(43-479-2) | 9/9/h43 | MeN. Zinck 634 | leaves 13.2 0.85 Ottawa, Ont.(43-41i-2) |20/9/43 | MN. Zinck ness | leaves 17.8 1.40 -18< Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. : Scientific name Locality 6 cree Collector ee Pr is ed cane, et , Asclepias syriaca L. - Continued Ottawa, Onte(A2—41h- | 21/9/43 | MeN. Zinck 1895A| leaves 16.0 0.58 a 16958| stems 15.1 | 0.34 Ottawa, Ont.(42-7-1) | 22/9/43 | MeN. Zinck 1896A| leaves Uye1 1.36 1896B; stems 8.9 0.29 Ottawa, Onte(42=7-1) | 29/9/43 | MeN. Zinck 1906A| leaves 10.9 1.18 1906B} stems 66 0.29 Ottawa, Ont.(42-414-12) 30/9/42 | MN. Zinck 933 | leaves 1.8 1.99 932 | steas Toh 0.21 Ottawa, Ont.(42-7=1) 1/10/42 | M.N. Zinok 942 | leaves 1.9 0.7% 941 | stems 10.0 0.19 Ottawa, Ont.(42-7-1) 2/10/43 | MeN. Zinck 1910 | leaves 8.4 0.80 Ottawa, a amar 2/10/43 | MN. Zinck 1911 | leaves 10.3 0.91 Ottawa, Ont.(X-2-813) 5/10/43 | MN. Zinck 957 | leaves 1.7 0.93 956 | stems 10.6 0.19 Ottawa, Ont.(40-17-7) 5/10/43 | MN. Zinck 959 | leaves 12.6 1.12 958 | stems 8.5 0.20 Ottawa, Ont .(39=456=6) | 5/10/43 | MeN. Zinck 961 | leaves 12.5 1.06 960 | stems 76 002k Ottawa, Ont.(42—414-6) | 6/10/42 | M.N. Zinck 1002 | leaves 19 0.56 1001 | stems 12.2 0.27 Ottawa, Ont.(42-7-1) 7/10/43 | M.N. Zinck 1919 | leaves 8.5 0.95 Ottawa, Ont. 11/8/42 H. Groh 546 | stems al 0.30 547 | pods hel 0.40 Carleton Co., Ont. 12/8/43 W.He Minshall, /1653 | leaves 18.2 0.89 S. Martin 1654 | leaves 12.3 1.90 Ottawa, Ont. 13/8/43 | MN. Zinok 1702 | leaves 12.6 1.50 Ottawa, Ont. 26/8/42 | He Groh 668 | leaves 15.8 1.60 669 | stems 18.7 0.40 Richmond, Ont. 30/8/43 MN. Zinck 1826A| leaves 17.0 2040 1826B| stems 13.5 0.36 Preston, Ont. 2/9/h2 H. Groh 776 | whole 13.1 1.01 Ottawa, Ont. 3/9/63 | He Groh 1899 | leaves 9.6 2.30 Ottawa, Ont. 11/9/42 | He Groh 803 | leaves 13.7 230 80, | stems 1.5 0.20 Kitchener, Ont. 16/9/42 F.H. Montgomery | 1052 | shoots 11.5 Ookk 1053 | roots 76 0.11 Ottawa, Ont. 27/9/43 M.N. Zinck 1905A| leaves 12.4 0.51 1905B| stems 12.9 0025 Ottawa, Ont. 29/9/b3 M.N. Zinck 1908 | leaves n.6 0.69 Crediton, Ont. 7/9/42 L.O. Gaiser 823 | whole 12.8 0.36 = 19) Table 1, benzene for three hours - Continued. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Seientific name Locality ditec ol Collector rg ine ee seen % dry wt. |% dry wte Peterborough, Ont. 5/10/43 | HeAs Senn 1915A| leaves 17.1 0.71 1915B] stems 22.3 0226 Hamilton, Ont. 2/10/42 | W. Garland 1342 | pods 69 0.63 Carleton Co., Mt. 27/10/42 | Sehool children | 1346 | seed 29.0 0.30 Brebeuf, Que. 17/7/42 L. Coupal 299 | whole 10.6 0075 Perkins Mill, Que. 5/8/42 G. Anderson 504 | leaves &| 16.8 2.82 pods 505 | stems Zhe, 0.37 Gatineau Point, Que. 5/8/42 G. Anderson 506 oi &| 15.0 1.48 pods 507 | stems 18.7 0.53 Carleton Co., N.B. 29/6/h2 M.B. Moore, 863 | shoots 8.7 0.47 JIL Howat Auburn, N.S. 5/7/42 A.E. Roland 248 | leaves W.2 0.70 248A) stems 16.5 0.40 Waterville, N.S. 27/7/42 E. Buchanan 455 | shoots 13.5 0.81 14/10/42 | BM. Lewis 1348 | whole 10.3 0.41 Asclepias tuberosa L. Brantford, Ont. 24/7/42 D.W. Minshall 390] leaves 12.5 1.01 391} stems ls 0.22 392 | roots 12.2 0.16 Brantford, Ont. 2/8/42 F. Luck 7301 shoots 13.6 1.16 731 | roots 8.8 0029 Ottawa, Ont.(41-88-3) | 19/8/43 | M.N- Zinek 1739 | leaves 13.4 1.50 Ottawa, Ont.(42-17-4) | 19/8/43 MN. Zinck 1731 | leaves 16.3 1.70 24/8/43 | MN. Zinck 1797 | leaves 75 0.68 Brant Coe, Ont. 2/9/42 | D.W. Minshall | 1339 | stems 4.0 0.20 1340 | roots 10.7 0.12 1343 | pods 4b 0.20 Ottawa, Ont.(42-17-4) | 6/10/42 | M.N- Zinck 991 | leaves 15.7 0.90 990 | stems 9.8 0.27 Ottawa, Ont. (41-88-3) 6/10/42 | M.N. Zinck 986 | leaves 12.8 1.09 985 | stems 10.1 0.26 Asclepias verticillata L. Ottawa, Ont.(X-162-1-2} 6/10/42 | M.N. Zinok 993 | leaves 16.0 0.68 992 | stems 8.9 0.17 Aster commtatus (T. & G.) Gray Eastend, Sask. 2/8/h2 | HS. Jones 1044 | whole 5.8 0.18 ist aeesideat, Eastend, Sask. 2/8/42 | HS. Jones 646 | whole 5.9 0.33 Aster laevis L. Rosthern, Sask. 18/8/42 R.C. Russell 867 | whole 6.8 043 Beatty, Sask. 20/8/42 | R.C. Russell 866 | whole 6.5 0.20 Stewart Valley, Sask. | 1/9/h2 ee eager 878 | whole 9.0 0.29 EFastend, Sask. 2/8/42 H.S. Jones 1051 | whole 5.6 0.36 642 | whole 6.6 0.37 - 20 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours ~ Continued. Acetone Benzene Date Lab. Part Scientific name Locality collected Collector No. | analyzed Sane aa Aster laevis L. - Continued Eastend, Sask. 2/8/42 H.S. Jones 651 | whole 6.7 Ohh Aster macrophyllus L. Ottawa, Ont. 25/8/42 | He Groh 676 | whole 542 0.29 Aster novi-belgii L. Eastend, Sask. ?/8/42 H.S. Jones 11050 | whole 567 0.25 Aster salicifolius Lam. Eastend, Sask. 7/8/42 | H.S. Jones 643 | whole 58 0.40 Atropa belladonna L. Ottawa, Ont.(41-462-7) [16/10/42 | M.N. Zinck 1102 | leaves 8.2 0,02 1101 | stems 10.6 0.01 Baptisia australis (L.) R. Br. Ottawa, Ont.(39-94-39) | 7/7/42 | HeA. Senn, 162 | whole 20.6 0.34 D.C. McIntosh Beta vulgaris L. Ottawa, Ont. 2/10/42 | MeN. Zinck 1064 | leaves 5.5 0.04 1063 | root 5.2 0.05 Betula papyrifera Marsh. Dropmore, Man. 2/8/42 Skinner Nursery | 463 | bark 30.3 0.34 Brassica sp. Ottawa, Ont. 16/10/42 | M.N. Zinck 134 | leaves & 4.0 0.13 stems Brassica oleracea L. var. gemmifera Jenker | Ottawa, Ont. 23/8/43 M.N. Zinck 11791 | leaves 10.7 0.26 Cakile edentula (Bigel.) Hook. East River Port, N.S. |15/7/42 M.N. Zinek 361 | whole 9.0 0.27 Campanula alliariaefolia Willd. Ottawa, Ont. (40-75-23) | 29/6/42 D.C. McIntosh 88 | shoots n.7 0.56 89 | roots beh 0.19 Campanula americana L. Morpeth, Ont. 27/7/42 C.C. Bell 494 | whole 72 0.38 Campanula betonicaefolia Sibth. & Sn. Ottawa, Ont .(40-75-234)| 29/6/42 D.C. McIntosh 90 | shoots 10.7 O49 Ottawa, Ont. 1/7/42 | Hed. Senn, 115 | shoots 11.6 0.46 D.C. McIntosh 113 | shoots 13.5 0.66 Campanula carpatica Jacq. Ottawa, Ont. 1/7/42 H.A. Senn, 125 | whole 7.8 0.64 D.C. McIntosh 128 | whole 2 0.80 132 | shoots 10.9 0.64 Campanula fenestrellata Feer Ottawa, Ont. 1/7/42 H.A. Senn, 130 | whole 10.1 0.38 D.C. McIntosh Campanula glomerata L. Ottawa, Ont. 1/7/42 H.A. Senn, 126 | whole 9.2 0.54 D.C. McIntosh Campanula glomerata L. var. superba Ottawa, Ont. 1/7/42 H.A. Senn, 116 | whole 9.3 0.61 D.C. McIntosh Campanula latifolia L. Ottawa, Ont. 23/6/42 H.A. Senn 58 | shoots 23.8 0.58 Ottawa, Ont. 1/7/42 H.A. Sem, 124 | shoots 905 0.66 D.C. McIntosh 122 | shoots 8.2 0.53 Campanula marchesetti Witasek Ottawa, Ont. 1/7/42 H.A. Senn, 129 | whole 11.8 0.55 D.C. McIntosh Campanula persicifolia L. Ottawa, Ont. 1/7/42 H.A. Senn, 123 | whole 10.3 0.39 D.C. McIntosh Campanula rapunculoides L. Crediton, Ont. 4/7/42 | 1.0. Gaiser 438 | whole 10.6 0.36 15/7/h2 L.O. Gaiser 432 | shoots 12.0 0.27 433 | roots Toh 0.10 Kitchener, Ont. 11/7/42 F.H. Montgomery [1054 | whole 4.8 0.34 Ottawa, Ont. 1/7/42 | HeA- Senn, 121 | whole 9.8 0.75 D.C. McIntosh Fredericton, N.B. 25/7/k2 JeL. Howatt 860 | whole 602 0.20 Kentville, N.S. 13/7/42 | RM. Lewis 621 | whole Teh 0.33 -21- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with bensene for three hours - Continued. Acetone | Benzene Scientific name Locality Date Collector Lab./ Part extract, | extract, collected No. analyzed r 4 ary whe 4 dry wt. Campanula rotundifolia L. Vancouver, B.C. 26/6/42 | Je Davidson 187 | whole 10.6 0.23 Fort Saske, Alta. 8/7/42 | G.H. Turner 311 | whole 24 0.51 Pearce, Alta. 10/7/42 | Jed. Sexemith 379 | shoots 9.0 0.28 Katepwa Beach, Sask. 1/7/42 | LeT. Carmichael | 277 | shoots 13.3 0.40 Sutherland, Sask. 10/7/42 | RC. Russell 538 | whole 10.2 0.28 Morden, Man. 1/7/42 | HoH. Marshall 750 | whole 11.0 0.26 Ottawa, Ont. 23/6/42 | HeA. Senn 57 | shoots 11.3 0.43 Fredericton, N.B. 22/7/42 | 8.F. Clarkson, 853 | whole n.3 0.22 J.L. Howatt Campanula rotundifolia L. var. intercedens Galt, Ont. 7/9/42 | F.H. Montgomery {1055 | whole 9.6 O49 (Witasek) Farw. Parker's Cove, N.S. 22/8/42 | R.M. Lewis 809 | whole 8.2 0.55 Campanula trachelium L. Ottawa, Ont. 1/7/42 | HA. Senn, 118 | whole 10.8 0.68 D.C. McIntosh 119 | roots Bh 0.29 120 | whole 12.0 0.76 Cannabis sativa L. E. Chatham, Ont. 28/8/42 | D.A. Arnott 1300 | stems, hed 0.17 leaves Ottawa, Ont. 9/7/42 | Anonymous 200 | whole 10.8 0.24 Cardaria draba (L.) Desv. Ottawa, Ont. 8/7/42 | Ge Anderson 199 | whole 7.8 0.31 258 | seed 8.2 0.10 heads Catananche coerulea L. Vancouver, B.C. 26/6/42 | Je Davidson 178 | whole 6.9 0.27 Centaurea jacea L. Ottawa, Ont. 5/8/42 | HA. Senn 483 | shoots 8.6 O48 Centaurea macrocephala Puschl. Ottawa, Ont. 7/7/42 | HA. Senn, 161 | whole 9k 0.27 D.C. McIntosh Chelidonium majus L. Kitchener, Ont. 16/9/42 | FeH. Montgomery [1065 | whole 10.7 0.37 Beamsville, Ont. 20/7/42 | F. Ransom 587 | whole 11.2 0.31 Ottawa, Ont. 24/6/h2 | He Groh 59 | shoots 15.8 0.49 60 | roots 10.4 0.34 Fredericton, N.B. 8/7/h2 | J.Le Howat, 850 | whole 9.5 0.26 S.F. Clarkson Chenopodium album L. Bourgald's Port, N.S. 12/7/42 | MN. Zinck 368 | whole 8.7 0.26 Fast River Port, N.S. 15/7/42 | MN. Zinck 362 | whole 8.9 0.33 Chryscthamnus nauseosus (Pall.) Britt. sep. |Lytton, B.C. 23/6/42 | Hardy 895 | whole 12.5 002k Bigelovia graveolens Nutt. Chrysothamnus nauseosus (Pall.) Britt. vars Summerland, B.C. 15/6/42 | GE. Woolliams 136 | leaves 221 0.25 speciosus (Nutt.) Hall. 137: | teas ae 028 138 | roots 3.5 0.67 30/6/42 | GE. Woolliams 237 | leaves 17h O14 236 | woody 507 0.18 stems 13/7/h2 |G.E. Woolliams | 467 | leaves, 6.9 0.16 stems 3/8/42 |G.E. Woolliams 598 | leaves, 8.4 0.16 stems 17/8/42 |G.E. Woolliams 725 | leaves, 20.0 0.55 stems = 22 < Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Date lab. Part Acetone Benzene Scientific name Locality collected Collector No. | analyzed Pe aiget anak Chrysothamus nauseosus (Pall.) Britt. var. 72h) woody 5.8 0.16 speciosus (Nutt.) Hall. - Continued steus 31/8/42 G.E. Woolliams 832 ae 9.8 0.39 stems 833 | woody 30h O.5h stems Cichorium intybus L. Vancouver, B.C. 26/6/42 J. Davidson 189 | shoots 73 0.13 Beamsville, Ont. 1/7/42 F, Ransom 582 | shoots 767 0.11 Harwich Twp., Ont. 10/8/h2 | C.C. Bell 613 | whole 5.8 0.09 Blenheim, Ont. 13/8/42 | He Millar 607 | shoots 705 0.18 Preston, Ont. 2/9/42 | He Groh 778 | whole 6.1 0.11 Crediton, Ont. 2/9/42 | LO. Gaiser 788 | whole 6.7 0.21 Ottawa, Ont. 11/6/42 W.H. Minshall 27 | shoots 6.3 0.20 28 | roots 8.7 0.24 Ottawa, Ont. 2/7/42 | M.N. Zinck 151] whole 10.0 0.27 24/8/42 MON. Zinck 1795 | leaves 10.7 0.29 : Highbury, N.S. 17/7/42 | BM. Lewis 620 | whole 6.3 0.06 Comptonia peregrina (L.) Coult. Carleton Co., Ont. 10/7/42 ere 217 | whole 2307 0.11 D.C. McIntosh Convolvulus americanus (Sims) Greene Eastend, Sask. 2/8/42 H.S. Jones 647 | whole 1567 0.31 Convolvulus arvensis L. Ottawa, Ont. 22/6/42 H.A. Senn 42 | shoots 15.2 0.23 15/7/42 | He Groh 268 | shoote 13.8 0.20 Convolvulus sepium L. Victoria, B.C. 30/6/42 | AE. Pickford 197 | shoots 13.9 Ook Morden, Man. 16/7/42 H.H. Marshall 756 | shoots 8.0 0.13 Rondeau Park, Ont. 17/8/42 c.C. Bell 628 | shoots 17.6 0.22 Ottawa, Ont. 7/8/42 H. Groh, 514 | shoots 16.2 0.17 G. Anderson Kentville, N.S. 3/7/h2, | RM. Lewis 246 | shoots 16.4 0.40 ‘Halifax, N.S. 24/9/42 | MoS. Brown 1043 | whole 10.1 0.32 Convolvulus spithameus L. Shoalbake, Man. 7/1/42 | MeG. Dudley 399 | whole 16.9 0.19 Cotinus coggygria Scop. Ottawa, Ont. 2/7/h2 D.C. McIntosh 141 | leaves 28.0 0.19 142 | stems 10.3 0.06 Coreopsis grandiflora Nutt. Ottawa, Ont. 29/6/42 | D.C. McIntosh 104 | whole 10.2 0.13 Crepis capillaris (L.) Wallr. Ottawa, Ont. 20/7/42 | H. Groh 317 | whole 967 0.57 Crepis sp. Humboldt, Sask. 24/6/42 R.C. Russell 295 | whole 9.7 0.17 Crepis runcinata (James) T. & G. Watson, Sask. 29/7/42 | Bed» Sallans, 522 | whole Veh 0.80 3 R.C. Russell Eastend, Sask. 30/7/42 | RA. Wilkinson | 557 | whole 10.7 0.34 Morden, Man. 25/6/h2 H.H. Marshall 735 | shoots 7.6 0.28 Crepis tectorum L. Fort Sask., Alta. 27/6/42 G.H. Turner 256 | tops 22.0 0.22 Cuscuta gronovii Willd. Picton, Ont. 25/8/42 G. Anderson 660 | whole 12.5 Ooh3 Cyclanthera pedata Schrad. Ottawa, Ont. 12/10/42 | MN. Zinok 949 | shoots 705 0.09 Cynanchum furcatum L. Pers. Ottawa, Ont. 7/7/42 H.A. Senn, 165 | shoots 18.0 0.46 D.C. MoIntosh - 23 - Table 1, Resin and rubber centent of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Centinued. Acetone | Benzene Date Lab. Part Scientific name Locality collected Collector No. | analyzed Peele Pye , Cynanchum luteum Steud. Ottawa, Ont. 23/6/h2 H.A. Senn 55 | shoots 17.7 047 Cynanchum medium R.Br. Ottawa, Ont. 7/7/42 | HA. Senn, 167 | shoots 16.6 Ook D.C. McIntosh Cynanchum efficinale Ottawa, Ont. T/1/42 H.A. Senn, 166 | sheots 17.5 0.61 D.C. MeIntesh Danous careta L. Ottawa, Ont. 1/10/42 | M.N. Zinck 940 | sheets 768 0.14 939 | roots 2hel 0.15 Delphinium ajacis L. Ottawa, Ont. 1/10/42 | MN. Zinek 1061 | whole 11.2 O14 Echium vulgare L. Ottawa, Ont. 2/7/42 | MN. Zinck 149 | whole 8.0 0.26 Erigeron asper Nutt. Merden, Man. 1/7/42 H.H. Marshall 749 | whole 10.2 0.17 Erigeron canadensis L. Morden, Man. 1/7/42 | HeH. Marshall 754, | whole 72 0.16 Ottawa, Ont. 23/6/42 H.A. Senn 52 | shoots 6.1 0.39 53 | roots 46 0015 Ottawa, Ont. 20/8/42 H. Groh 601 | whole Teh 0.35 Erigeron speciosus DC, Ottawa, Ont. 29/6/h2 | D.C. McIntosh 96 | shoots 8.5 0.36 Erigeron subtrinervis Rydb. Ottawa, Ont. 29/6/42 | D.C. McIntosh 105 | shoots 8.7 0.40 Euccamia ulmoides Oliver Saanichton, B.C. 1/11/42 | Dom. Exp. Sta- /[1359 | leaves 10.9 1.37 tion 1361 | woody 77 O42 stens 1360 | stem 19.8 1.03 bark Euonymus alata (Thunb.) Sieb. Saanichten, B.C. 1/11/42 er Exp. Sta- |1367 | stems 8.8 0.19 on 1366 | stem 10.2 0.22 bark 1365 | root 707 0.25 bark 1368 | roots 9e2 0.97 Ottawa, Ont. 2h/7/42 D.C. McIntosh 345 | leaves 13.9 1.19 346 | woedy 11.0 0.34 stems 23/7/42 | D.C. McIntesh 327 | leaves 15.3 0.66 328 | woedy 10.1 0.23 stems a Saanichten, B.C. 1/11/42 | Dom. Exp. Sta- | 1355 | stems 9.0 0.31 Euonymus europes L. » ten 1354 | stem 12.0 0.22 bark 1353 | root 10.1 3.23 bark Ottawa, Ont. 23/7/42 D.C. McIntosh 325 | leaves 13.5 1.19 326 | stems 7.0 Obst 23/7/h2 D.C. McIntosh 329 | leaves, 1462 1.20 fruit 330 | woody 8.9 O47 stems 23/7/h2 D.C. McIntosh 337 | leaves 22.1 0.89 338 | woody Tel 0.37 stems - 2h- Table 1. Resin and rubber content of plants determined by extraction with acetene for six hours and followed by extractien with benzene for three hours - Continued. Date Lab part | Acetone | Bensme Scientific name Lecality Collector . extract,| extract collected No. analyzed & dry ute % ary wt. Euonymus europea L. - Continued Ottawa, Ont. 23/7/42 | D.C. McIntosh 353 | leaves 6 1.24 35k | woody TT 045 stems 23/7/42 | D.C. McIntosh 349 | leaves 12.9 1.27 otens 23/7/h2 | D.C. McIntosh 355 | leaves 12.4 1.21 356 | woedy 8.2 0.62 stems 23/7/42 | D.C. McIntosh 359 | leaves 12.1 1.20 360 woody 76 0.48 stems Ruonymus europaea L. var. angustifolia K.F. Ottawa, Ont. 24/7/42 | D.C. McIntosh 342 | woody 5.6 0.31 Schulz. stems 341 | leaves 13.5 1.03 Euonymus europaea L. var. intermedia Gaud. Ottawa, Ont. 23/7/42 | D.C. McIntosh 321| leaves, 15.9 0.99 fruit 322) woedy Te2 0.29 stems Buonymus japonica L. Saanichton, B.C. 1/11/42} Dom. Exp. Sta- | 1372| leaves Shek 0.33 tion 1375 | stens 10.8 0.05 1374| stem bark 32.7 0.11 1373 | reet bark 16.1 0.07 Euonymus lanceifolius Loes. Ottawa, Ont. 24/7/42 | D.C. McIntosh 343| leaves, 12.0 1.11 fruit 344) woedy beh 0.34 stens Euonymus mackii Rupr. Saanichton, B.C. 1/11/42| Dom. Exp. Sta- 1356] root bark! 95 6.06 tion 1357| stem tc 11.9 0.62 1358| stems 91 0.87 Ottawa, Ont. 24/7/42 | DC. McIntosh 357| leaves 13.4 1.33 358| woody Dok 0.80 stems Buonymus nana Bieb. Ottawa, Ont. 24/7/h2 | D.C. McIntosh 351| leaves 1.7 1.08 352] woody Teh 0.36 stems Euonymus nikoensis Nakai Ottawa, Ont. 23/7/42 | D.C. McIntosh 323] leaves 1406 0.66 324| woody bb 0.26 stems Kuonymus obovata Nutt. Ottawa, Ont. 24/7/42 | D.C. McIntosh 339| leaves 20.8 0.62 340] woedy 6.5 0.38 stems Euonymus radicans Sieb. Saanichton, B.C. 1/11/42| Dom. Exp. Sta- 1379| leaves 91 0.27 tion 1380] sten ae Beh 1.30 1381} root bar! 6.3 1.68 1382) small 4.8 1.01 stems 1/11/42| Dom. Exp. Sta- 1376] leaves 8.5 0.39 tion - 2- Table 1. benzene for three hours - Contimed. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Date Lab eave Acetone Benzene Set bs extract. extract entific name ieaamuad collected Collector No. | analyzed |, panied , aus ce 1378 | small 6.1 0.68 stems 1377 | stem bark} 13.1 1.09 1/11/42 | Dom. Exp. Sta. 1370 | stem bark/ 13.1 1.51 1369 | leaves 567 Odd 1371 | stems heb 0.46 Euonymus verrucosa Scop. Ottawa, Ont. 23/7/h2 | D.C. McIntosh 333 | leaves 15.7 1.06 334 | woody 13.1 0023 stems Euonymus yedoensis Koehne Saanichten, B.C. 1/11/42 | Dom. Exp. Station! 1362 | root bark 9.6 0.56 1363 | stem bark} 11.9 0.23 1364 | stems 707 0.25 Ottawa, Ont. 13/10/42 |M.N. Zinck 952 | leaves 15.8 2.69 951 | small 9.2 0.76 stems 953 | fruit 28.1 0.60 Euonyms yedoensis Koehne var. koehneana Ottawa, Ont. 23/7/42 | D.C. McIntosh 331 | leaves 13.0 1.48 Loes. 332 | woody 7.0 0.46 stems 23/7/42 | D.C. McIntosh 347 | leaves, 1407 1.19 fruit 348 | woody Tel 0.38 stems Eupatorium maculatum (L. ) Ottawa, Ont. 29/7/42 |HeA. Senn, 428 | stems, 8.8 0.29 M.N. Zinck flowers 427 | leaves We9 0.54 5/8/42 |HeA. Senn 482 | shoots n.3 0.34 Highbury, N.S. 17/7/42 | RM. Lewis 62h | whole 6.9 0.31 y Ottawa, Ont. 29/7/42 |HeA- Senn 420 | leaves. 22.5 0.25 Eupatorium perfoliatum L ’ MN, one rapide 421 | stems 4.0 0.01 Highbury, N.S. 17/7/h2 | RM. Lewis 616 | flowers, 11.2 0.08 leaves, stems Shagomock, N.B. 29/6/42 |M.B. Moore 851 | whole hed 0.07 Eupatorium purpureum L. peer 8.F. Clarkson, J.Le Howatt Ottawa, Ont. 5/8/42 | HA. Senn 478 | leaves 13.5 0.82 Eupatorium rugosum Houtt. ’ Flowers 479 | stens 25 0.11 Euphorbia corollata L. Point Pelee, Ont. 5/6/h2 | HoT. Gussow 8 | whole 18.9 0.28 Morpeth, Ont. 27/7/42 \C.C. Bell 496 | whole 1.0 0.24 Crediton, Ont. 2/9/42 |L.0. Gaiser 795 | whole 16,1. 0.25 2/9/42 |L.O. Gaiser 793 | stems, A1e1 0.22 leaves, fruit 79 | roots 10.8 1.75 Vancouver, B.C. 23/6/42 | J. Davidson 181 | whole 1.6 0.38 Euphorbia cyparissias L. = 26 = Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours ~ Continued. eee mated collected | Collector | FP" | saat aa ca cane Euphorbia cyparissias L. - Continued Vineland, Ont. 1/10/42 | L. Richardsen 1310 | whole 12.5 0.26 L'Orignal, Ont. 28/7/42 | E.G. Anderson 415 | whole 14.7 0.18 Gatineau, Que. 26/6/42 | H. Groh 73 | whole 13.0 0.54 Charlottetown, P.E.I. 1/7/42 | RR. Hurst 302 | whole 18.4 0.28 Kentville, N.S. 8/7/42 | RM. Lewis 250 | leaves, Wel 0.39 stems, roots 8/7/42 | R.M. Lewis 251 | flowers, | 12.0 0.21 leaves, stems Euphorbia deflexa Sibth. & Sm. Ottawa, Ont. 6/4/43 | MeN. Zinck 1519 | whole 12.2 0.32 26/5/43 | MN. Zinek 1540 | whole 10.1 0.15 Euphorbia esula Le Vancouver, B.C. 23/6/42 | Je Davidson 170 | leaves, 8.7 0.18 stems, seeds Pearce, Alta. 10/7/42 | Jed» Sexsmith 384, | whole 12.3 0.23 Ft. Sask., Alta. 13/7/42 |G.He Turner 309 | whole LA 0.42 N. Battleford, Sask. 17/9/42 |R.C. Russell 1316 | whole Fok 0.25 Sydney, N.S. 26/6/42 | RM. Lewis 626 | whole 10.2 0.21 Euphorbia exigua L. Ottawa, Ont. 26/5/43 |M.N. Zinck 1541 | whole 8.2 0.15 Euphorbia glyptosperma Engelm, Melrose, Man. 15/9/43 |C.C. Kusmerchak | 1880 | whole 8.9 0.68 Ottawa, Ont. 26/8/42 |He Groh 672 | whole 17.8 0.57 Euphorbia helioscopia L. Ft. Sask., Alta. 1/7/42 |G eH. Turner 222 | whole 12.7 0.22 New Minas, N.S. 3/7/42 | RM. Lewls 242 | whole Rk 0.17 Euphorbia ipecacuanhae L. Ottawa, Ont. 9/3/43 |MeN. Zinck 1513 | whole 11.2 0.17 Euphorbia lagasceae Spreng. Ottawa, Ont. 9/3/43 |\M.N. Zinck 1515 | whole 13.3 0.42 Euphorbia lathyrus L. Vancouver, B.C. 23/6/h2 | J. Davidson 182 | whole 12.2 0.15 Ottawa, Ont. 9/3/h3 |M.N. Zinck 1511 | whole 13.3 0.22 9/3/43 |M.N. Zinck 1512 | whole Wel 0.16 Euphorbia marginata Pursh. Hamilton, Ont. 7/8/42 |W. Garland 826 | leaves, 12.4 0.48 fruit 827 | stems 5.6 0.16 Euphorbia peplus L, Victoria, B.C. 30/6/42 |A.E. Pickford 198 |whole 15.2 0.31 Vancouver, B.C. 26/7/42 |J.W. Eastham 517 | whole 13.7 0.19 Hamilton, Ont. 20/7/42 |F. Ransom 581 | whole 2.8 0.26 Westboro, Ont. 24/9/42 |H. Groh 882 | whole 13.9 0.15 Euphorbia polychroma Kern. Ottawa, Ont. 7/7/42 |HoAs Senn, 168 | stems, 18.5 0.31 D.C. McIntosh leaves, fruit Euphorbia polygonifolia L. Morpeth, Ont. 1/8/42 |C.C. Bell 499 | leaves, 26.2 0.20 stems, fruit Euphorbia preslii Guss. Rondeau Park, Ont. 8/9/42 |C.C. Bell 837 | whole 12.2 0.23 Euphorbia serpyllifolia Pers. Craigmyle, Alta. 5/8/42 |A-H. Brinkman 521 | whole 15.9 0.28 Eastend, Sask. 1942 H.S. Jones 719 |whole 13.7 0.26 Fort Garry, Man. 26/8/h2 |WeA. Hagborg 764, | whole 10.2 0.38 ey em Table 1. Resin and rubber content of plants determined by extraction with acetone benzene for three hours - Continued. for six hours and followed by extraction with SeLentific name Locality uve isd Collector aa Pra ail A siden era % dry wt. |% dry wt. Euphorbia stricta L. Ottawa, Ont. 9/3/43 | MN. Zinck 151, | whole 13.7 0.16 Euphorbia supina Raf. Rondeau Park, Ont. 8/9/42 | CC. Bell 843 | whole 13.2 043 31/7/42 | C.C. Bell 498 | leaves, 15.5 0.45 stems Ottawa, Ont. 26/8/42 | He Groh 673 | whole 18.9 0.34 Euphorbia vermiculata Raf. Ottawa, Ont. 7/8/42 |M.N. Zinck 503 | whole 18.9 0.62 Ficus carica L. Vancouver, B.C. 26/6/42 | J. Davidson 191 | leaves 16.6 0.22 190 | woody 10.8 0.20 stens Foeniculum vulgare Mill. Ottawa, Ont. 2/10/42 |M.N. Zinck 1059 | whole 9.0 Ol Fucus vesiculosus L. Chester, N.S. 22/7/42 |M.N. Zinck 364 | whole 16.9 0025 Galinsoga ciliata (Ref.) Blake Ottawa, Ont. 7/9/42 | He Groh 786 | whole 5.8 0.53 Gentiana crinita Froel. Ottawa, Ont. 25/8/42 |H. Groh, 677 | whole 2567 0.16 W.H. Minshall Geranium pratense L. Ottawa, Ont. 29/6/42 |D.C. McIntosh 101 | shoots 16.5 0.13 Gerardia paupereula (Gray) Britton Ottawa, Ont. 1/9/42 | J.B. MacLaughlin | 787 | whole 13.4 0.19 Grindelia squarrosa (Pursh) Dunal. Eastend, Sask. 30/7/42 |R.A. Wilkinson 561 |whole 17.3 0.20 S. Saskatoon, Sask. 7/6/42 |R.C. Russell 679 | whole 16.0 0.16 Eastend, Sask. 2/9/42 |H-S. Jones 1049 |whole 1.2 0.09 2/9/42 |\HeS. Jones 652 |whole 16.5 0.30 St. Vital, Man. 9/8/42 |A. Simpson 568 | whole 16.3 0.26 Selkirk, Man. 27/8/42 |C. Meyer 500 | shoots 21.2 0.24 Westboro, Ont. 14/8/42 |H. Groh 570 |whole 122.3 0.26 Wellington, Ont. 20/8/42 |L.N. McFaul 656 | shoots 172 0.29 Belleville, Ont. 25/8/42 |G. Anderson 658 | shoots 16.6 0.30 Gutierrezia diversifolia Greene Eastend, Sask. 2/8/h2 |H.S. Jones 717 |whole 13.8 0.21 Gypsophila paniculata L. Ottawa, Ont. 29/6/h2 ¢. McIntosh 98 | shoots 10.2 0.23 Haplopappus spinulosus (Pursh) DC, Saskatoon, Sask. 9/7/42 |R-C. Russell 533 |whole 5.6 0.27 Helenium autumnale L. var. grandiflorum Cloverdale, B.C. 4/8/42 |Dom. Ent. Lab. 578 |whole 96 0.08 (Nattall) T. & G. Helianthus annuus L. Ottawa, Ont. 5/8/42 |HeAe Senn 484 | shoots 6.6 0.26 Helianthus divaricatus L. Carleton Co., Ont. 10/7/42 Pi aa 218 |whole Be O87 D.C. McIntosh Helianthus tuberosus L. Ottawa, Ont. 17/10/42 .|A. Gosselin 1344 | shoots 4.5 0.08 19/lL/42 |HeA. Senn 1308 |root 367 0.20 30/11/42 |A. Gosselin 1352 | root 3.0 0.17 Heliopsis helianthoides Sweet. Ottawa, Ont. 29/6/42 {D.C. McIntosh 106 |shoots 8.5 0.26 Hieracium aurantiacum L. Milford Bay, Ont. 28/6/42 |W.H. Minshall. 110 |whole 11.8 0.33 Beamsville, Ont. 9/7/42 |Fe Ransom 584 |whole 12.6 0.34 Ottawa, Ont. 25/6/42 |E.G. Anderson 69 |whole 1.9 0.33 27/8/43 |M.N. Zinck 1806 |leaves 1.7 0.37 27/8/43 oN. Zinck 1807 |leaves 12.4 0.34 27/8/43 oN. Zinck 1809 leaves 19.2 0.27 = 2 = Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name Locality acilectad Collector i ateced act, ane, Hieracium aurantiacum L. = Continued 27/8/43 | MeN. Zinck 1819 | leaves 11.2 0.26 25/9/h3 | MN. Zinck 1903 | leaves 10.5 Oeh2 16/10/42 | MN. Zinck 1104 | leaves, 8.6 0.09 roots Ancienne Lorette, Que.| 18/6/42 | WH. Minshall 33] whole 8.5 0.30 Lascelles, Que. 12/7/42 | H. Groh 230| whole 905 0.37 Brebeuf, Que. 3/8/42 | Le Coupal 461] whole 77 0.22 Everett, N.B. 27/6/42 | SeF. Clarkson, 857] whole 606 O14 M.B. Moore, JL. Howitt Wolfville, N.S. 17/6/42 | RM. Lewis 83 | whole 12.1 0.34 Hieracium canadense Michx. Fort Sask., Alta. U,/7/42 | GH. Turner 374 | whole 76 0.20 Ottawa, Ont. 15/7/42 | He Groh 2¢7| whole 9.0 0.27 27/8/43 | M.N. Zinck 1808 | leaves 15.0 0047 27/8/43 | MN. Zinck 181, | leaves 14.8 0.22 Brebeuf, Que. 3/8/42 | Le Coupal 4,60 | whole 9.3 0.17 Hieracium florentinum All. Ottawa, Ont. 13/6/42 | He Groh 31| shoots 9.3 Oo2h 27/8/43 | MN. Zinck 1820 | leaves 99 0.30 New Minas, N.S. 5/7/42 | RM. Lewis 247 | whole 13.5 0.48 Hieracium floribundum Wimm. & Grab. Ottawa, Ont. 27/8/43 | MeN. Zinck 1816 | leaves 13.7 0.40 Kentville, N.S. 17/6/42 | R.M. Lewis 81] whole 13.3 O47 Hieracium paniculatum L. New Minas, N.S. 10/8/42 | R.M. Lewis 689 | whole 12.3 0.07 Hieracium pilosella L. Ottawa, Ont. 27/8/43 | M.N. Zinck 1805 | leaves lb O42 27/8/43 | MN. Zinck 1810] leaves 11.0 0.37 27/8/43 | MN. Zinck 1811 | leaves 11.0 Ohh 27/8/43 | MeN. Zinck 1812 | leaves 12.6 0.29 16/10/42 | M.N. Zinck 1229 | whole Teh 0.21 Kentville, N.S. 21/6/k2 | BM. Lewis 78| whole 1468 0636 Hieracium pratense Tausch. Ottawa, Ont. 23/6/42 | He Groh 48 | whole Bok 0.21 Hieracium scabrum Michx. Ottawa, Ont. 27/8/h3 | MN. Zinck 1818 | leaves 18.9 0.34 New Minas, N.S. 20/8/42 | RM. Lewis 697 | whole n.3 0.22 Hieracium villosum Jacq. Ottawa, Ont. 27/8/43 | MN. Zinck 1804 | leaves 1704 0.31 Hieracium vulgatum Fries Ottawa, Ont. 25/8/42 ei ae 671 | whole 2 0.28 27/8/h3 | M.N. Zinck 1815 | leaves 909 0.46 Ancienne Lorette, Que.| 18/6/42 | W.He Minshall 32 | whole 8.7 0.26 Humulus americanus Nutt. Katepwa, Sask. 1/7/42 | LeT. Carmichael 269 | whole 9.1 Oeh2 Birtle, Man. 1/7/42 | M.Ge Dudley 403 | shoots nel 0.33 Blomidon, N.S. 2/9/42 | AsEs Roland 815 | shoots 22.1 0.13 Humulus lupulus L. Lakeville, N.B. 28/6/42 | S.F. Clarkson, 862 | shoots 30h 0.07 M.B. Moore, J.L. Howatt Hypericum perforatum L. Abbotsford, B.C. 4/8/42 | Dom. Ent. Labe 573 | whole LN 0.06 Hypochaeris radicata L. Abbotsford, B.C. 4/8/42 | Dom. Mnt. Lab. 575 | whole 9.3 0.12 = 9 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific nane Locality ede Collector A eee «i ecuace , See, ¢ % dry wee |% dry wte Ottawa, Ont. 20/7/k2 | He Groh 316 | whole 8.5 0.38 Impatiens biflora L. Cape Breton, N.S. 20/8/42 | JP. MacMillan 706 | whole 4.0 0.26 Inula heleniw L. Ottawa, Ont. 5/8/42 | HA. Senn 471 | leaves, 10.5 0.76 flowers 472 | stens 6.7 0.10 Ipomoea pandurata C.F.W. Meyer Morpeth, Ont. 30/7/42 | C.C. Bell 490 | shoots 10.1 0.23 Lactuca biennis (Moench) Fern. Vancouver, B.C. 26/8/42 | 3. Davidson 177 | whole 5.3 0.28 2/8/42 | N. Boldt 654 | whole 6.9 0.25 New Westminster, B.C. | 7/9/42 | W.L. Martin 887 | leaves 10.7 0.48 888 | stems 6.5 0.09 886 | flower 14.1 0.63 heads 7/10/42 | W.L. Martin 950 | whole 49 0.04 Harwich Twp., Ont. 22/8/42 | C.C. Bell 769 | shoots 903 0.24 Ottawa, Ont. 8/9/43 | MN. Zinck 1836 | leaves 8.9 0.42 8/9/hk3 | MN. Zinek 1837 | leaves 10.2 0046 13/9/k43 | MN. Zinek 1850 | leaves 10.4 0.46 Lascelles, Que. 8/7/42 | He Groh 196 | whole 11.2 0034 Brebeuf, Que. 3/8/42 | L. Coupal 4,59 | whole 10.0 0034 Centreville, N.S. 6/7/42 | RM. Lewis 249 | whole 9.0 0.24 Margaret's Bay, N.S. 13/8/42 | M.S. Brown 818 | whole 8.7 ol 13/8/42 | M.S. Brown 820 | whole 825 | 0020 Lactuca canadensis L. Eastend, Sask. 2/7/k2 | HS. Jones 284, | whole 13.2 0.46 Preston, Ont. 2/9/h2 | He Groh 774, | whole 7.6 0.30 Ottawa, Ont. 26/8/43 | MN. Zinck 1803 | leaves 11.2 0.22 8/9/43 | MeN. Zinck 18454 leaves 9.8 0.38 van stems, 6.8 0.16 flowers Fredericton, N.B. 29/6/42 | M.B. Moore, 848 | whole 52 0.12 S.F. Clarkson, J.L. Howatt Lactuca canadensis L. var. integrifolia Howard Twp., Ont. 5/9/42 | CoC. Bell 838 | whole Tel 0.11 (Bigel.) Gray Lactuca canadensis L. var. latifolia 0. Kettle Point, Ont. 8/8/42 | He Millar 605 | shoots 903 0.23 Kuntze Lactuca canadensis L. var. typica Wieg. Kettle Point, Ont. 8/8/42 | He Millar 604,| shoots 8.8 0.28 Harwich Twp., Ont. 22/8/42 | C.C. Bell 766| shoots lk 0.09 Kentville, N.S. 3/7/42 | ReM. Lewis 245 | shoots 11.3 0.30 inetuc: mavalta. Ts Ottawa, Ont. 5/8/42 | He Groh 480 | whole 6.9 0.23 Lactuca pulchella (Pursh) DC. Ft. Sask., Alta. 27/6/h2 | G.H. Turner 226| whole 12.6 0.59 Macleod, Alta. 6/7/42 | R«He Dixon 307| whole 10.6 0.76— Edmonton, Alta. 20/8/42 | M.W. Cormack 723 | whole 9.0 0.48 Katepwa Beach, Sask. 1/7/42 | L.T. Carmichael | 274| whole 12.5 0.69 Saskatoon, Sask. 25/7/h2 | RC. Russell 525| shoots 10.7 0.70 - 30 - Table 1. benzene for three hours - Continued. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Scientific name Locality Peet Collector ee ete amet, an Lactuca pulchella (Pursh) DC. - Continued Eastend, Sask. 30/7/42 | ReA. Wilkinson 560 | whole 12.0 0.55 7/8/42 | H.S. Jones 645 | whole 10.8 0.66 Floral, Sask. 18/9/42 | RC. Russell 1318 | whole 9.5 0.17 Morden, Man. 2/7/42 | HeH. Marshall 757 | whole 10.1 0.60 Lactuca sativa L. Ottawa, Ont. 22/8/h2 | D. Miller 633 | whole 93 0.36 22/8/42 | D. Miller 634 | leaves 1.7 0.65 Lactuca sativa L. var. crispa L. Ottawa, Ont. 22/8/42 | D. Miller 635 | whole 10.2 0.42 22/8/42 | D. Miller 636 | leaves 12.6 0.64 637 | stems, 15.0 0.53 flowers Lactuca serricla L. Oliver, B.C. 8/7/42 | HeT. Gussow 319 | whole Dek 0.28 Macleod, Alta. 2/6/42 | Res Dixon 231 | whole 906 0.22 Lethbridge, Alta. 7/1/42 | Jods Sexanith 382 | shoots 8.5 0.31 Eastend, Sask. 2/7/42 | HeS. Jones 283 | whole 11.5 Oek3 20/7/42 | ReA Wilicinson 558 | whole 903 0.20 2/8/42 | HeS. Jones 639 | whole 8.8 0.30 2/8/42 | HeS. Jones 653 | whole 76 0.19 2/9/42 | HeS. Jones 1046 | shoots 5.9 0.12 Ottawa, Ont. 11/6/42 | WeH. Minshall 29 | whole 8.6 0.33 Crediton, Ont. 15/7/h2 | L.0. Geiser 434 | whole 1567 0.23 — Beamsville, Ont. 21/7/42 | Fo Ransom 589 | shoots 13.6 0.22 Morpeth, Ont. 1/8/42 | C.C. Bell 192 | shoots 909 026 Lactuca serriola L. forma integrifolia Victoria, B.C. 30/7/42 | A-E. Pickford 553 | whole 5 0506 Eaeteen Lethbridge, Alta. 11/8/42 | M.W. Cormack 722 | whole 6.6 0.16 Fort Sask., Alta. 14/7/42 | GeHe Turner 376 | whole 79 0.29 Morden, Man. 27/6/42 | HeHe Marshall Th, | whole 10.1 0.16 1/7/42 | HeH. Marshall 736 | whole 8.5 0.26 Beamsville, Ot. 21/7/42 | F. Ransom 583 | whole 906 0.19 Ottawa, Ont. 11/6/42 | W.H. Minshall 30 | whole 91 0.32 Westboro, Ont. 14/8/h2 | H. Groh 565 | whole 8.5 0.23 Laminaria sp. Meisner's Island, N.S.| 10/8/42 | M.N. Zinck 564 | whole 6.2 0.11 Lapsana communis L. Vancouver, B.C. 26/6/42 | Je Davidson 176 | whole 8.2 Oel7 Ottawa, Ont. 5/8/42 | He Groh 481 | whole 6.5 0015 Lathyrus palustris L. Constance Bay, Ont. 10/7/42 | HeA. Senn, 216 | shoots 11.2 0.56 M.N. Zinek, D.C. McIntosh Limonium carolinianum (Walt.) Britton Bourgald's Pt., N.S. 12/7/42 | MeN. Zinck 363 | whole :) 0.21 Lobelia cardinalis L. Shirley Bay, Ont. 7/8/42 ea rare 512 | leaves 18.2 0.40 511 Hara 11.2 0.19 flowers Harwich Twp., Ont. 22/8/42 | C.C. Bell 768 | whole 12.4 0.15 Lobelia inflata L. Lascelles, Que. 7/7/42 | He Groh 278 | whole 10.9 0.33 -3l- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Acetone Benzene Selentific name Locality Re aes ea Collector Lab. Part extract, extract, Noo | analyzed |¢ ary wt. | % dry wt. Halls Harbour, N.S. 30/9/42 |R-M. Lewis 1335 |whole 12.5 0.30 Lobelia spicata Lam, Lascelles, Que. 9/7/42 | He. Groh 206 |whole 1.8 0.28 Lobelia siphilitica L. Howard Twpe, Ont. 29/8/42 |C.C. Bell 771 |whole 10.1 0.20 Lonicera alpigena L. Ottawa, Ont. 31/7/42 |D.C. McIntosh 439 | leaves, 2502 0.86 fruit 440 | woody 8.6 0.17 stems Lonicera amoena Zab. Ottawa, Ont. 31/7/42 |D.C. McIntosh 449 | leaves, 38.3 O94 fruit 450 | woody Tel 0.12 stems Lonicera iberica Bieb. var. microphylla Dipp. | Ottawa, Ont. 31/7/42 |D.C. McIntosh 451 | leaves, 2563 0.61 fruit 452 | woody 72 0.06 stems Lonicera prolifera (Kirchn.) Rebd. Ottawa, Ont. 31/7/h2 |D.C. McIntosh 447 | leaves, 19.6 0.85 fruit 448 | woody 609 009 stems Lonicera Ruprechtiana Req. Ottawa, Ont. 31/7/42 | D.C. McIntosh 443 | leaves, 2607 1.06 fruit 4hh | woody 78 0.17 stems 31/7/42 | D.C. McIntosh 445 | leaves, 30.0 1.33 fruit 446 | woody 10.1 0.21 stems 28/7/42 |D.C. McIntosh 409 | leaves, 3907 0.78 fruit 410 | woody 8.8 O14 : stems Lonicera tatarica L. Ottawa, Ont. 28/7/42 |D.C. McIntosh 405 ror 40.5 1.07 406 | woody Goh 0.09 stems Ottawa, Ont. 28/7/42 |D.C. MeIntosh 407 |leaves, L2eh 1.05 fruit 408 | woody 10.3 0.09 stems 28/7/42 | D.C. McIntosh 411 | leaves, 40.5 0.86 fruit 412 | woody 10.7 0.00 stems 28/7/42 | D.C. McIntosh 413 | leaves, 47.6 0.66 fruit 414 | woody 10.6 0.00 stens 31/7/42 |D.C. McIntosh 441 | leaves, 3965 0.89 fruit 442 | woody 9.5 O14 stems 31/7/42 | D.C. McIntosh 453 | leaves, 25.8 1.18 fruit ~ 32 Table 1. benzene for three hours - Continued. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Date Lab Part Acetone Benzene Scientific name Locality collected Collector No. | analysed E pitee Peay Lonicera tatarica L. = Continued 454 | woody 76 0.10 stems Lygodesmia juncea (Pursh) D. Don Craignyle, Alta. 30/6/42 | A-H. Brinkman 193 | whole 13.0 0.33 Pearce, Alta. 10/7/42 | Jed. Sexsmith 381 | whole 4.9 0.56 Dundurn, Sask. 23/6/42 | R.C. Russell 292 | whole 18.7 0.40 Eastend, Sask. ?/7/h2 | HS. Jones 286 | whole 146 O47 30/7/42 | ReA. Willcinson 562 | whole 15.1 Ookl Saskatoon, Sask. 25/8/42 | RC. Russell 872 | whole 15.3 019 Eastend, Sask. 2/8/42 | HeS. Jones 641 | whole 13.0 0.59 lysimachia nummularia L. Shirley Bay, Ont. 7/8/42 | He Groh 516 | whole 11.4 0.13 E.G. Anderson Malva moschata L. Ottawa, Ont. 29/6/42 | D.C. McIntosh 86 | leaves, 6.2 0.35 flowers Maclura microcarpa Fidde Ottawa, Ont. 7/7/42 | HeA. Sonn, 169 | stems, 16.5 0.13 D.C. McIntosh leaves, flowers Maclura pomifera (Raf.) Schneider Kent Co., Ont. 19/10/42 | C.C. Bell 1304, | leaves, 10.3 0.18 stems 1305 | leaves 12.7 0.21 1297 | fruit 362 0.24 Melilotus alba Desr. Britannia Bay, Ont. 29/7/42 | HA. Senn, 431 | shoots 10.3 0.15 M.N. Zinck Mentha arvensis L. var. lanata Piper Fort Frances, Ont. A. Cramg 711} whole 25 0.22 Morus rubra L. Beamsville, Ont. 1/10/42 | F. Ransom 1040] leaves 12.0 0.31 1039 | woody 606 0.19 stems Morus alba L. Ottawa, Ont. 11/6/42 | H. Groh 20 | leaves, 8.6 0.39 stems Rondeau Park, Ont. 17/8/42 | C.C. Bell 630 | leaves, 902 0.25 stems Beamsville, Mt. 1/10/42 | F. Ransom 1042 | leaves 78 0.38 1041 | woody 703 0.12 stems Kent Co., Ont. 18/10/42 | C.C. Bell 1303 | leaves, 8.6 0.29 stems Nelumbo pentapetala (Walt.) Fern. Kent Co., Ont. 22/9/42 |C.C. Bell 883 | leaves 11.2 0.07 864, | stems 6.3 0.05 885 | seed Web 0.07 heads Nepeta hederacea (L.) Trev. Westboro, Ont. 16/9/42 | H. Groh 826A) whole 3.5 O14 Nostoc sp. Ansonville, Ont. 12/8/42 | P. Pelletier 567 | whole 2h 017 Oenothera glauca Michx. var. Fraseri Torr. Ottawa, Ont. 29/6/42 | D.C. McIntosh 93 | shoots 17.9 0.28 & Gray Oenothera cymatilis Bart. Ottawa, Ont. 4/8/42 | Dom. Ent. Lab. 577 | whole Tel 0.04 Cape Breton, N.S. 20/8/42 | J.P. MacMillan 701 | whole Teh 0.24 Lun. Co., N.S. 12/7/42 |M.N. Zinck 365 | whole 6.1 0.09 Pachysandra terminalis Sieb. & Zucc. Ottawa, Ont. 7/7/u2 | HeA. Senn, 159 | whole eg 0.53 D.C. McIntosh -33- Table 1. benzene for three hours - Continued. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with Acetone | Benzene Scientific name Locality datieceal| ‘weltetloe” ten yan aea riract | sctract, Parthenium argentatum Gray Saanichton, B.C. 3/12/42 | J.J. Woods 1383 | stems, 8.5 0.64, leaves, flowers 1384 | leaves 9.1 O41 1385 | stems 63 1.40 1386 | roots 49 0.72 Penstemon diffusus Dougl. Ottawa, Ont. 29/6/42 |D.C. McIntosh 97 | shoots 18.8 O11 Perilla frutescens Britt. var. crispa Deane Ottawa, Ont. 1/10/42 |M.N. Zinck 938 | shoots 567 0.15 Pimpinella anisum L. Ottawa, Ont. 1/10/42 |M.N. Zinck 1062 | whole 10.4 0.18 Plantago juncoides Lam. var. decipiens Halifax Co., N.S. 13/8/42 |M.S. Brown 821 | whole Toh 0.16 (Barneoud) Fern. Plantago major L. Fort Frances, Ont. 2/8/42 |A. Cramg 712 | whole 707 0.33 Plantago psyllium L. Ottawa, Ont. 1/10/42 |M.N. Zinck 1058 | whole 93 0.17 Polenonium caeruleum L. Ottawa, Ont. 29/6/42 |D.C. McIntosh 87 | shoots 13.8 0.29 Polygonum convolvulus L. Ottawa, Ont. 23/6/42 |HeA. Senn 54 | whole RA 0.11 Potentilla fruticosa L. var. pyrenaica Willd. | Ottawa, Ont. 29/6/42 |D.C. McIntosh 92 | shoots 10.7 0.09 Potentilla recta L. var. obscura Koch Preston, Ont. 2/9/42 |He Groh 780 | whole 13.6 0.13 Prenanthes alba L. Kent Co., Ont. 17/8/42 |C.C. Bell 772 | shoots 8.5 0.15 Crediton, Ont. 1/9/42 |L.0. Geiser 792 | whole 11.6 0.28 Prenanthes altissima L. Ottawa, Ont. 25/8/h2 ees ieabel 674 | whole 907 0.28 Crediton, Ont. 1/9/42 |L.0. Gaiser 82k, | whole 9.6 0.39 Kent Co., Ont. 4/9/42 |C.C. Bell 1306 | shoots 8.3 0.27 Kentville, N.S. 3/7/kb2 |B.M. Lewis 243 | shoots 10.1 0.26 11/9/42 |B.M. Lewis 1325 | whole 9.0 O14 Pteridium aquilinum L. Kuhn. var. latisculum | Laurentian View, Ont. | 25/9/42 |H. Groh 889 | whole 8.3 0.16 (Desv.) Underw. Rhamnus cathartica L. Ottawa, Ont. 2/7/42 |D.C. McIntosh 147 | leaves 16.6 0.28 148 | woody 91 0.04 stems Rhus aromatica Ait. Carleton Co., Ont. 10/7/42 erases 213 hig 18.9 0.14 D.C. MeIntosh fruits Kent Co., Ont. 30/7/42 |C.C. Bell 497 | leaves, 2504 0.15 stems Ottawa, Ont. 2/7/42 |D.C. McIntosh 143 | leaves 26.3 0.13 144, | woody Joh 0.06 : stems 2/7/h2 |D.C. McIntosh 145 | leaves 29.0 0.09 146 | woody 1.0 0.05 stems Valretreau, Que. 26/6/42 |H. Groh 72 | leaves, 2702 0.09 stems Rhus glabra Le Vancouver, B.C. 23/6/42 |J. Davidson 186 ee 38.4 0.19 185 | woody 17.6 0.08 stems = 3he Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued, Acetone Bensene Scientific name Locality Date Collector Lab. | Part extract, | extract collected No. | analyzed & dry wt. & dry wt, Rhus glabra L. = Continued Morden, Man. 26/6/42 |HoH. Marshall 7h7 | whole 12.6 0.26 7h8 | leaves 19.3 0.33 Rhus radicans L. Rondeau Park, Ont. 18/8/h2 |C.C. Bell 765 | whole 16.3 0.12 Rhus radicans L. var. Rydbergii (Small) Rehd. | Vancouver, B.C. 23/6/42 |J. Davidson 184 pesrees 16.7 O.2h owers 183 | woody 12.7 0.09 stems Rhus trilobata Nutt. Saskatoon, Sask. 1/9/42 |B.J. Sallans, 881 | leaves 2202 0.07 R.J. Ledingham 880 | woody 11.2 0.06 stems Rhus typhina L. Beamsville, Ont. 7/7/42 +‘|F. Ransom 592 | leaves, 33 oh 0.19 stens. flowers Rondeau Park, Ont. 8/8/h2 |C.C. Bell 611 | leaves, 31.5 0.28 stems, flowers Ottawa, Ont. 3/6/42 |H. Groh 3 | leaves, 3367 0.21 stems 10/6/42 |H. Groh 15 | stems, 33.7 0.17 leaves 11/8/42 |H. Groh 541 | leaves hy 08 0.17 542 | stems 16.3 0.01 9/9/43 |M.N. Zinek 1858 | leaves 349 0.20 Fredericton, N.B. 29/6/42 |S.F. Clarkson, 849 | stems, 18.1 0.16 JL. Howatt leaves New Minas, N.S. 3/7/42 |RM. Lewis 241 | leaves, 30.2 0.12 stems Rorippa sylvestris (L.) Bess. Ottawa, Ont. 18/7/42 |H. Groh 303 | whole 7.0 0.28 Rudbeckia hirta L. Laurentian View, Ont. | 25/6/42 |E.G. anderson 68 | whole Teh O02 Sagittaria latifolia Willd. Terrebonne, Que. 3/8/h2 |L. Coupal 458 | whole 11.7 0.09 Sambucus canadensis L. Farmer Rapids, Que. 26/6/h2 |H. Groh 7h | Leaves, Wed 0.36 stems flowers Annapolis Co., N.S. 21/8/42 |R.M. Lewis 700 | stems, 13.1 0.62 leaves Sambucus pubens Michx. New Minas, N.S. 28/8/42 |R.M. Lewis 814 | leaves, Bus 0.19 stems Sanguinaria canadensis L. Beamsville, Ont. 11/7/42 |F. Ransom 588 | whole 13 0.19 Saponaria officinalis L. Ottawa, Ont. 20/8/42 |H. Groh 602 | whole 13.4 0.12 Sarcobatus vermiculatus Torr. Swift Current, Sask. 18/7/42 |Dom. Expt. Sta. 298 | woody 3.1 0.07 p stems Scabiosa atropurpurea L. Ottawa, Ont. 1/7/42 |HeA. Senn, 133 | shoots 13.9 0.19 D.C. McIntosh Scutellaria alpina L. Ottawa, Ont. 29/6/42 |D.C. McIntosh 103 | shoots 79 0.40 Sedum telephium L. Ottawa, Ont. 23/6/42 |HeA. Sonn 56 | whole 15.9 Os Senecio canus Hook. Birtle, Man. 7/7/42 |MeG. Dudley 400 | whole 16.2 0.26 Senecio vulgaris L. Ottawa, Ont. 24/6/42 |H. Groh 51 |whole 9.3 0.66 20/8/42 |H. Groh 600 | whole 10.3 0.36 Smilax herbacea L. Ottawa, Ont. 29/7/42 |HeAs Senn, 429 | leaves, 17.0 0.41 M.N. Zinck stems - 35 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by’ extraction with benzene for three hours ~ Continued. Scientific name Locality bearece ed Collector _ a ad. iach, ane 430 | green 13.5 0.17 fruit Solanum dulcamara L. Ottawa, Ont. 20/7/42 H. Groh 315 | whole 10.8 0.23 Solidago altissima L. Howard Twp., Ont. 5/9/42 C.C. Bell 839 | whole 12.8 0.42 Preston, nt. 2/9/42 | He Groh 777 ‘| whole 9.0 0.54 Beamsville, Ont. 13/9/42 | PF. Ransom 1038 | shoots 11.6 0.53 Milford Bay, Ont. 28/6/h2 | W-H. Minshall 111 | whole 8.0 0.22 Ottawa, Ont. 3/6/42 H. Groh 5 | leaves 11.8 0.10 5A| stems 6.8 0.00 Ottawa, Ont. 6/6/42 H.A. Senn 9 | whole 709 0.28 Ottawa, Ont. 11/6/42 H. Groh 24 | leaves 99 0.10 2hA | stems 4.3 0.07 243 | roots 9.3 0.01 20/6/42 | T. Adams 39 | shoots 9.2 0.38 Ottawa, Ont.(39-114- 22/6/43 M.N. Zinck I1560A | leaves 8.6 O42 ee 11560B | stems 21.6 0.65 Ottawa, Ont. 25/6/42 | He Groh 67 | leaves 10.4 0.20 67A | stems hel 0.09 67B | roots Boh 0.05 Ottawa, Ont .(39-11,- 7/1/43 «=| MN. Zinck 563A | leaves 965 0.35 au 1563B | stems hed 0.13 Ottawa, Ont. 15/7/42 orig ee 260 | stems 406 0-05 261 | roots Te 0.20 259 | leaves 12.7 0.20 Ottawa, Ont.(39-ll4- 22/7/h3 «| Me Sutton n587A | leaves 8.6 0.68 an) 11587B | stems 3.0 0.25 Ottawa, Ont. 29/7/42 oe eee 422 pelea 14.5 0.70 423 | stems 3.6 0.01 Ottawa, Ont.(39-114- 5/8/h3 M.N. Zinck n6O7A | leaves 10.2 1.20 ee 11607B | stems 2.5 0.26 Ottawa, Ont.(39-92~194) |10/8/43 | M. Sutton 626 | leaves U.1 0.39 Ottawa, Ont.(39-1U4- {10/8/43 | M. Sutton 628 | leaves n.1 1.10 117-3) Ottawa, Ont.(40-41- 10/8/43 M. Sutton 1630 | leaves ne. 0.85 41-4) Ottawa, Ont.(39-11l4- [11/8/43 | M.Ne Zinck 652A | leaves 10.5 1.00 a) N652B | stems 267 0.23 Ottawa, Ont. 11/8/42 H. Groh 543 | leaves 13.8 0.40 544 | stems 46 0.09 544A | roots 9.8 0.05 Ottawa, Ont.(X-2-43) [12/8/43 | M. Sutton 1656 | leaves oh 1.10 Ottawa, Ont.(X-2-44) (12/8/43 |M. Sutton 657 | leaves 13.1 1.10 - 36 - Table 1, Resin and rubber content of plants determined by extraction with acetone for aix hours and followed by extraction with benzene for three hours - Continued. ‘ Scientific name Locality poavece = Collector ae aie aa ainct, ancl Solidago altissima L. - Continued Ottawa, Ont.(X-2-60) | 12/8/43 |M. Sutton 1668 | leaves 10.9 1.30 Ottawa, Ont. (X-2-68) 13/8/43 | M. Sutton 1691 | leaves 12.5 1.00 Ottawa, Ont.(X-2-70) 13/8/43 | M. Sutton 1692 | leaves 12.3 1.60 Ottawa, Ont.(X-2-91) | 14/8/43 |M. Sutton 1713 | leaves 17.6 0.86 Ottawa, Ont.(39-114- 18/8/43 |M.N. Zinck 1728A] leaves 10.3 1.20 He) 1728B| stems 2h 0.18 Ottawa, Ont.(40-41- 20/8/43 |M.N. Zinck 1764, | leaves 11.6 0.86 141-2) Ottawa, Ont. 26/8/42 | He Groh leaves 4.0 0.60 stems 6.6 0.09 roots 10.3 0.07 Ottawa, Ont.(39-11h- | 27/8/43 | MN. Zinck 1823A] leaves 10.8 1.20 me) 18235 stems 23 0016 Ottawa, Ont.(39-114- 2/9/h3 | MN. Zinck 18314) leaves 10.8 1.20 aoe 18315 stems 2.3 0.27 Ottawa, Ont. (39-11l4- 9/9/43 | MN. Zinck leaves lls 0.95 177-1) Ottawa, Ont. 11/9/42 H. Groh 805 | leaves 14.7 0.50 806 | stems 543 0.08 : roots 10.7 0.05 Ottawa, Ont.(39-l1ls- | 16/9/43 | MN. Zinck 16834] leaves, Boh 0.63- 177-1) flowers stems 2.7 0015 22/9/43 |M.N. Zinck 1898A) leaves 12.2 0.85 1898B) stems 3h 0.04 Ottawa, Ont. 25/9/42 |H. Groh 890 | stems, 6.2 0.16 roots : 891 | leaves 14.6 1.18 Ottawa, ae 7/10/43 |MeN. Zinck oe leaves 13-6 1.20 19145 stems 4.0 0.18 Ottawa, Ont.(X-2-68) | 15/10/42 |M.N. Zinck 1110 | leaves 8.4 0.65 1109 | stens 3.6 0.07 Ottawa, Ont.(40-41- 16/10/42 |M.N. Zinck 1100 | leaves 609 0.67 ae 1099 | stens, he2 0.05 flowers Ottawa, bali 16/10/42 |M.N. Zinck 1096 | leaves 7.8 0.63 1095 | stems Lek 0.08 Ottawa, Ont.(X-2-60) 16/10/42 | MN. Zinck 1197 | leaves Fel 1.26 1198 | stems, 8.7 0.19 flowers Ottawa, Ont.(X=2-43) | 16/10/42 |M.N. Zinck 1174 | leaves 12.5 1.37 1175 jane I 5.8 0.15 Ottawa, Ont.(X-2-70) | 16/10/42 |M.N. Zinck 1223 | leaves 8.0 1.35 =~ 37 - Table 1, Resin and rubber content of plants determined by extraction with acetone for six hours benzene for three hours - Continued. and followed by extraction with Scientific name Locality Te sce Collector ae pec 2 act, act, 1124 | stems, 705 0.08 flowers Ottawa, Ont.(39-1lk- =| 16/10/42 | M.N. Zinck 1069 | leaves, 11.6 0.51 177-3) flowers 1068 | stems 4el 0.02 Solidago bicolor L. New Minas, N.S. 14/8/42 | RM. Lewis 692 | whole ll 0.17 Ingonish, N.S. 20/8/42 | J.P. MacMillan 705 | whole 7.7 0625 Solidago caesia L. Preston, Ont. 2/9/42 | He Groh 779 | whole 6.3 0.33 Beamsville, Ont. 13/9/42 | F. Ransom 1036 | whole 703 0.29 Kent Co., Ont. 28/8/42 | C.C. Bell 767 | shoots 8.4 0.37 Ottawa, Ont.(39-114- | 10/8/43 | M. Sutton 1633 | leaves 20.6 1.20 145-4) Solidago canadensis L. Ottawa, Ont. 3/6/42 | H. Groh 6 | whole 10.3 0.26 Ottawa, Ont. 27/7/42 | He Groh 386 | leaves, 15.0 0.85 flowers 387 | stems 502 0.10 Ottawa, Ont. 29/7/h2 ae eg oe 42h | leaves 17.5 0.66 425 | stems, 7.9 0.11 flowers Harwich Twp., Ont. 4/8/42 |C.C. Bell 612 | whole 10.2 O41 Rondeau Park, Ont. 7/8/42 |C.C. Bell 618 | whole 13.8 0.27 Brantford, Ont. 2/8/h2 | ¥F. Lack 732 | shoots 703 0.56 Ottawa, Ont. 5/8/42 | HA. Senn 475 | leaves 16.0 1.42 476 | stems, 708 0.13 flowers Ottawa, Ont.(39-16-62)| 10/8/43 |M. Sutton 1634 | leaves 1726 1.00 Ottawa, Ont.(X-2-56) | 12/8/43 |M. Sutton 1655 | leaves 16.7 1.10 Ottawa, Ont.(X-2-47) | 12/8/43 | M. Sutton 1660 | leaves 17.2 0.99 Ottawa, Ont.(X-2-80) | 12/8/43 | M. Sutton 1661 | leaves 15 1.50 Ottawa, Ont.(X-2-64) | 12/8/43 |M. Sutton 1665 | leaves 15h 1.30 Ottawa, Ont.(X-2-51) | 12/8/43 |M. Sutton 1667 | leaves 16.7 1.60 Ottawa, Ont.(X-2-764) | 12/8/43 |M. Sutton 1669 | leaves 2.0 0292 Ottawa, Ont.(X-2-53) | 12/8/43 |M. Sutton 1671 | leaves 15.7 1.10 Ottawa, Ont.(X-2-806) | 12/8/43 |M. Sutton 1672 | leaves 13.6 1.30 — Ottawa, Ont.(X-2-54) | 13/8/43 |M- Sutton 1680 | leaves 16.2 0.85 Ottawa, Ont.(X-2-626) | 13/8/43 | M. Sutton 1683 | leaves 17.2 1.10 Ottawa, Ont. (X-2-52) 13/8/43 | Me. Sutton 1685 | leaves 16.2 0.93 Ottawa, Ont.(X~2-71) 13/8/43 |M. Sutton 1693 | leaves 13.2 1.50 Ottawa, Ont.(X-2-51) | 13/8/43 |M. Sutton 1695 | leaves 15.3 1.10 Ottawa, Ont.(X-2-74) | 13/8/43 |M. Sutton 1700 | leaves 13.1 1.80 Ottawa, Ont.(X-2-801) | 14/8/43 |M. Sutton 1716 | leaves 20.6 1.20 Ottawa, Ont.(X-2-48) | 14/8/43 |M. Sutton 1709 | leaves 17.8 1.90 Ottawa, Ont.(X-2-87) | 14/8/43 |M. Sutton 1711 | leaves 17.3 1.30 Ottawa, ke ) 23/8/43 |M.N. Zinck 1790 | leaves 15.9 1.10 - 38- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Acetone Benzene Scientific name Locality gener d Collector Labe Part ea | wxtract, extract, colle No. janalyzed |¢ ary wt. |% dry wte Solidago canadensis L. ~ Continued Ottawa, Ont. (39-41- ) 23/8/43 | MN. Zinck 1787 | leaves 14.7 1.20 55-1 Ottawa, Ont. 14/9/43 | MeN. Zinck 1860 | leaves, 15.3 1.30 < flowers Ottawa, Ont.(X-2-801) | 16/10/42 |M.N. Zinck 1105 | stems, 72 0.04 flowers 12106 | leaves 8.8 0.93 Ottawa, Ont.(X-2-626) | 16/10/42 | M.N. Zinck 1128 | leaves 8.0 0.98 1129 | stems, 43 0.01 flowers Ottawa, Ont.(X-2-80) 16/10/42 | M.N. Zinck 1149 | leaves 705 1.33 1150 | stems, 9.1 0.12 flowers Ottawa, Ont. (X=2=53) 16/10/42 | M.N. Zinck 1251 | leaves 8.9 2.04 1152 | stems, heh 0.09 flowers Ottawa, Ont.(X-2-764) | 16/10/42 | M.N. Zinck 1158 | leaves 9.9 1.24 1159 | stems, 63 0.07 flowers Ottawa, Ont.(X-2-806) | 16/10/42] M.N. Zinck 1160 | leaves 72 0.73 1161 | stems, hed 0.15 flowers Ottawa, Ont. (X-2-/7) 16/10/42 | M.N. Zinck 1172 | leaves 9.3 1.99 1173 | stems, 501 0.13 flowers Ottawa, Ont.(X-2-51) 16/10/42 | MeN. Zinck 1176 | leaves 9.7 1.30 1177 | stems, 7,0 0.19 flowers Ottawa, Ont.(X-2-56) | 16/10/42 |M.N. Zinck 1178 | leaves Bek 1.17 1179 | stems, 75 0.16 flowers Ottawa, Ont.(X-2-74) | 16/10/42 | M.N. Zinck 1180 | leaves 8.6 2429 1161 | stems, 7.0 0015 flowers Ottawa, Ont. (X-2-54) 16/10/42 | M.N. Zinck 1189 | leaves 10.1 1.13 1190 | stems, 49 O14 flowers Ottawa, Ont.(X-2-71) 16/10/42 | MN. Zinek 1195 | leaves 76 1.75 1196 | stems, 6.0 0.19 flowers Ottawa, Ont.(X-2-87) | 16/10/42 | MeN. Zinck 1217 | leaves 6.3 0.60 1218 | stems, 3.5 0.10 flowers Ottawa, Ont.(X-2-52) | 16/10/42 |M.N. Zinck 1238 | leaves 8.9 1.63 1239 | stems, 4d 0.10 flowers New Minas, N.S. 15/8/42 | RM. Lewis 695| whole 8.1 0.25 Solidago canadensis L. var. gilvocanescens Craigmyle, Alta. 5/8/42 | AH. Brinkman 520] whole 10.8 0.16 Ly Winnipeg, Man. 2/8/42 | A. Simpson 655| whole 12.1 0.20 - 39 - Table 1, Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Selentific name Locality Peis a Collector i ed cant ? anct, Solidago corymbosa Ell. Ottawa, Ont. 9/10/42 | M.N. Zinck 1016 | leaves, 1 0.74 flowers 1015 | stems eT 0.08 Solidago decumbens Greene var. oreophila Fort Sask., Alta. 12/7/42 | GH. Turner 310 | whole 8.6 062k (Rydb.) Fern. 26/7/42 | G.H. Turner 470 | whole 109 0.25 Sutherland, Sask. 25/8/42 |R.C. Russell 874, | whole 1304 0426 18/9/42 | R.C. Russell 1319 | whole 1067 0.19 Solidago dumetorum Lunell Floral, Sask. 23/6/42 | B.C. Russell 293 | whole 93 0.08 7/8/42 | RC. Russell 682 | whole 967 0.26 Saskatoon, Sask. 25/8/42 | RoC. Russell 875 | whole 98 0.29 Floral, Sask. 25/8/42 | R.C. Russell 873 | whole 10.7 0.36 Eastend, Sask. 27/8/42 | HS. Jones 714 | whole 10.8 0.35 Valley Centre, Sask. 1/9/42 | Bod. Sallans, 876 | whole 9.0 0.33 R.J. Ledingham Saskatoon, Sask. 8/9/42 | RoC. Russell 1321 | whole 10.5 O14 Floral, Sask. 18/9/42 | RC. Russell 1322 | whole 9.8 0.21 Solidago gigantea Ait. Macleod, Alta. 6/7/42 | RH. Dixon 306 | whole 6.8 0.17 Rondeau Park, Ont. 8/8/42 | C.C. Bell 61, | whole 11.5 0.68 Ottawa, saa’ 7/8/43 | Me Sutton 1621 | leaves 17.6 1.30 Ottawa, Ont.(X-2=-815) | 11/8/43 |M. Sutton 1636 | leaves 1604 1.00 Ottawa, Ont.(X-2=-803) | 13/8/43 | M. Sutton 1674, | leaves 12.8 1.10 Ottawa, Ont.(X-2-90) 13/8/43 | Me Sutton 1679 | leaves 13.8 1.20 Ottawa, Ont.(X-2-76) | 13/8/43 | M. Sutton 1688 | leaves 18.3 1.10 Ottawa, Ont. (X-2-92) 14/8/43 | Me Sutton 1723 | leaves w.1 1.50 Ottawa, Ont.(X-2-90) | 16/10/h2 | M.N. Zinck 1133 | stems, 502 0.12 flowers 1132 | leaves 78 0.78 Ottawa, Ont.(X-2-92) 16/10/42 | M.N. Zinck 1219 | leaves beh 0.50 1220 | stems, 326 0.15 flowers New Minas, N.S. 20/8/42 | RM. Lewis 696 | whole 10.5 0.33 Solidago gigantea Ait. var. leiophylla Fern. | Fort Sask., Alta. 29/6/42 |G.H. Turner 253 | leaves 16.1 0.39 252 | stems 91 0.18 Eastend, Sask. 2/8/42 | HS. Jones 1048 | whole 91 0.55 650} whole 8.6 0.37 713 | whole 768 0.26 Moose Jaw, Sask. 29/8/42 oy agree 877 | whole 705 0034 Ottawa, pacar 5/8/43 |M. Sutton 1608 | leaves 16.6 1.10 Ottawa, Ont.(39-16-41)| 7/8/43 | M. Sutton 1617 | leaves 17.1 1.40 Ottawa, Ont.(39-106- | 10/8/43 | M. Sutton 1627 | leaves 1604 1.40 143) Ottawa, Ont.(39-16-65)| 10/8/43 | M. Sutton 1624, | leaves 16.9 1.10 - 40 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Acetone Benzene Date Labe Part Scientific name Locality collected Collector No. analyzed ae ae, F gpaine) Solidago gigantea Ait. var. lelophylla Ottawa, Ont. (X-2-34) 11/8/43 | M. Sutton 1645 | leaves 1504 1.20 Fern. = Continued : Ottawa, Ont.(X-2-45) 12/8/43 | M. Sutton 1662 | leaves 16.1. 1.50 Ottawa, Ont. (X-2-65) 13/8/43 | M. Sutton 1698] leaves 15.3 1.60 Ottawa, Ont.(X-2-83) | 13/8/43 | M. Sutton 1690| leaves 10.8 1.20 Ottawa, Ont .(X-2-69) 14/8/43 | M. Sutton 1704 | leaves 16.0 1.60 Ottawa, Ont.(X-2-79) | 14/8/43 | M. Sutton 1715 | leaves 15.6 1.50 Ottawa, Ont.(X-2-86) | 14/8/43 | M. Sutton 1705 | leaves 4.7 1.10 Ottawa, Ont.(X-2-62=B)} 20/8/43 | M.N. Zinck 1765| leaves 15.9 1.00 Ottawa, Ont.(X-2-69) 21/8/43 | MN. Zinck 1767 | leaves 13.2 1.30 Ottawa, Ont.(39-100- 9/10/42 | M.N. Zinck 1032 | leaves, Fok 0.87 220) flowers 1031 | stems Bok 0.10 Ottawa, Ont.(39-16-44)} 9/10/42 | MeN. Zinck 1018 | leaves, 11.0 0.79 flowers 1017 | stems 3.8 0.07 Ottawa, Ont.(39-16-41)| 9/10/42] M.N. Zinck 1012 | leaves, 11.2 0.65 flowers 1011 | stems 5.0 0.16 Ottawa, Ont. (X-2-62) 16/10/42 | M.N. Zinck 1098 | leaves 1.6 1.55 1097 | stems, 4e5 OW flowers Ottawa, Ont.(X-2-65) 16/10/42 | M.N. Zinck 1137 | leaves 10.3 0.84 1138 | stems, 4.3 0.12 flowers Ottawa, Ont.(X-2-83) 16/10/42 | M.N. Zinck 1119 | leaves 7.7 1.34 1120 | stems, 326 0.16 flowers Ottawa, Ont.(X-2-86) | 16/10/42 |M.N. Zinck 1215 | leaves 6.5 0.60 1216 | stems 3.7 0.11 Ottawa, Ont.(X-2-69) 16/10/42 | M.N. Zinck 1236 | leaves 603 lAd 1237 | stems, 5.5 0.15 flowers Ottawa, Ont. (X=2-79) 16/10/42 | M.N. Zinck 1207 | leaves 767 1.60 1208 | stems 5.5 0.16 Ottawa, Ont.(X-2-34) | 16/10/42 | M.N. Zinck 1293 | leaves 8.6 1.27 1194 | stems 5.3 0.35 Ottawa, Ont .(X-2-45) | 16/10/42 | M.N. Zinck 1182 | leaves 75 1.15 1183 | stems, 6.1 0.19 flowers Ottawa, Ont.(X=2945) | 16/10/42 | M.N. Zinck 1168 | leaves 7.8 0.81 1169 | stems, 6.0 0.28 flowers Ottawa, Ont.(39-16-65) | 16/10/42 |M.N. Zinck 1075 | leaves 1 0.75 1074 | stans, 3.9 0.23 flowers Ottawa, Ont.(X-2-820) | 15/10/42 | M.N. Zinck 1071 | Leaves, 10.1 O.7h flowers = 21 Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours benzene for three hours - Continued. and followed by extraction with Scientific name Locality Ee oi oe Collector | tebe Pree o eeenaae | |< aeteect % dry wt. |% dry wt. 1070 | stems 323 0.13 Solidago glaberrima Martens Birtle, Man. 1/1/42 |MeG. Dudley 402 | whole 1423 0.16 Saskatoon, Sask. 13/7/42 |R.C. Russell 523 | whole 15.4 0.28 Craigmyle, Alta. 5/8/h2 A.H. Brinkman 519 | whole 14.8 0.16 Ottawa, Ont. (X-2-66) 12/8/43 | Me Sutton 1666 | leaves 15.5 1.10 Ottawa, Ont.(X-2-222) | 13/8/43 |M. Sutton 1676 | leaves 17.8 1.00 Ottawa, Ont.(X~2-221) | 14/8/43 {M. Sutton 1710 | leaves 16.3 1.40 Ottawa, Ont. (X-2-66) 16/10/42 |M.N. Zinck 1199 | leaves 115 1.58 1200 | stems, bok 0.16 flowers Ottawa, Ont.(X-2-222) | 16/10/42 |M.N. Zinck 1201 | leaves 1.3 0.73 1202 | stems, 6.6 0.19 flowers Ottawa, Ont.(X-2-221) | 16/10/42 |M.N. Zinck 1108 | leaves 12.8 1.22 1107 | stems, Teo2 ors Fs flowers Ottawa, Ont (39-16-57) | 7/8/43 |M. Sutton 1619 | leaves 16.3 0.51 Ottawa, Ont.(39-16-45) | 10/8/43 |M. Sutton 1629 |leaves 19.3 1.80 Solidago graminifolia (L.) Salisb. Harwich Twp., Ont. 26/8/42 |C.C. Bell 770 |shoots 8.6 O14 Beamsville, Ont. 3/9/h2 |F. Ransom 1035 | shoots 92 0.37 Crediton, Ont. 2/9/h2 |L.0. Gaiser 825 |whole 8.9 0.33 Ottawa, Ont. 9/10/42 |MeN. Zinck 1022 |leaves, 11.6 0.16 flowers 1021 | stems 3.0 0.05 Porter Point, N.S. 13/8/42 |R.M. Lewis 691 |whole 8.2 0.24 Solidago graminifolia (L.) Salisb. var. Fort Sask., Alta. 29/6/42 |G-H. Turner 255 |leaves 12.6 0226 camporum (Greene) Fern. 254 |stens 6.9 0.10 Ottawa, Ont.(X-2-72) 5/8/43 \M. Sutton 1609 |leaves 14.2 0.69 Ottawa, Ont.(X-2-38) | 11/8/43 |M. Sutton 1647 |leaves 16.1 0.97 Ottawa, Ont.(X-2-41) [12/8/43 {Me Sutton 1664 |leaves 15.8 0.95 Ottawa, Ont. (X-2-39) 21/8/43 |M.N. Zinck 1766 |leaves 16.5 0.63 Ottawa, Ont.(X-2-72) 9/10/42 M.N. Zinck 1020 papeebeic 1304 0.53 1019 |stems 3.5 0.10 Ottawa, Ont.(X=-2-41) |16/10/42 |M.N. Zinck 1147 |leaves 10.0 1.57 1148 |stems, 8.2 0.16 flowers Ottawa, Ont.(X-2-39) |16/10/42 |M.N. Zinck 1170 }leaves 9.5 1.46 1171 |stems 903 0.13 Ottawa, Ont.(X-2-38) [16/10/42 M.N. Zinck 1164 |leaves Boh 0.84 1165 |stems, 9.0 0.13 flowers Ottawa, Ont.(X-249) [16/10/42 M-N. Zinck 1117 |leaves 9.0 1.26 1118 |stems, 6.6 O14 flowers a hee Table 1. Resin and rubber content of plants determined by! extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Acetone Benzene Scientific name Locality ieee aa Collector i le q | extract, | extract, ee analyz % dry wte % dry wee Solidago graminifolia (L.) Salisb. var. Ottawa, Ont.(X-2-822) 5/8/43 | Me Sutton 1611 | leaves 19.8 0.83 nuttallii (Greene) Fern. Ottawa, Ont .(X-2-62) 11/8/43 | M. Sutton 1639 | leaves 17.8 1.00 Ottawa, Ont. (X-2-55) 12/8/43 | M. Sutton 1663 | leaves 16.6 0.64 Ottawa, Ont.(X-2=55) 21/8/43 | M.N. Zinck 1778 | leaves 16.4 0.95 Ottawa, Ont.(X-2-55) | 16/10/42 | M.N. Zinck 1187 | leaves 8.1 1.83 1188 | stems, 705 Ol, flowers Solidago hispida Muhl. Crediton, Ont. 7/9/42 | L.O. Gaiser 799 | whole 7.8 0.50 Ottawa, Ont.(39-41-55)| 11/8/43 | Me Sutton 1650] leaves 19.7 1.50 Solidago juncea Ait. Carleton Co., Ont. 10/7/42 | HeA. Senn, 214 | whole 12.9 0.25 M.N. Zinck, D.C. McIntosh Ottawa, Ont. 25/8/h2 | He Groh, 670 | whole 13.5 0.43 W.H. Minshall Crediton, Ont. 2/9/42 | L.0. Gaiser 797 | whole 10.7 0.41 New Minas, N.S. 28/8/42 | RM. Lewis 811 | whole 12.6 0.15 Solidago latifolia L. Kent Co., Mt. 1/9/42 | C.C. Bell 834, | whole 602 Oohd 835 | leaves 93 0.92 Beamsville, Ont. 13/9/42 | F. Ransom 1037 | whole 507 0.22 Ottawa, Ont. 2/10/42 | H. Groh 1309 | whole 6.9 0.31 Kentville, N.S. 20/8/42 |R.M. Lewis 698 | whole 9.1 0.19 Solidago lepida DC, Abbotsford, B.C. 2/7/42 | Dom. Ent. Lab. 576 | whole 909 0.16 Edmonton, Alta. 20/8/42 | M.W. Cormack 721 | whole 78 0.38 Ottawa, Ont .(39-79- 10/8/43 |M. Sutton 1631 | leaves 17.5 0.90 261-A) Ottawa, Ont.(X-2-804) | 13/8/43 |M. Sutton 1677 | leaves 19.7 1.20 Ottawa, Ont.(X-2-809) | 14/8/43 | M. Sutton 1703 | leaves 19.5 0.95 Ottawa, Ont.(X-2-796) | 14/8/43 |M. Sutton 1717 | leaves 17.9 0.58 Ottawa, Ont.(X-2-804) | 16/10/42 | M.N. Zinck 1191 | leaves 8.8 0.79 1192 | stems, 6.5 0.18 flowers Ottawa, Ont.(K-2-809) | 16/10/42 | M.N. Zinck 111, | leaves 10.5 0.89 1013 | stems, 8.0 0.03 flowers Ottawa, Ont.(X-2-796) | 16/10/42 |M.N. Zinck 1213 | leaves 10.2 0.65 121, | stems, 7.8 0.17 flowers Ottawa, baal ) 15/10/42 |M.N. Zinck 1073 | leaves 11.1 0.60 261-A 1072 | stems, 4d 0.084 flowers Ottawa, aa cast ) 15/10/42 |M.N. Zinck 1067 | leaves 1.6 0.19 261-B 1066 | stems 36h 0.02 Solidago lepida DC. var. elongata (Nutt. ) Fort Sask., Alta. 8/7/42 |G-H. Turner 312 | whole 902 0.26 .Fern. Quill Lake, Sask. 29/7/h2 |B.J. Sallans, 686 | whole 79 Ons R.C. Russell Armley, Sask. 20/8/42 |R.C. Russell 865 | whole 8.6 0.17 -43- Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Scientific name Locality Beit Collector ec acta an pai extract, ° % dry wt. 6 dry wt. Ottawa, Ont. (X-2-46) |: 12/8/43 | M. Sutton 1658] leaves 17.0 1.30 Ottawa, Ont.(X-2-42) 13/8/43 | M. Sutton 1696 | leaves 15.8 1.40 Ottawa, Ont.(X-2-59) 13/8/43 | M. Sutton 1684 | leaves 16.8 1.30 Ottawa, Ont.(X-6-767) | 13/8/43 | M. Sutton 1701 | leaves Wes 1.10 Ottawa, Ont.(X-2-94) | 14/8/43 | M. Sutton 1718 | leaves 15.5 1.30 Ottawa, Ont. (X-2-58) 14/8/43 | Me Sutton 1719 | leaves 14.8 0.92 Ottawa, Ont.(X-2-42) | 16/10/42 | M.N. Zinck 1156 | leaves 13.3 1.04 1157| stems, 77 0.10 flowers Ottawa, Ont.(X-2-46) | 16/10/42 | M-N. Zinck 1166 | leaves 12.6 1.54 1167} stems, 209 0.16 flowers Ottawa, Ont.(X-2-59) | 16/10/42 | M.N. Zinck 1145 | Leaves 8.9 1.27 1146 | stems, 6.0 0.15 flowers Ottawa, Ont. (X-2-58) 16/10/42 | MN. Zinck 1240 | leaves 965 1.20 1241 | stems, 6.8 015 flowers Ottawa, Ont.(X-2-767) | 16/10/42 | M.N. Zinck 1141 | leaves 8.5 0.34 1142 | stems, 3.3 0.06 flowers Ottawa, Ont .(X-2=94) 16/10/42 | MeN. Zinck 1205 | leaves 906 0.95 1206 | stems, 5.1 0.12 flowers Solidago lepida DC. var. fallax Fern. Dropmore, Man. ?/7/42 | Skinner Nursery 465 | whole Tok 0.24 Ottawa, Ont.(X-2-819) | 7/8/43 | M. Sutton 1620 | leaves 17.9 1.10 Ottawa, Ont. (X-2-31) 11/8/43 | Me Sutton 1637 | leaves 16.8 1.10 Ottawa, Ont.(X-2=29) 11/8/43 | M. Sutton 1643 | leaves 1525 0.97 Ottawa, Ont. (X-2-82) 13/8/43 | Me Sutton 1681 | leaves 13.5 1.60 Ottawa, Onte(X-2-63) | 13/8/43 |M. Sutton 1687 | leaves 16.8 1.50 Ottawa, Ont.(X-2-84) | 14/8/43 | M. Sutton 1708 | leaves 1704 0.88 Ottawa, Ont.(X-2-810) | 14/8/43 | M. Sutton 1712 | leaves 19.1 1.20 Ottawa, Ont.(X-2-89) | 14/8/43 | M. Sutton 171, | leaves 1562 1.30 Ottawa, Ont.(X-2-81) | 14/8/43 | M. Sutton 1720 | leaves 164 0.93 Ottawa, Ont. (X-2-88) U,/8/43 | M. Sutton 1721 | leaves 16.2 1.00 Ottawa, Ont.(X-2-82) 16/10/42 | MeN. Zinck 1121 | leaves 105 0.58 1122 | stems, 403 0.17 flowers . Ottawa, Ont. (X-2-29) 16/10/42 | M.N. Zinck 1092 | leaves 11.2 0.85 1091 | stems, 705 0.10 flowers Ottawa, Ont.(X-2-81) 16/10/42 | M.N. Zinck 1135 | leaves 8.9 1.17 1136] stems, 705 0.11 flowers Ottawa, Ont.(X-2-88) 16/10/42 | M.N. Zinek 1221] leaves 6.0 0.91 - bh = Table 1. Resin and rubber content of plants determined by extraction with acetme for six hours and followed by extraction with benzene for three hours ~ Continued. Selientific name Locality sda Collector ig gate ed pba cad % dry wt. |% dry wt. Solidago lepida DC. var. fallax Fern. - 1222 | stems, Tel 0.15 Continued flowers Ottawa, Ont.(X-2-89) | 16/10/42 | M.N. Zinck 1234 | leaves 9.6 0.53 1235 | stems, hed 0.25 flowers Ottawa, Ont. (X-2-82) 16/10/42 | MeN. Zinck 1232 | leaves Boh 1.99 1233 | stems, 6e1 0.11 flowers Ottawa, Ont.(X-2-800) | 16/10/42 | M-N. Zinck 1227 | leaves 6.2 Ook6 1228 | stems, 4.8 0.22 flowers Ottawa, Ont.(X-2-84) | 16/10/42 |M.N. Zinck 1242 | leaves 79 1.41 1243 | stems, 4.5 0.08 flowers Ottawa, Ont.(X-2-810) | 16/10/42 | M.N. Zinck 1244 | leaves 6.6 1.18 1245 | stems, 5.8 0.11 flowers Solidago missouriensis Nutt. Fort Sask., Alta. 9/7/42 | GH. Turner 308 | whole 11.7 0.27 Eastend, Sask. 7/8/42 | HS. Jones 648 | whole 13.7 0.29 7/8/42 | H.S. Jones 715 | whole Wel 0.31 7/9/42 |HS. Jones 1047 | whole 12.1 0.23 Morden, Man. 1/7/42 | H.H. Marshall 752 | whole 13.4 0.17 Ottawa, Ont.(X-2-799) | 13/8/43 | M. Sutton 1686 | leaves 16.9 0.53 Ottawa, Ont.(X-2-768) | 13/8/43 |M. Sutton 1694 | leaves 13.1 0.90 Ottawa, Ont.(X=2-799) | 16/10/42 | M.N. Zinck 1203 | leaves 10.3 0.43 Ottawa, Ont.(X-2-768) | 16/10/42 | M.N. Zinck 1185 | leaves 10.5 1.26 1186 | stems, 742 0.16 flowers Solidago mollis Bartl. Saskatoon, Sask. 4/8/42 |R.C. Russell 681 | whole 10.3 0.30 18/9/42 |R.C. Russell 1323 | whole 9.8 O41 Morden, Man. 1/7/42 | HeH. Marshall 751 | whole Tel 0.24 Solidago nemoralis Ait. Fort Sask., Alta. 20/7/42 |G.»He Turner 375 | whole 11.2 0.22 Ottawa, Ont. 25/8/42 |W.H. Minshall, 675 | whole UW.2 0.66 H. Groh Kent Cos, Ont. 7/9/42 | C.C. Bell 836 | whole 12.1 0.32 Crediton, Ont. 2/8/42 |L.0. Gaiser 798 | whole 705 0.32 Kent Co., Ont. 8/10/42 | C.C. Bell 1298 | whole 8.3 0.35 Bridgetown, N.S. 21/8/42 |R.M. Lewis 699 | whole Uye2 0.29 Solidago pruinosa Greene Stewart Valley, Sask. 1/9/42 | B.d. Sallans, 879 | whole 9.9 0.25 R.J. Ledingham Floral, Sask. 18/9/42 | R.C. Russell 1320 | whole 12.3 0.16 Solidago puberula Nutt. Ottawa, Ont.(40-41- 16/10/42 | M.Ne Zinck 1088 | leaves 6.2 0.36 i. s New Minas, N.S. 11/9/42 | RM. Lewis 1328 | whole 5.8 0.15 Solidago racemosa Greene var. gillmani Ottawa, Ont.(40-36-126) 11/8/43 |M. Sutton 1649 | leaves 18.8 0.84 aS Ottawa, Ont.(X-2-85) | 16/10/42 |M.N. Zinck 1223 | whole Bide 0.22 - 45 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six.hours and followed by extraction with benzene for three hours - Continued. Sclentific name Locality Date Collector algal Wiesel pee owe collected No, | analyzed & dry wt. | % dry wt» Solidago riddellii Frank Rondeau Park, Ont. 10/9/42 | C.C. Bell 842 | whole 10.8 0032 Ottawa, cee 10/8/43 | M. Sutton 1625 | leaves 1567 1.20 Solidago rigida L. Fort. Sask., Alta. 20/8/42 | G.H. Turner 373 | whole 10.6 0.20 Sclanders, Sask. 25/6/42 | B.C. Russell 297 | whole 9.1 0.13 Saskatoon, Sask. 7/8/42 | RL. Russell, 685 | whole 24 0.34 R.C. Russell Fastend, Sask. 1/8/42 | H.S. Jones 716 | whole 11.0 0.33 Morden, Man. 25/6/42 | HH. Marshall 743 | whole 79 0.13 Ottawa, cl 11/8/43 | M. Sutton 1648 | leaves 174 0.84 Ottawa, Ont.(X-2-32) 1/8/13 M. Sutton 1638 | leaves 16.8 0.77 Ottawa, Ont.(X-2-37) | 12/8/43 | M. Sutton 1659 | leaves 17.7 0.91 Ottawa, Ont.(X-2-807) | 13/8/43 | M. Sutton 1675 | leaves 15.0 1.20 Ottawa, Ont.(X=-2-807) | 15/10/42| M.N. Zinck 1226 | whole 365 0.27 Ottawa, Ont.(39-61- 15/10/42 | M.N. Zinck 1090 | leaves 79 0.53 wi 1089 | stems, 667 0.06 flowers Ottawa, Ont. (X-2-32) 15/10/42 | M.N. Zinek 1153 | whole 53 0.54 Ottawa, Ont.(X-2=37) | 15/10/42 | M.N. Zinck 1184 | leaves 5 oh 0.47 Solidago rugosa Mill. Ottawa, Ont. 3/6/42 | H. Groh 4] whole 10.4 0.28 Ottawa, Ont. 11/8/42 |H. Groh 548 | leaves We5 1.15 549 | stems, 70 O11 roots, flowers Kent Co., Ont. 27/9/42 | CC. Bell 1299 | whole 73 0.39 Cape Breton, N.S. 20/8/42 | J.P. MacMillan | 703 | whole Be2 0046 20/8/42 | J.P. MacMillan 702 eras 75 0.42 leaves King's Co., N.S. 13/8/h2 | RM. Lewis 690 | whole 10.8 0.23 Solidago rugosa Mill. var. villosa (Pursh) Kent Co., Ont. 1/9/42 | CC. Bell 84,0 | whole 58 0.26 Fons 841| leaves 8.5 0.90 Solidago sempervirens L. Ottawa, Ont.(40-17-62)} 11/8/43 | Me Sutton 1640 | leaves 164 0.60 Ottawa, Ont.(40-17-62)} 15/10/42 | M.N. Zinck 1094 | leaves 10.3 0.82 1093 | stems, TT O14 flowers Lunenburg Co., N.S. 12/7/h2 |M.N. Zinck 366 | whole 10.8 0.24 Oak Island, N.S. 12/7/42 | R.M. Lewis 627 | whole 8.1 0.24 Margaret's Bay, N.S. 6/8/42 | M.S. Brown 807 | whole 7.8 0.51 Chester, N.S. 1/10/42 | L.H. Zinek 1034 PN 46 0.51 heads 1033 stems 45 O15 New Minas, N.S. 27/7/42 | RM. Lewis 625 | whole 91 0.17 10/8/42 | R.M. Lewis 688 | whole 705 0.36 bbe and followed by extraction with Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours benzene for three hours - Continued. Scientific name Locality eueend ||) eetesten> |S ange ance an Solidago sempervirens L. - Continued 24/8/42 | R.Me Lewis 810 | whole 6.3 0.22 8/9/42 | RM. Levis 1324 | whole 7.3 0024 23/9/42 | RM. Lewis 1334 | whole 7.8 0.24 7/10/h2 | BM. Lewis 1332 | whole 9.8 0.28 21/10/42 | RM. Lewis 1351 | whole 9.0 0.34 6/11/42 | RM. Lewis 1350 | whole Tels 0.23 Solidago shortii T. & G. Ottawa, Ont.(39-16-66)| 7/8/43 | M. Sutton” 1622 | leaves 18.5 1.10 Ottawa, Ont. (X-2-33) 11/8/43 | M. Sutton 1644 | leaves 204 0.79 Solidago tenuifolia Pursh Ottawa, sare 10/8/43 | M. Sutton 1632 | leaves 17.9 0.61 Solidago uniligulata (DC.) Porter Yarmouth Co., N.S. 5/9/h2 | RM. Lewis 1326 | whole 13.9 0.21 Sonchus arvensis L. Vancouver, B.C. 23/6/42 | Je Davidson 188 | whole 10.7 0029 Pemberton, B.C. 10/8/42 | J. Ronayne 687 | shoots 76 0.28 Katepwa, Sask. 1/7/42 | LT. Carmichael | 270] whole 8.7 0.32 Saskatoon, Sask. 9/7/42 | RC. Russell 527 | whole 8.0 0.35 Fort Sask., Alta. 13/7/42 | GH. Turner 371 | whole 706 0.30 Morden, Mane 2/8/42 | HeH. Marshall 759 | whole 6.3 0.21 Ottawa, Ont. 3/6/42 | He Groh 7| whole 8.1 0.61 23/6/42 | He Groh 46| shoots 1.7 0.43 47 | roots eT 0.33 20/7/42 | He Groh 318 | whole 7.6 Oeh0 Crediton, Ont. 5/7/42 | L.O. Gaiser 437 | whole 12.0 0.54 Beamsville, Ont. 21/7/42 | F. Ransom 593 | whole 10.7 0.41 Morpeth, Ont. 27/7/42 | C.-C. Bell 495 | whole 99 0.35 Blenheim, Ont. 8/8/42 | He Millar 608 | shoots 91 O41 Fredericton, N.B. 21/7/42 | S.F. Clarkson, 859 | shoots 6.5 0.20 J.L. Howatt Wolfville, N.S. 22/6/42 | M.S. Brown 158 | whole 9.6 0.39 Kentville, N.S. 3/7/h2 | RM. Lewis 244 | shoots 9.3 0.39 Lunenburg Co., N.S. 12/7/42 | M.N. Zinck 369 | whole 8.7 0.42 Kentville, N.S. 16/7/42 | RM. Lewis 623 | whole 9.5 0.36 Halifax, N.S. 1/8/42 | M.S. Brown 819 | whole 8.2 0.36 Sonchus arvensis L. var. glabrescens Brooks, Alta. 12/8/42 | M.W. Cormack 720 | whole 5.8 0.38 (Guenther) Grab. & Wimm. Beamsville, Mt. 21/7/42 | F. Ransom 580 | whole 9.0 0.33 Winnipeg, Man. 4/8/42 | Ae Simpson 569 | whole 8.5 0.28 Eastend, Sask. 1/8/42 | HS. Jones 640 | whole 6.5 0.30 Sonchus asper (L.) Hill Saskatoon, Sask. 24/7/42 | R.C. Russell 537 | shoots ng 0.27 Morden, Man. 31/7/42 | HH. Marshall 755| whole 11.4 0.29 Beamsville, Ont. 21/7/42 | F. Ransom 590] shoots 9.5 0.23 Kent Co., Ont. 3/10/42| C.C. Bell 1301 | shoots 8.1 0.23 Ottawa, Ont. 23/6/42 | He Groh 49| shoots u.0 0.55 50} roots beh 0.32 -47 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours = Continued. Scientific name Locality collnveea | CoLlector sna ae = a oe % dry wt. | % dry wt. Wolfville, N.S. 22/6/42 |M. Brown 157 | whole 10.9 0.36 King's Co., N.S. 30/9/42 | RM. Lewis 1330 | whole 707 0.17 Sonchus oleraceus L. Lethbridge, Alta. 7/7/42 | JeJ- Sexamith 383 | whole 99 0.37 Regina, Sask. 5/7/42 | L.T. Carmichael 271 | whole 11.6 0.17 Morpeth, Ont. 27/7/42 | C.C. Bell 493 | whole 8.1 0.38 Westboro, Ont. 10/8/42 | He. Groh 540 | whole 703 0.21 Fredericton, N.B. 30/6/42 | M.B. Moore, 854 | whole 6.5 0.12 S.F. Clarkson 8/7/42 | L.W. Howatt 856 | whole bok 0.14 Stachys palustris L. Farm Point, Que. 9/7/42 |G. Anderson 203 | shoots 2.9 0.27 204 | roots 6.5 0.15 Tanacetum vulgare L. Ottawa, Ont. 5/8/42 | HA. Senn 485 | Leaves 12.6 1.07 486 | stems, 6.0 0.13 flowers Taraxacum laevigatum (Willd.) DC,: Fort Sask., Alta. 29/6/42 |G.H. Turner 219 | whole 99 0.32 Taraxacum palustre (Lyons) Lam. & DC. var. Fort Sask., Alta. 29/6/42 |G.H. Turner 220 | shoots wY4.9 0.37 vulgare (Lam.) Fern. 221 | roots 76 0.50 Saskatoon, Sask. 15/6/h2 | ReC. Russell 288 | whole 13.2 0.38 Regina, Sask. 3/7/42 | LeT.e Carmichael 273 | whole 8.8 0.25 Eastend, Sask. 1/7/42 | H.-S. Jones 280 | whole 5.8 0029 281 | leaves, 10.8 0.37 flowers 282 | roots Tel 0.31 30/7/42 | R.A. Wilkinson 556 | whole Tee 0.29 Morden, Man. 26/6/42 | HH. Marshall 74,6 | whole hed 0.21 Beamsville, Ont. 7/7/42 =| F. Ransom 585 | whole 10.1 0.28 Kent Co., Ont. 8/8/42 | C.C. Bell 629 | whole 6.3 O45 Ottawa, Ont. 23/6/42 | He Groh 43 | whole 8.8 0.42 44 | flowers Bah 0.26 45 | roots 305 0.32 Wolfville, N.S. 17/6/42 |B.M. Lewis 77 | whole Tel 0.38 Tradescantia virginiana L. Cooksville, Ont. 20/7/42 | C.H. Radford 320 | whole 18.8 0.31 Tragopogon dubius Scop. Summerland, B.C. 15/6/42 | G.E. Woolliams 135 | whole 11.8 0.22 Vancouver, B.C. 23/6/42 | J. Davidson 180 | whole 11.8 0.21 Summerland, B.C. 30/6/42 | G.E. Woolliams 238 | whole 12.0 0.15 Westbank, B.C. 4/7/42 |G. Stevenson 510 | whole 12.6 0.14 Summerland, B.C. 13/7/42 | G.E. Woolliams 468 | whole 10.5 0.12 Creston, B.C. 1/7/42 | W.S. Cameron 539 | whole 12.4 0.15 Summerland, B.C. 3/8/42 | G.E. Woolliams 599 | whole 10.1 0.09 Ft. Sask., Alta. 15/7/42 |G.H. Turner 372 | whole 10.6 0.20 Calgary, Alta. 5/8/h2 | W.A. Hagborg 518 | whole 10.7 0.17 Saskatoon, Sask. 22/6/42 | RC. Russell 289 | whole 18.0 0.17 - 48 - Table 1. Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. one Benz Scientific name Locality collected} Collector —| abe Peta cane, en Tragopogon dubius Scop. - Continued Katepwa, Sask. 1/7/42 | LeT. Carmichael 2721 whole 11.8 0.18 Eastend, Sask. 30/7/42 | ReAe Wilkinson 559 | whole 43 0.17 1/7/42 | HS. Jones 285| whole 12.8 0.27 1/8/42 | He. Jones 638| whole 9.8 0.18 1/8/42 | H.S. Jones 644 | whole 89 0.19 Killarney, Man. 14/7/42 | B. Peturson, 305 | whole 11.5 0.15 W.A. Hagborg Kent Co., Ont. 18/9/42 | C.C. Bell 1302 | shoots 8.6 0.22 Ottawa, Ont. 24/8/42 | M.Ne Zinck 1799 | leaves 20.0 0.42 24/8/42 | M.N. Zinck 1794} leaves 18.7 0.48 Tragopogon porrifolius L. Vancouver, B.C. 23/6/42 | J. Davidson 179 | whole Joh 0.21 Beamsville, Ont. 7/7/42 | F. Ransom 594 | shoots 902 0.26 Kitchener, Ont. 4/8/42 | F.H. Montgomery | 1056| whole 8.7 0.07 Fort Frances, Ont. 1/8/42 | A. Cramg 710| roots 8.7 0.31 Preston, Ont. 2/9/42 | He Groh 773 | whole 6.8 0.11 Ottawa, Ont. 24/8/43 | M.N. Zinck 1801 | leaves 14.3 0.63 Ottawa, Ont. 24/8/43 | M.N. Zinck 1793 | leaves 13.7 0.64 Tragopogon pratensis L. Summerland, B.C. 17/8/42 | G.E. Woolliams 726} whole 10.8 0.20 31/8/42 | G.E. Woolliams 830| whole 9.5 0.17 Strathmore, Alta. 4/7/42 | JeJe Sexemith 385 | whole 12.2 0.20 Macleod, Alte. 1/7/42 | R.H. Dixon 229 | whole 10.4 0.19 Brant Co., Ont. 1/6/42 | A.M. Baer 140 | shoots 604 0.21 Brantford, Ont. 1/7/42 | Fe Luck 335 | whole 702 0.27 Kitchener, Ont. 4/8/42 | F.H. Montgomery | 1057] whole 6.8 0.13 Ottawa, Ont. 6/6/42 | HA. Senn 10 | shoots 9.8 0.23 11 | roots 12.0 0.30 9/6/42 |H. Groh 14 | shoots 8.2 0.27 17 | roots 0 0.47 Ottawa, Ont. 11/6/42 |W.H. Minshall 25 | shoots 8.9 0.22 26 | roots 13.3 0.40 Ottawa, Ont. 6/8/42 |W.H. Minshall 501 | whole 7.5 0.22 6/8/42 |W.H. Minshall 502 | whole 11.2 0.22 24/8/43 |M.N. Zinck 1792 | leaves 15.9 0.39 24/8/43 | MN. Zinck 1800 | leaves 17.6 0.47 Quebec, Que. 1/6/42 | 0. Caron 232 | whole Fok 0.21 Torryburn, N.B. 6/7/42 | J.L. Howatt, 855 | whole 606 0.08 S.F. Clarkson Wolfville, N.S. 16/6/42 |M.S. Brown 70 | shoots 10.4 0.19 Kentville, N.S. 17/6/42 | RM. Lewis 80 | shoots 1.1 0.24 Typha latifolia L. Westboro, Ont. 2/7/h2 |M.N. Zinck 153 | shoots 10.0 0.28 Urtica procera Muhl. Ottawa, Ont. 15/8/42 |H. Groh 571 | whole 12.5 002k Verbascum nigrum L. Ottawa, Ont. 29/6/42 | D.C. McIntosh 94 | shoots 13.7 0.20 - 49 = Table 1, Resin and rubber content of plants determined by extraction with acetone for six hours and followed by extraction with benzene for three hours - Continued. Acetone Benzene Selentific name Locality kent ccd Collector hie eae riatt, extract, lo. | analyz % dry wt. |% dry wt. 95] roots 10.0 0.13 Verbascum thapsus L. Ottawa, Ont. 5/8/42 | HA. Senn 473 | leaves 18.1 0.19 47h, | stems, 13.4 0.20 flowers 13/8/42 |H. Groh 554. | whole 11.6 0.20 Vinca minor L. Ottawa, Ont. 7/7/42 | HeA. Senn, 160 | whole 19.6 0.71 D.C. McIntosh. Digby Co., N.S. 16/9/h2 | RM. Lewis 1333 | whole 10.5 0.36 = 50 & Table 2. Effect of long and short extraction periods on the amount of acetone and benzene extracts obtained from plant material Lab Acetone extract, | Benzene extract, Plant i % dry wt. % dry wt. 6 hrs. | 20 hrs.} 3 hrs.| 20 hrs. Apocynum androsaemifolium L. 828 1304 2269 0.61 0.96 822 18.9 23.2 1.18 1.35 918 21.5 29 6 2.09 2.40 909 333 33.8 0.94 0.84 1483 32.3 3302 1.61 1.95 1488 30.3 32.4 1.67 1.85 Apocynum cannabinum L. TTS 12.2 16.4 1.13 1.15 oe var. 555 15.6 18.5 0.66 0.58 Apocynum sibiricum Jacq. 419 221 23.1 1.35 1.40 513 20.4 | 23.5 1.31 | 1.40 Apocynum sibiricum Jacq. var. 509 12.6 15.1 0.71 0.76 salignum (Greene) Fern. Asclepias incarnata L. 903 21.1 2543 1.10 1.03 1502 16.9 20.7 1.82 1.25 782 18.4 22.3 1.30 1.30 659 18.4 21.5 0.57 0.53 927 16.1 249 0.98 1.00 928 8.9 U3 0.08 0.11 929 18.2 26.3 0.79 1.20 963 16.6 27.6 0.76 0.91 1004 16.9 256k 0.69 0.87 201 23.0 27.0 0.89 0.75 Asclepias incarnata L. var. pulchra 978 17.9 25.0 1.18 1.55 (Ehrh.) Pers. Asclepias speciosa Torr. 595 10.3 11.3 0.95 1.03 oS Table 2. Effect of long and short extraction periods on the amount of acetone and benzene extracts obtained from plant material - Continued Acetone extract,| Benzene extract, Plant rey % dry wt. % dry wt. 6 hrs. | 20 hrs.| 3 hrs. | 20 hrs. 728 11.0 13.6 0.91 0.90 816 10.0 18.3 0.87 0.93 Asclepias syriaca L. 1499 15.5 22.6 0.96 1.20 1508 12.8 17.0 2634 2075 902 16.1 20.5 1.30 1635 911 13.7 18.2 1.75 1.55 915 14.5 17.5 2.10 1.95 1478 Wh 21.5 2.20 2240 1490 11.7 17.6 1.90 2220 40 WY9 20.8 0075 0.68 566 15.4 17.6 1.81 2.05 763 11.9 16.1 1.90 2210 961 12.5 21.8 1.06 1.25 504 16.8 21.0 2.82 2.70 506 15.0 17.8 1.48 1.55 Asclepias tuberosa L. 730 13.6 15.6 1.16 1.25 Campanula betonicaefolia Sibth. & Sm. 113 13.5 15.8 0.66 0.80 Campanula carpatica Jacq. 128 lel 12.1 0.80 1.08 Campanula latifolia L. 58 23.8 27.8 0.58 0.57 124 905 10.0 0.66 0.86 Campanula rapunculoides L. i2L 9.8 10.7 0.75 0.80 Campanula trachelium L. 118 10.8 1.8 0.68 0.87 120 12.0 13 04 0.76 | 0.96 Chrysothamnus nauseosus (Pall.) Britt. 138 3.6 43 0.67 0.50 var. speciosus (Nutt.) Hall. a Ses Table 2. Effect of long and short extraction periods on the amount of acetone and benzene extracts obtained from plant material - Continued Acetone extract, Benzene extract, ee 7g % dry wt. % dry wt. 6 hrs.| 20 hrs.| 3 hrs.| 20 hrs, 725 20.1 22.6 0.55 0.52 833 365 4.8 0.54 0.52 Euonyms alata (Thunb.) Sieb. 1368 9.2 n.3 0.97 1.10 345 13.9 15.5 1.19 1.30 Euonymas europaea L. 329 14.2 16.5 1.20 1.15 349 12.9 14.7 1.27 1.25 355 12.4 16.2 1.21 1.15 Euonymus maackii Rupr. 1357 9 13.3 0.82 1.50 1358 9.1 11.2 0.87 1.20 357 13 4 14.8 1.33 1.30 Euonymus radicans Sieb. 1382 48 6.1 1.01 1.20 Euonymus radicans Sieb. var. argentea 1377 13.1 15.1 1.09 1.50 Euonymus yedoensis Koehne 952 15.8 19.2 2.69 3.00 951 92 10.8 0.76 0.96 Euonymus yedoensis Koehne var. 347 14.7 17.4 1.19 1.35 koehneana Loes. Lactuca biennis (Moench) Fern. 886 Tel. 18.9 0.63 1.90 Lactuca pulchella (Pursh.) DC. 307 10.6 10.9 0.76 2230 27h 12.5 12.2 0.69 2.85 525 10.7 12.8 0.70 2075 757 10.1 11.6 0.60 2205 Lactuca sativa L. var. crispa L. 636 12.6 16.9 0.64 2045 Lonicera alpigena L. 439 252 26.9 0.86 0.77 Lonicera amoena Zab. LL 38.3 3542 0.94 1.05 Lonicera ruprechtiana Req. 443 26.7 25k 1.06 1.05 s os J oe Table 2. Effect of long and short extraction periods on the amount of acetone and benzene extracts obtained from plant material - Continued Acetone extract,| Benzene extract, Lab. % dry wt. % dry whe Plant No. 6 hrs. | 20 hrs.| 3 hrs. | 20 hrs. AL5 30.1 34.8 1.33 1.15 Lonicera tatarica L. Akl 39 5 42.0 0.89 0.76 453 25.8 29.0 1.18 1.05 Solidago altissima L. 891 14.6 19.7 1.18 1.30 Solidago canadensis L. 1172 Fok 12.3 1.99 1.85 Solidago gigantea Ait. var. 1098 11.6 13.1 1.55 1.80 leiophylla Fern. Solidago glaberrima Martens 1108 12.8 15.0 1.22 1.40 Solidago graminifolia (L.) Salisb. var. 1162 11.5 14.5 1.50 1.30 camporum (Greene) Fern. 1147 10.0 13.1 1.57 1.50 1170 9.5 11.6 1.46 1.60 Solidago graminifolia (L.) Salisb. var. 1187 8.1 10.9 1.83 1.75 nuttallii (Greene) Fern. Solidago latifolia L. 835 923 11.2 0.92 0.95 Solidago lepida DC. var. elongata (Nutt.)} 1166 12.6 15.6 1.54 1.60 Fern. Solidago rugosa Mill. var. villosa 8hl 8.5 11.9 0.90 0.69 (Pursh.) Fern.