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LIBRARY OF THE

UNIVERSITY OF ILLINOIS

AT URBANA-CHAMPAIGN

FIELD MUSEUM OF NATURAL HISTORY.
PUBLICATION 172.

l>K,s.

BOTANICAL SERIES. VOL. II, No. 9.

I. THE GENERA PEDILANTHUS AND
CUBANTHUS, AND OTHER AMER-
ICAN EUPHORBIACEAE

BY

CHARLES FREDERICK MILLSPAUGH.

II. TWO NEW STONECROPS FROM
GUATEMALA

BY

RAYMOND HAMET.

CHARLES FREDERICK MILLSPAUGH,
Curator, Department of Botany.

CHICAGO, U. S. A.
December, 1913.

ISSUED, D 30-1913.

UBftAHV

OF THE

UmVEJttlTY OF ILLINOIS

JO U .

I.— THE GENERA PEDILANTHUS AND CUBANTHUS
AND OTHER AMERICAN EUPHORBIACEAE.

By CHAS. F. M1LLSPAUGH.

PEDILANTHUS Neck.

Tithymaloides Tourn. Inst., 654. 1700.

Euphorbia sp. Linn. Sp. PL, 453. 1753.

Pedilanthus Neck. Elem. Bot., 2:354. 1790.

Ventenatia Tratt. Gen. PI. Disp., 87. 1802.

Crepidaria Haw. Succ., 136. 1812.

Hexadenia Kl. & Gke. Tricocc., 19. 1849.

Diadenaria Kl. & Gke. ibid.

Involucres oblique, shoe-shaped, on a slender peduncle; the tube
more or less fissured superiorly and notched inferiorly at the bilabiate
apex or throat, with two lateral and one median accessory lobes more
or less closing the fissure, the tube bearing an appendix on the superior
aspect of its posterior extremity. Appendix gibbous and interiorly
glandular posteriorly, its lip notched or 2-3-lobed and extending ante-
riorly above.the posterior end of the superior fissure of the tube. Flowers
pedicellate, the male numerous, ecalyculate, sometimes with linear
bracteoles at the base; female single with a long style, finally protruding
and generally declinate from the throat of the tube, stigmas 3, long con-
nate, often separate at the apex and frequently bi-lobed. Seeds ecarun-
culate. Leaves with the midrib thickened and often keeled beneath.

Tropical American and Madagascarian shrubs with fleshy branches
and milky juice, alternate leaves, glandular stipules if any, opposite
floral leaves and cymose terminal or upper-axillary involucres.
Type species: Euphorbia tithymaloides Linn.

§£[/ PEDILANTHUS: Involucres more or less horizontal, the tube
long-fissured above, shallowly notched below, 5-lobed, the two main
lobes much broader, the two lateral small and more or less connate
with the main lobes along their fissural margin, the fifth lobe partially
connate with the base of the lateral lobes or sometimes entirely free.
Appendix 1-2 or 3-lobed anteriorly, the saccate posterior portion sep-
arated from the floral cavity of the tube and including 2-6 small, ver-
rucose glands. Stems with a small stipular gland on each side of the
leaf attachment.

353

354 FIELD MUSEUM or NATURAL HISTORY — BOTANY, VOL. II

KEY

INVOLUCRE SHOE-SHAPED. Appendix smaller than the tube.
Lobe of the appendix entire:

Tube glabrous without and within:

Male and female pedicels hairy I retusus

Male pedicels hairy, female glabrous:

Appendix one third the length of the tube:

Lobe hairy-margined 2 tithymaloides

Lobe not hairy-margined 3 Deamii

Appendix one half the length of the tube 4 jamaicensis

Male and female pedicels glabrous:

Leaves glabrous 5 parasiticus

Leaves pubescent:

Bracts minute, cuculliform, style 6-toothed 6 Pringlei

Bracts large, foliacepus; style 3-lobed 7 Smallii

Tube glabrous without, hairy within 8 padifolius

Tube pubescent without, glabrous within:

Bractlets longer than the peduncles 9 angustifolius

Bractlets half the length of the peduncles, or less:

Male and female pedicels puberulent throughout 10 bahamensis

Male and female pedicels puberulent above 1 1 Fendleri

Male pedicels glabrous, female pubescent at base 12 Grisebachii

Lobe of the appendix bipartite:

Colored floral bracts conspicuous: exceeding the inflorescence:
Involucral tube glabrous:

Glands of the appendix 2 13 articulatus

Glands of the appendix 4 14 bracteatus

Involucral tube puberulent:

Capsule cornuate 15 spectabilis

Capsule not cornuate:

Male and female pedicels glabrous:

Lobes of the appendix laterally compressed:

Lobes glabrous 16 Greggii

Lobes puberulent 17 Olsson-Sefferi

Lateral and fifth lobes of the tube flabellate 18 involucratus

Lateral and fifth lobes of the tube linear 19 rubescens

Male pedicels glabrous, female pubescent:

Filaments and anthers glabrous 20 Palmeri

Filaments and anthers pubescent 21 tomentellus

Involucral tube hairy 22 Pavonis

Colored floral bracts not exceeding the inflorescence:

Bracts the length of the peduncles 23 macradenius

Colored floral bracts wanting:

Peduncle posteriorly affixed to the tube:

Appendix projected along the margin of the fissure:

Peduncles glabrous 24 (Erstedi

Peduncles puberulous 25 aphyllus

Appendix not projected along the margin of the fissure:

Tube glabrous within 26 nodiflorus

Tube hairy within 27 cymbiferus

Peduncle centrally affixed to the tube 28 macrocarpus

Lobe of the appendix tripartite:

Two of the divisions superior, one inferior 29 peritropoides

All three divisions on one plane 30 Itzaeus

INVOLUCRE HOOD-SHAPED. Appendix larger than the tube 31 Finkii

DEC., 1913. EUPHORBIACE.E— MILLSPAUGH 355

1. PEDILANTHUS RETUSUS Benth. in Hook. Jour, and Kew Misc., 6:321.
1854.

Shrubby 9 dm.-i.5o m.: leaves glabrous, ovate, 3.8-5 cm. long,
2.5 cm. broad, subsessile, oblique, cuneate at the base, retuse, lightly
keeled beneath. Cymes terminal and upper axillary, short. Involucres
7-8 mm. long: tube glabrous, thrice as long as the appendix; male and
female pedicels hairy; appendix lobe entire, truncate, thickened (glandu-
lar sic.) slightly below the apex, 4-glandular. Capsule large, rotund;
seeds subcarinate on the dorsum.

Differs from P. tithymaloides in the shape of the leaves, the hairy
female pedicel, smaller involucres, and the lip of the appendix being
thickened at the apex.
Type locality: COLOMBIA, Barra, Rio Negro, Spruce 1469. Type in

herb. Boissier, Geneva.
Distribution: VENEZUELA, Margarita Island, Johnson 59.

2. PEDILANTHUS TITHYMALOIDES (L.) Poit. An. Mus. Paris, 19:390.
1812.

Tithymaloides myrtifolius Curassavicus Commel. Hort., t. 16. 1706.
Euphorbia tithymaloides Linn. Hort. Cliff., 198. 1737: Sp. PL, 453.

1753-

Euphorbia myrtifolia Lam. Diet., 2:419. 1786.

Crepidaria myrtifolia Haw. PI. Succ., 136. 1812.

Euphorbia carinata Don. Hort. Cantab., Ed. 9:195. 1819.

Euphorbia canaliculata Lodd. Bot. Cab., t. 727. 1822.

Pedilanthus canaliculatus Sweet, Hort. Brit., ed. 1:355. 1827.

Pedilanthus myrtifolius Lk. Hort. Bot. Berol., 2:18. 1833.

Pedilanthus carinata Raf. Fl. Tell., 4:117. 1836.

Pedilanthus myrsifolius Raf. loc. cit.

Shrubby 1.20-1.80 m.; leaves glabrous, subsessile, cuneate at the
base, ovate or oblong, 3.5-7.5 cm. long, apex acute often recurved, mar-
gin subundulate, the mid-vein often prominently undulate-carinate
beneath. Cymes terminal, dense; floral leaves ovate, long-acuminate,
slightly longer than the peduncles, early deciduous. Involucres purple,
1.1-1.3 mm. long; tube thin, smooth. Appendix 4-glandular, the lobe
linear, short. Male pedicels hairy, female glabrous. Style shortly
bifid. Capsule 7.5 mm. long, 9 mm. broad, truncate at base and apex,
coccas keeled; seeds ovate, 5 mm. long.
Type locality: CURACAO.
Distribution: VENEZUELA, Lyon; Gollmer. COLOMBIA, Holton; H. H.

Smith 1295. GUATEMALA, 2072, 6764 John Donnell-Smith; 5011

356 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

Shannon. HONDURAS, 5467 Thieme. MEXICO, Nickels. CUBA,
de la Ossa; de la Sagra; Wright, Britton, Britton &* Co-well 12512;
Combs 498. SANTO DOMINGO, Poiteau. PORTO Rico, Sintenis
3698, 5717; Mr. &° Mrs. Heller 34; Millspaugh 157. FLORIDA, Brit-
ton 281. BAHAMAS, Brace 4144; Britton & Millspaugh 5791. ST.
CROIX, Ricksecker. MONTSERRAT, Shafer 216. BARBADOS, Dash
631. GRENADA, Broadway.

Illustrations: Commel. Hort., t. 91; Jacq. Amer., t. 92; Descourt. Ant.,
t. 116. Bo't. Cab., t. 727; Bot. Reg., t. 837; Bot. Mag., t. 2514.

3. Pedilanthus Deamii Millsp. sp. nov.

Shrubby; branches smooth, leafy above, naked below, young leafy
branchlets tomentose. Leaves thin, sessile, ovate to suborbicular,
inaequilateral, acute, narrowed to the base, crispidulous-puberulous on
both surfaces, 4.5-6 cm. long, 2.5-3.5 cm- wide, midrib prominent
beneath. Cymes nodal, simply bi-cephalic or cymose-bicephalic;
bracts small (one fourth the length of the peduncles), cucullate, tomen-
tose; peduncles smooth, 5-6 mm.; involucres small and slender, 1.2 x
.3 cm.; tube walls very thin, lower notch shallow, upper fissure extend-
ing to the appendix, few-ciliate at the posterior third, principal lobes
ovate, erose-dentate, few-ciliate in the sulcus, lateral lobes ligulate, one
third free, the apices slightly rounded-truncate, ciliate. Appendix
small, less than one third the length of the tube, the lip ligulate, trun-
cate, retuse; glands 4, scutelliform. Male pedicels hairy at the apex,
filaments hairy; female pedicel glabrous; style slender, slightly 3-lobed
at the apex. Capsule smooth, strongly 3-coccous; seeds grayish-olive,
subcylindric, apiculate, 3.8 x 2.5 mm., irregularly and minutely mottled.
Type locality: GUATEMALA, Fiscal, in ravines, alt. 3700 ft.; May 31,

1901, Chas. C. Beam 6081. Type in herb. Field Museum of Natural

History, Chicago, sheet No. 247.005.
Distribution: Known only from the type.

4. Pedilanthus jamaicensis Millsp. & Britton. sp. nov.

Shrubby, 4 dm. high; branches tenuous, glabrous. Leaves short
petioled (5 mm.), minutely and sparsely puberulous, oblong to ovate,
3-10 cm. long, narrowed to the petiole, apex blunt. Cymes nodal;
involucres i cm. x 4 mm.; tube- walls thin, the superior fissure open
back to the appendix, inferior notch about one fourth the length of the
tube; main lobes ovate, the lateral rectangular-oblong, one half free, all
fimbrio-ciliate ; male flowers long-exserted, filament one quarter the
length of the glabrous pedicel; female pedicel glabrous; style minutely
3 -forked at the apex the lobes 2 -cleft. Appendix about one half the

DEC., 1913. . EUPHORBIACE.E — MILLSPAUGH 357

length of the tube, lobe deltoid-ligulate, notched at the truncate apex,
ciliate-margined; glands 4, small, scutellate, thin.

Type locality: JAMAICA, Negril vicinity, March, 1908, N. L. Britton &•
Arthur Hollick, 2067. Type in herb. New York Botanical Garden.
Distribution: JAMAICA, Harris 10.238.

5. PEDiLANTHUSPARAsmcus'Kl.&Gke. (necBoiss.). Tricocc., 105. 1859.

Euphorbia parasitica Pavon in herb.

Pedilanthus ramosissimus Boiss. in D. C. Prodr., 15:5. 1862.

Shrubby, stem 15.3 cm., alternately and repeatedly short-branched;
branches as thick as a goose quill. Leaves sessile, rotund or subcordate
at the base, somewhat crisp-puberulent beneath, undulate, the larger
2.5 cm. Cymes at the apex of the attenuate floral branchlets which are
1.3-1.8 cm. long, 1.5-2 cm. diameter, capitate, densely many in volucred;
leaves of the inflorescence ovate-oblong, acute, deciduous; involucres
small, 7-1 1 mm. (8 x 4 mm.) long, the tube glabrous, its main lobes
broadly rounded, ciliate, the superior fissure two thirds the length of
the tube; inferior notch deep; lateral lobes short; oblong, one third free
at their rounded, ciliate apex; fifth lobe ligulate-spatulate, free to the
base, rounded and entire at the ciliate apex; male and female pedicels
glabrous. Appendix one third the length of the tube, its lip ligulate-
deltoid, retuse; glands 2; large, shaped like a ruptured anther, stipitate.
Type locality: MEXICO, Ruiz &° Pavon. Type (visa) in herb. Boissier,

Geneva.

6. PEDILANTHUS PRINGLEI Robinson, Proc. Amer. Acad., 29:322.
1894.

Shrubby, 1.20-1.50 m. ; stems smooth, alternately few branched.
Leaves softly and closely puberulent on both surfaces, lanceolate,
acuminate, 3.8-5.1 cm. long, subsessile by an abruptly narrowed base,
midrib white and prominently keeled beneath. Cymes terminal;
bracts minute, grayish-tomentose, caducous; peduncles 2.5-5 mm. long;
involucres acutish at the base, dark purplish-red, 1 1 mm. long, glabrous
without and within ; tube : the lobes ^finely ciliated on the free margins ;
male pedicels and filaments glabrous, female pedicel glabrous; style
slender, dark-red, trifid. Appendix 4-glandular, glabrous, abruptly
bent, attenuate to a very narrow, truncate, entire or slightly retuse apex.
Capsule smooth, 6.5-7 mm- in length, upon a stipe 13 mm. long; seeds
ashen, ovoid, apiculate.

Type locality: MEXICO, limestone ledges at La Palmas, San Luis
Potosi, July 25, 1891, Cyrus G. Pringle 5107. Type (visa) in herb.

Gray, Cambridge, Mass.

358 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

Distribution: MEXICO, Oaxaca, Pringle 6043; Nelson 1682; C&c. & Ed.
Seler 1682; Tomellin, Conzatti 1672; Salina Cruz, Deam 119. GUATE-
MALA, Gualan, Deam 234.

7. Pedilanthus Smallii Millsp. sp. nov.

Shrubby, 2 m. high, profusely branching, the branches and branch-
lets more or less zig-zag (in the type very sharply and strongly so),
branchlets slender, stipular glands plainly evident. Leaves densely
crisp-puberulent when young, pubescent when developed, sessile,
ovate-lanceolate to ovate, acute, the mid-rib inconspicuously keeled
beneath. Inflorescence terminal on the young branchlets; bracts foli-
aceous, exceeding the peduncles, ovate-lanceolate, attenuate at the
apex, crisp-pilose; involucres salmon to pink, glabrous without and
within, i cm. x 4 mm., superior fissure open to the appendix, inferior
cleft shallow; main lobes of the tube ovate, rounded and cilia to-fimbriate
on the margin, strongly folded into a plait along the margin of the fis-
sure; lateral lobes free only at their rounded apices; fifth lobe free
throughout, narrowly ligulate, obtuse. Male and female pedicels
glabrous; male flowers about 10; style deeply 3-lobed. Appendix one
third the length of the tube; lobe deltoid, not ciliate margined, retuse,
strongly marked by a longitudinal channel as if nearing bilobation (in
fact in one flower it was found to be deeply bilobed) ; glands 4, in pairs
the outer pair minute. Fruit unknown.
Type locality: FLORIDA, in pine lands near Miami; John K. Small

2286, November, 1904. Type in the herbarium of the New York

Botanical Garden. Full size photograph in herb. Field Museum.
Distribution: BERMUDA, at Castle Point, Brown & Britton, 820,

September, 1912.

8. PEDILANTHUS PADIFOLIUS (L.) Poit. An. Mus. Paris, 19:391. 1812.
Tithymaloides laurocerasi folio Dillen. Elth., t. 288. 1732.
Euphorbia tithymaloides padifolia Linn. Sp. PL, 453. 1753.
Euphorbia anacampseroides Lam. Diet., 2:420. 1786.
Pedilanthus anacampseroides Kl. & Gke. Tricocc., 106. 1859.
Shrubby. Leaves glabrous, 9-12x3-5 cm., subsessile, cuneate at

the base, oblong-ovate, obtuse or retuse, keeled beneath. Cymes
terminal, open; floral leaves ovate, acute; involucres large, sarcous,
hairy within, 1.2 cm. long; tube with the lateral lobes all spatulate and
one third connate ; male and female peduncles hairy ; style entire at the
apex the stigma tic point slightly marked with three shallow sulci.
Capsule "the size of a hazel nut."
Type locality: ANTTLLEAN ISLANDS, Plumier.

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 359

Distribution: ANTILLEAN ISLANDS, Descourtils. SANTO DOMINGO,
Schomburgk 168. ST. CROIX, Ricksecker 181; Mrs. Ricksecker 165.
ST. KITTS, Britton & Cowell 256.

Illustrations: Descourt. Ant., t. 117; Dillen. Elth., t. 288; Bot. Reg., t.
837; Bot. Mag., t. 254.

9. PEDILANTHUS ANGUSTIFOLIUS Poit. An. Mus. Paris, 19:393, t. 19.
1812.

Crepidaria subcarinata Haw. Rev. PI. Succ., 61. 1821.

Crepidaria cordellata Haw. Rev. PI. Succ., 136. 1821.

Euphorbia cordellata Haw. Misc. Natur., 185.

Pedilanthus cordatus Spr. Syst., 3:802.

Pedilanthus cordellatus. Steud. Norn., Ed. 2, 2: 282. 1840.

Pedilanthus subcarinatus Steud. Nom., ibid.

Pedilanthus tithymaloides angustifolius pt. Griseb. Fl. Br. W. I., 52.
1859.

Shrub 1-1.3 m- Leaves pubescent, lanceolate, obtusely keeled
beneath, 7-10 cm. long, 1.5-2.5 cm. wide. Cymes upper axillary and
terminal; bracts ovate, pointed, longer than the peduncles; involucres
strongly gibbous, somewhat puberulent, i cm. long; tube abruptly
truncate, pubescent within; main lobes with ovate, entire, blunt-
pointed apices, the two lateral lobes connate to the apex, fifth lobe
ligulate with a rounded apex and connate half its length; male and
female pedicels hairy the male on the upper third. Appendix strongly
gibbous at the base, the lip ligulate, emarginate, not thickened at the
apex; glands 4. Seeds strongly trigonal, 4.5 x 3 mm., sharply apicu-
late, dull ashen, the dorsal angle most prominent.
Type locality: SANTO DOMINGO, Poiteau. Type in herb. Paris.
Distribution: CUBA, Wright. SANTO DOMINGO, Poiteau; Ehrenberg.

PORTO Rico, Garber 107; Sintenis 769; Britton &* Shafer 1869.

CULEBRA, Britton 130; Britton &° Wheeler 121. ST. CROIX, Rick-
secker. JAMAICA, Grisebach.
Illustration: An. Mus. Paris, 19:1.19.

10. Pedilanthus bahamensis Millsp. sp. nov.

Shrubby, glabrous, 1-1.5 m., leafless,* irregularly much branched,
branches about the size of a lead pencil, gray, roughened with silicious

* I describe the plant as leafless from the fact that no Native has ever seen leaves
on the plant even in the most prolonged rainy season; they all know, however, that
a cutting will produce leaves if kept in water for a period of about three weeks. I
thus produced leaves myself which were oblong-lanceolate, 2 cm. x 8 mm., rounded
at the apex, somewhat narrowed to a sessile base, midrib keeled on the lower third,
glabrous. (See sheet No. 288.150 in herb. Field Museum).

360 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

transverse ridges.* Inflorescence terminal on the branchlets; bracts
cucullate, one third to one quarter the length of the peduncles. In-
volucres about 9 mm. puberulent, bright and lasting madder-lake
color; inferior cleft of the tube shallow, the superior fissure open half the
length of the tube; main lobes blunt, finely erose-lacerate, the two
lateral lobes minute, free only at the apex, the fifth lobe flabelliform,
free half its length; male pedicels glabrous, slightly longer than the tube,
anthers glabrous, female pedicel minutely puberulent, style very slightly
trifid. Appendix narrow, about one half the length of the tube, sarcous,
usually sigmoid, the lobe blunt, very slightly notched at the apex, strong-
ly gibbous at the base; glands 2, stipitate, of the form of a ruptured 2-
celled anther. Capsule flattened-globose, deeply 3-carpelled; seeds
trigonal, olivaceous, the dorsal angle quite prominent, apiculate and
with a minute raised pimple at the apex, 3x2.5 mm.
Type locality: GRAND TURK ISLAND, on the rocky plain south of the

town where it is one of the common shrubs, C. F. & C. M. Millspaugh

9030, February, 1911. Type in herb. Field Museum of Natural

History, Chicago, sheet No. 287.782.
Distribution: The BAHAMA ISLANDS from Deep Creek, ANDROS, to

ATWOOD CAY, ACKLIN ISLAND, INAGUA, and GRAND TURK to SALT

CAY.

ii. PEDILANTHUS FENDLERI Boiss. in D. C. Prodr., 15:5. 1862.

Pedilanthus gritensis Zahlbr. An. K. K. Nat. Hofmus. Wien., 12:104.
1897.

Shrubby. Leaves 3.8-5 cm. long, short petioled, puberulent at
least beneath, cuneate at the base, acute, subcarinate. Cymes termi-
nal, few-involucred, dense; bracts one half the length of the peduncles;
involucre purple, 9 mm. long, rusty-hairy without, smooth within; tube
somewhat gibbous, the notch obtuse; main lobes rotund, lateral pair
blunt-ligulate, connate except at the apex, fifth lobe ligulate, half free,
rounded at the apex, all ciliate on the apical margin; male and female
pedicels hairy on the upper two thirds; style trifid at the apex, the stig-
matic lobes bifid. Appendix strongly ascending, one third the length of
the tube, the ligulate lobe round-margined; glands 4.
Type locality: VENEZUELA, Fendler 1202. Type (co-type visa) in herb.

de Candolle, Geneva.
Distribution: VENEZUELA, Karsten. COLOMBIA, H. H. Smith 1295.

MARGARITA ISLAND, Miller &° Johnston 31.

* The peculiar silicious ridges of the stems and branches produce a high squeak
when they are rubbed together — children play at fiddling with them, hence the local
name "Monkey-fiddle." (The play of children being locally termed "monkey
play.")

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 361

12. Pedilanthus Grisebachii Millsp. & Britton. sp. nov.
Pedilanthus angustifolius Griseb. pt. (non Poit.), Fl. Br. W. I., 52.

1859.

Shrubby, i m. high, alternately branching, canescent above. Leaves
canescent, narrowly lanceolate to linear, 1-3 cm. long, 3-4 mm. wide,
narrowed to the base, blunt at the apex, the midrib keeled beneath.
Inflorescence terminal on the branches, few to several involucred;
bracts small about half the length of the peduncles; peduncles hairy.
.8-1 cm. long; involucres small, 6.5-7 mm., canescent without, pubes-
cent within; tube truncate at the apex, the main lobes broad, erose den-
tate; lateral lobes minute, spatulate, free only at the erose apex; the
fifth lobe spatulate, fimbriate, connate two thirds its length; female
pedicel slightly hairy at the base, style slightly 3-cleft at the apex;
male pedicels glabrous. Appendix strongly gibbous at the base, some-
what more than half the length of the tube, the lobe thickened and
emarginate at the apex; glands 4. Capsule smooth, not strongly
angled; seeds very slightly trigonal almost without angles, 3.5x2.5 mm.,
deep reddish-brown mottled with irregular, light maculae.
Type locality: JAMAICA, Bull Bay, on a roadside bank, N. L. Britton
3677, September 14, 1908. Type in herb. New York Botanical
Garden.

Distribution: JAMAICA, Harris 9645. PORTO Rico, Yauco, Under-
wood 6* Griggs 637; Ponce, Heller 6192.

13. PEDILANTHUS ARTICULATUS (Kl. & Gke.) Boiss. in D. C. Prodr.,
15:6. 1862.

Diadenaria articulata Kl. & Gke. Tricocc., 108. 1859.

Leaves 3.8-5 cm. long, crisp -puberulent, sessile, shortly cuneate at
the base, oblong, obtuse or retuse, ribbed-plicate. Cymes terminal,
repeatedly dichotomous, its branches long and leafy, appressed hairy;
floral leaves (bracts) longer than the involucres, ovate, puberulent, sub-
cordate, cornucopia-shaped, mucronate; involucres central upon the
peduncle, 2.8-1.4 cm-> ^u^e glabrous without minutely and densely puberu-
lent within, the superior fissure open to the appendix and the inferior notch
to the peduncle; lobes all fimbriate, the main pair ovate, the lateral ligulate-
fiabellate connate three quarters their length, the fifth free nearly throughout;
male and female pedicels glabrous, filaments densely hairy. Appendix
lobes deltoid, densely pubescent upon the inner surface, the terminal half
revolute; glands 2 urceolate, long stipitate the lower half connate with the
walls. Near P. Pavonis from which it differs in its obtuse, plicate leaves
and the inflorescence characters.

362 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

Type locality: MEXICO, Pawn. Type (visa) in Herbarium Boissier,

Geneva.
Distribution: Known only from the type.

14. PEDILANTHUS BRACTEATUS (Jacq.) Boiss. in D. C. Prodr., 15:6.
1862.

Euphorbia bracteata Jacq. Schoenb., 3:14, t. 276. 1798.

Ventenatia bracteatus Tratt. Gen. PL Disp., 87. 1802.

Shrubby, 1.20 m., branches scabrous leafless before flowering.
Leaves smooth, i dm. long, subsessile, rounded at the base, oblong, obtuse
or retuse, keeled beneath. Cymes terminal, repeatedly dichotomous,
the articulations elongated, glabrous, leafy; floral leaves longer than
the involucres, ovate, acuminate, concave, glabrous; tube of the in-
volucre glabrous; lateral lobes linear, villous, shorter than the fifth lobe;
pedicels and filaments glabrous; styles connate throughout. Appendix
somewhat short, 4-glandular. Capsule subsphasrical, 3-angled.
Type locality: MEXICO.
Distribution: Known only from the type.
Illustrations: Jacq. Schoenb., 3^.276.

15. PEDILANTHUS SPECTABILIS Robinson, Proc. Am. Acad., 43:23.
1907.

Shrubby; stems about 9 dm., terete, thick, leafy, gray. Leaves
ovate-oblong, shortly and thickly petioled, 9 cm. long, 3.8-6.3 cm.
broad, entire, smooth above, short and soft pubescent beneath, apex
rotund, sometimes retuse, always mucronulate, slightly cordate at the
base. Cymes terminal, dichotomous, densely bracteate, 16.5 cm.
broad; bracts broadly ovate, cordate, sessile, opposite, entire, 3.8-5 cm.
diameter, longer than the internode, acute or acuminate, extended into
a tail, puberulous, purple-red, margin tomentellate ; peduncles gray-
tomentose on the lower half glabrous above; involucre white, 1.9 cm.
long the base slightly -invaginate; the inferior notch extending nearly to
the peduncle; main lobes shorter and broader, the other three ligulate,
free nearly to the base, all erose at the apex and tomentellate on the
margins; stipe of ovary smooth, nodding; filaments smooth; style 9.5
mm. long; stigma unevenly 3 -pronged; capsule subsphaeric, about 9.5
mm. in diameter, obtuse, 3-lobed, each carple cornuate at the upper
and lower dorsal ends; seeds grayish-green, angular, 5 mm. long. Appen-
dix deeply 2 -parted, lobes linear, acute, about 18 mm. long, much
shorter than the tube, scaphoid, thickened and bi-laterally scutellate
at the prow-shaped tips; 4-glandular, glands morchellaeform.

DEC., 1913. EUPHORBIACE^E — MlLLSPAUGH 363

Type locality: MEXICO, Iguala Canon, on limestone ridges, alt. 2.500
ft., December 28, 1906, Cyrus G. Pringle 13.914. Type (visa) in
herb. Gray, Cambridge, Mass.

Distribution: Known only from the type.

1 6. Pedilanthus Greggii Millsp. sp. nov.

Shrubby; stems ligneous, irregularly branching. Leaves oblong-
lanceolate, subsessile, about 9x3 cm., keeled beneath, finely puberulent,
cuneate at the base, acute. Bracts large, including the involucres,
ovate, broad, 1.5 cm. x 8 mm., rounded at the base acuminate at the
apex, reddish; involucres 1.8 cm. long, finely puberulent without pubes-
cent within; tube truncate, the inferior cleft one third its length; main
lobes broad, truncate, erose-dentate ; lateral lobes ligulate, erose dentate,
two thirds connate with the main lobes; fifth lobe similar but connate
for only half its length; female pedicel short, glabrous; male pedicels
unknown.* Appendix projecting backward in a sac, 9 mm. long, deeply
cleft into two ligulate lobes each of which is folded upon itself to the
form of a canoe with a bifid prow; glands 2, large, deltoid, stipitate.
Capsule depressed-globose shortly exserted; seeds trigonal, 5x4 mm.,
white-farinose, apiculate at both base and apex, angles prominent the
dorsal most strongly so.
Type locality: MEXICO, Dr. J. Gregg 1156. Type in herb. Missouri

Botanical Garden, St. Louis, sheet No. 13.466.
Distribution: Known only from the type.

17. Pedilanthus Olsson-Sefferi Millsp. sp. nov.

Shrubby; stems and branches succulent, hollow. Leaves short
petioled, glabrous above densely crisp -puberulent beneath, 3-6 x 1.5-2
cm., oblong to ovate, obtuse, midrib keeled beneath. Inflorescence
terminal, cymose, puberulent; floral leaves oval, 4-2.5 x 2-1.5 cm->
acute to acuminate, twice the length of the involucre and its peduncle ;
peduncles shorter than the breadth of the involucre. Involucre small,
i x .5 cm., minutely puberulent especially at the base; tube thick;
inferior notch half the length of the tube, superior fissure also half its
length; main lobes oblong, the free margin minutely and evenly serrate;
lateral lobes ligulate, truncate, serrate, connate at the lower third; fifth
lobe ligulate, rounded and serrate at the apex, free to its base; male
pedicels and filaments glabrous, anthers pilose; female pedicel pilose,
style 6-cleft at the apex. Appendix half the length of the tube, sarcous,
the lip deeply cleft into two ligulate, blunt lobes folded upon themselves
like a trough, the margins and apices hairy; glands 2, large, cymbali-
*A11 destroyed by insect pests in the specimens seen.

364 FIELD MUSEUM or NATURAL HISTORY — BOTANY, VOL. II

form, set closely facing each other at the base of the tube. Fruit

unknown.

Type locality: MEXICO, Tomellin, collected by the late Dr. Pehr

Olsson-Se/er, August, 1910. Type in herb. Missouri Botanical

Garden, St. Louis, sheet No. 13. 465.
Distribution: Known only from the type.

18. PEDILANTHUS INVOLUCRATUS (Kl. & Gke.) Boiss. in D. C. Prodr.,
15:6. 1862..

Diadenaria involucrata Kl. & Gke. Tricocc., 107. 1859.

Shrubby, 9 dm.-i.2 m. Leaves petiolate (petioles 6 mm. long),
glabrous above, deflexed puberulent beneath, oblong, short-apiculate,
7.5 cm. long, 4.2 cm. broad. Cymes terminal bi-cephalic; bracts of the
inflorescence puberulent, orbicular, apiculate, 2 cm. long, 1.6 mm.
broad; involucres small, 10 mm. long; filaments glabrous.
Type locality: MEXICO. Type a living plant in the Botanical Garden,

Berlin, 1859.
Distribution : Known only from the type.

19. PEDILANTHUS RUBESCENS Brandegee, in Zoe, 5:209. 1905.
Stems numerous 1-2 m. high, much branched. Leaves nearly

glabrous, ovate-lanceolate, cuneate at the base into a short petiole,
midrib keeled and excurrent at the tip, 9 cm. long, 3.5 cm. broad.
Cymes terminal, the floral leaves brick-red; involucres pubescent,
cuneate at the base, 2 cm. x 9 mm., the inferior notch extending nearly
to the base, the two main lobes oblong-oval, the two lateral narrow,
linear, erose at the apex, connate four fifths their length, fifth lobe
ligulate, truncate, erose-dentate; male and female pedicels glabrous,
filaments glabrous; style nearly i cm. long; capsule smooth, on a stipe
i cm. long, 12 mm. broad; seeds somewhat cuboid, apiculate, 5.5 x 4.5
mm., strongly 3-angled the dorsal most prominent, reddish-brown,
pulverulent (not pubescent). Appendix with two elongated-deltoid
lobes thickened and compressed laterally at the bilobate apex, each
•with a large, phalloid gland at its base.
Type locality: MEXICO, Culican, August 30, 1904, T. S. Brandegee.

Type (visa) in herb. University of California, Berkeley.
Distribution: Known only from the type locality where it was also

collected by Dr. Edward Palmer in 1891 (his number 1767 in herb.

New York. Botanical Garden).

20. Pedilanthus Palmeri Millsp. sp. nov.

Shrubby; stems hollow except at the nodes. Leaves broadly lanceo-
late-ovate, acute, narrowed to a cuneate base, glabrous, keeled beneath.

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 365

Cymes trichotomous ultimately 3-cephalic; peduncles 1-2 cm. long,
slender, finely puberulent; bracts i .5 x .8 cm., oval, acute, slightly exceed-
ing the peduncles; involucres puberulent, 1.5 x .6 cm., the superior
fissure closed to the throat by the connate lateral and fifth lobes; tube
short, deeply notched beneath, projecting narrowly backward to sup-
port the long appendix; main lobes broader than long, the apex rounded,
each with a projecting deltoid tooth connate with the lanceolate, acute,
lateral lobes which, in turn, are connate with the ligulate, truncate,
fifth lobe so that all together entirely close the usual superior fissure of
the tube, all three minor lobes are free at their apices the fifth being
slightly longer than the lateral; the notch of the tube has three to four
raggedly-deltoid teeth at the base of its sulcus; male pedicels glabrous,
female puberulent. Appendix as long as the tube, projecting poste-
riorly half its length and extending anteriorly along the margin of the
fissure to the throat, split its entire length into two separate, linear lobes
folded upon themselves upward like a trough; glands 4, of two sorts,
circular with raised thickened margin : two single ones placed flat against
the walls of the gibbum, two double ones placed back-to-back at the
summits of long stipes connivent with the walls at the base of the
linear lobes (these latter resemble stamens with ruptured, 2-celled
adnate anthers).
Type locality: MEXICO, Tepic, 1892, Dr. Edward Palmer 1995. Type

in herb. New York Botanical Garden.
Distribution: Known only from the type.

21. PEDILANTHUS TOMENTELLUS Robn. & Greenm. Am. Jour. Sci.,

50:164. 1896.

Tall, 1.5-2.4 m., rusty-tomentulose ; branches stout, terete. Leaves
short petioled, ovate-oblong to oblong-lanceolate, narrowed at both
ends, obtusish, tomentulose upon both surfaces, 4.8 cm. long, 2.4 cm.
broad. Cymes terminal, twice dichotomously forked, about 5 cm.
diameter, outer floral leaves and those of the forks large, bright red,
sessile, broadly ovate or suborbicular, cordate, shortly acuminate,
tomentulose, 2.4-3 cm- l°ng> enclosing the smaller bracts and the
involucres thus giving the cyme a somewhat 2 -cephalic appearance.
Involucres 1.2 cm. in length, tomentulose throughout, unequally
5 -cleft at the throat the divisions rounded to sub-truncate with an
erose or fimbriated margin, the three interior much smaller, linear-
oblong; pedicels of the staminate flowers glabrous, filaments and
anthers pubescent; pedicel ovary and style of the pistillate flowers
ferrugineous-tomentose ; style 5 mm. long the three divisions 2 -cleft.
Appendix deeply 2-cleft the lobes about 7 mm. long, lanceolate, obtuse,
thickened at the apex; glands 2 or 4.

366 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

Type locality: MEXICO, Oaxaca, in hedgerows, alt. 5.500 ft., September
6, 1894, Cyrus G. Pringle 4912. Type (visa) in herb. Gray, Cam-
bridge, Mass.

Distribution: Known only from the type locality where it was also
collected by Seler 1402; Chas. L. Smith 216, 1182; and E. W. Nelson
1201.

22. PEDILANTHUS PAVONIS (Kl. & Gke.) Boiss. in D. C. Prodr., 15:6.
1862.

Diadenaria Pavonis Kl. & Gke. Tricocc., 108. 1859.

Leaves large, 12.5-17.5 cm. long, 6.5-7.5 cm. broad, subsessile,
coriaceous, glabrous, rounded at the base, oblong, acute. Cymes
terminal, many times dichotomous, compactly corymbose, closely
hirsute; floral leaves ample, 1.8-2. cm. long, longer than the involucres,
oval, subcordate at the base, apiculate, persistent, puberulent. In-
volucres puberulent, 1.6-1.8 cm. long; tube narrower than the appendix
and scarcely longer, the main lobes fimbriate on the margins; pedicels
of the male flowers filamentosely hairy. Appendix scarcely shorter
than the tube, 2-glandular, the lip plainly inflexed with an evident fold
beneath the apex within.
Type locality: MEXICO, Ruiz & Pavon. Type (visa) in herb. Boissier,

Geneva.
Distribution: MEXICO, Colima, Palmef 1328 (1891).

23. PEDILANTHUS MACRADENIUS Donnell-Smith, in Bot. Gaz., 19:263.
1894.

Arboreous; leaves glabrous, 10-15 x 5~7-5 cm-> at the apex of the
branches, olive-green, broadly ovate-oblong, obtuse at both base and
apex; petioles glabrous, 6 mm. long. Cymes short, few-involucred,
springing from the upper axils; bracts oblong-ovate, longer than the
peduncles, 12x6 mm., rubescent beneath hoary pubescence; ped-
uncles hairy; involucre rubescent, 1-1.5 x .6 cm., glabrous without,
densely pubescent within including the lobes; superior fissure closed
to the throat, inferior notch about one third the length of the tube;
main lobes ovate, acute, long-hairy at the apex; lateral lobes free only
at the spatulate, hairy apex; fifth lobe ligulate-spatulate hairy at the
apex; male and female pedicels glabrous, bracteoles many, threadlike.
Appendix nearly one half the length of the tube, cleft for about one third
its length into two broadly ovate, flat lobes; glands 2, large, oval, flat.
Capsules 8 mm. diameter, depressed-spherical, marked with six broad
white lines of dehiscence; coccules carinate; seeds trigonal-globose.

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 367

Type locality: GUATEMALA, Canival, Huehuetenango, alt. 3.200 ft.
December, 1891, Dr. W. C. Shannon, U. S. A. 412. Type (visa) in
herb. Capt. John Donnell-Smith, in herb. U. S. National Museum,
Washington, D. C.

24. PEDILANTHUS OERSTEDII Kl. & Gke. Tricocc., 106. 1859.
Branches virgate, leafless, terete, sparsely branchleted, long and

stiffly puberulent. Cymes terminal; involucres solitary or few, ped-
uncles glabrous.

(Said to differ from P. aphyllus only in the above characters).
Type locality: NICARAGUA, Segovia, Oersted. Type in herb. Botanical

Museum, Copenhagen.
Distribution: Known only from the type.

25. PEDILANTHUS APHYLLUS Boiss. in Kl. & Gke. Tricocc., 100. 1859.
Pedilanthus calcaratus Schlecht. in Linnaea, 19:155. 1847. ex ref.

et descr. pi. non visa.

Branches virgate, leafless, whitish, nearly simple. Cymes termi-
nal; floral leaves deciduous; involucres single or in twos; peduncles
pubescent; involucres 2 cm. long (1.2-1.4 cm.); tube hairy within, deeply
notched below, the main lobes rounded and erose-dentate at the apex, the two
lateral lobes connate somewhat more than half their length and the fifth
lobe one half connate with them, all spatulate, the rounded apices finely
erase, ciliate; pedicels of the male and female flowers glabrous, the
female bent strongly back toward the base of the involucre immediately upon
its issuance from the tube, style at first entire at the apex later shortly 3-
cleft. Appendix about half the length of the tube and projected along its
margin to the apex, prolonged posteriorly into a sarcous, 4-lobed, spurlike
sac, its two lobes narrowly elongated-ligulate, blunt, emarginate; glands 4.
(The italicized characters are drawn from Pringle No. 6291).
Type locality: MEXICO, Ruiz & Pavon. Type in herb. Boissier, Geneva.
Distribution: MEXICO, Orizaba, Botteri 968; Tehuacan, Puebla, Mac-

Dougal &* Rose, Pringle 6291, Purpus 3419, Rose & Rose; Liebmann

(P. calcaratus Schl.).

26. PEDILANTHUS NODIFLORUS Millsp. Field. Col. Mus. Bot., 1:305.
1896.

Shrubby, 2 m. high; stems whitish-farinose, jointed, widely branch-
ing; branches virgate, alternate, leafless. Inflorescence in lateral,
spiciform, densely white-tomentose cymes at the nodes. Involucre
red, hairy without and within, 8 x 4.5 mm., the superior fissure closed
by the united lateral and fifth lobes, the inferior notch about half the

368 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

length of the tube; main lobes truncate, erose-dentate, overlapping to
form an oval orifice of the sinus; lateral and fifth lobes ligulate, free at
the apex, equal, truncate, the lateral connivent with the edges of the
fissure; the fifth lobe keeled, all saccate at the base; male and female
pedicels glabrous; young capsule hairy. Appendix nearly as long as
the tube, 2-saccate and 2-glandular at the base, deeply bi-lobed, the
lobes narrowly ligulate, unequally 2 -digitate, appearing like an extended
and apposed thumb and forefinger of a human hand.
Type locality: MEXICO, Yucatan, Silam, abundant about the port,

April, 1895, Dr. George F. Gaumer 649. Type in herb. Field Museum

Natural History, Chicago; sheet No. 36.452.
Distribution: MEXICO, Yucatan, Progreso, Mills paugh 1667.
Illustration: Field. Col. Mus. Bot., i:pl.iy.

27. PEDILANTHUS CYMBIFERUS Schlecht. in Linnasa, 19:253. 1847.
Branches crispid-hairy; leafless. Cymes . . .; peduncles glabrous,

8 mm. long; involucres glabrous, 1.2 cm. long; tube with the inferior
notch 4 mm. deep; main lobes equal, rounded and finely serrate at the
apex; lateral lobes connate to near the obtuse, serrate apices, pubescent
without; fifth lobe spatulate; male and female pedicels glabrous; ovary
glabrous; style 6 mm. long, shortly 3-cleft at the apex. Appendix sar-
cous the gibbous portion warty-tuberculate without and closely puberu-
lent within including the lip; lobes ligulate, 6 mm. long, obtuse; glands
unknown.
Type locality: MEXICO, Liebold 213. Type in herb. University of

Kiel, Germany.
Distribution: Known only from the type.

28. PEDILANTHUS MACROCARPUS Benth. Bot. Voy. Sulph., 4^.23, f. A.
1844.

Hexadenia macrocarpa Kl. & Gke. Tricocc., 107. 1859.

Shrubby, 9 dm. high; dichotomously branching; branches terminal,
thick, fleshy, articulated by constriction. Leaves of the stem unknown.
Cymes lax, few-flowered; floral leaves or bracts minute, 6-8 mm., cucul-
late, one quarter the length of the peduncle; peduncles shorter than the
involucres; involucres 1.8-3.2 cm. long (2.3 x i cm.) the peduncle central
on the tube; tube plainly gibbous, 4-lobed (sic.) the superior fissure closed
to the throat, the inferior notch shallow; main lobes orbicular and erose-
dentate at the apex; lateral and fifth lobes narrowly linear and connate into
a trefoil at their apices where only they are free, apices flabellate, ciliate ;
male flowers ligulo-bracteolate, the pedicels with that of the female flower
glabrous; styles bi-lobed at the apex; capsule large, fleshy, 2.4 cm.

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 369

(including the horns), 3-carpellate (one aborted in all specimens seen);
carpels each prolonged downward into two conical horns; seeds globose-
lenticular, 7.5 mm. diameter, rusty-brown, smooth, apiculate. Appendix
fleshy, slightly shorter than the tube (usually about one half its length) ,
deeply cleft into two ligulate, laterally compressed, bi-geniculate lobes
turned upward at the rounded apex; glands 8 (often by abortion 6} in two
sets of four each at the bases of the lobes. (Characters in italics drawn
from the Palmer, Agiabampo plant).
Type locality: MEXICO, Lower California, Magdalena Bay, Hinds.

Type in herb. Kew, England.

Distribution: MEXICO, Agiabampo, Palmer 802 (1890); Manzanillo,
Palmer 802 (1891); Magdalena Island, Brandegee; El Lano de
Santana, Brandegee; Los Angeles Bay, Palmer 604, 605 (1887).
Illustrations: Bot. Voy. Sulph., 4:t.23, f. A.

29. Pedilanthus peritropoides Millsp. sp. nov.

Shrubby, glabrous. Leaves sessile, 12-15 cm- l°ng> 5~6 cm. broad,
thin, ample, glabrous, oblong to ovate, rounded and often emarginate
at the apex, cuneate at the base, the midrib keeled for its lower third
beneath. Inflorescence terminal, cymose, crisp-pubescent, bracteate;
bracts oval, pointed, 1.8 x 1.5 cm., as long as or slightly longer than the
peduncles. Involucre 2x1 cm. crispidulous-puberulent without, gla-
brous within, the tube broad and truncate anteriorly; main lobes ovate,
pointed, entire; the three accessory lobes short, flabellate, equal, free
at the ciliate apex only; male pedicels numerous, glabrous; female crisp-
puberulent throughout; style 3-parted at the apex, stigmatic branches
bi-lobed. Appendix small, about one third the length of the tube, its
lobes entirely concealed within the wing-margined fissure of the tube;
lobes 3, the superior pair ligulate, the margins folded upward upon them-
selves like a trough, the third lobe elongated-linear with a deltoid base,
all crisp-puberulent ; glands 4 at the gibbum: one pair at the inner
bases of the superior folded lobes the other pair on the walls of the gib-
bum beneath the base of the third lobe.

The involucres, with their large, rounded anterior end, appear as if
reversed from their usual form, the posterior exactly resembling the
usual anterior extremity. The male flowers are exserted upward in a
plumelike fascicle from the fissure instead of forward, as usual, along the
female pedicel.

Type locality: MEXICO, Coahuayula, Michoacan, Dr. G. M. Emrick 80,
November, 1902. Type in herb. Field Museum of Natural His-
tory, Chicago; sheet No. 200.416.
Distribution : Known only from the type.

370 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

30. PEDILANTHUS ITZ^EUS Millsp. Field. Col. Mus. Bot., 1:305. 1896.
Shrubby, glabrous, 1.5 m. high; branches virgate, strongly zig-zag,

succulent. Leaves sessile, sarcous, ovate, acute, deltoid at the base,
5-7.5 x 4—6 cm., mid- vein prominent beneath, lateral veins nearly at
right angles. Inflorescence terminal, i or 2 involucred; involucres
glabrous, light-pink, i cm. x 3.5 mm., superior fissure open three quarters
the length of the tube; inferior notch shallow; main lobes rounded;
lateral lobes comparatively large, ovate, one third free; fifth lobe ligu-
late, free two thirds its length, truncate; all ciliate; male and female
pedicels glabrous. Appendix small, about one third the length of the
tube, 3-lobed, 4-glandular, lobes deltoid at the base, the central trun-
cate, notched, the two lateral triangular, acuminate, shorter. Style
3-cleft, the divisions 2-lobed.

Yaxhalalche. Also cultivated for ornamental purposes and used
in domestic medicine. The Mayas consider the plant very poisonous.
They use quarter drop doses, in water, as a certain and effectual pur-
gative.
Type locality: MEXICO, Yucatan, Silam, March to June, Dr. Geo. F.

Gaunter 452. Type in herb. Field Museum of Natural History,

Chicago, sheet No. 36.255.
Distribution: MEXICO, Yucatan, Merida, Dr. Arthur Schott 552 (in

herb. Field Museum); Porfirio Valdez 85. CUBA, Britton, Britton &

Shafer 156. SANTO DOMINGO, Wright, Parry 6° Brummel.
Illustration: Field Col. Mus. Bot., i:t.i8.

§CALCEOLASTRUM: Involucre bilabiate, gibbous at the base of
the superior lip. Superior lip (appendix) large, anteriorly curved,
shoe-shaped, inflated, compressed, orbicular, opening by a small rounded
aperture at the base, 4-glandular internally. Lower lip (tube of the
involucre) short, urn-shaped; lobes 5, short, somewhat connivent,
ciliate; inferior pair ovate, three to four times broader, superior oblong,
scarcely shorter. Floral bracts none. Ovary not cup-shaped. Differs
from Eupedilanthus in the following characters: shrubs with glandu-
liform stipules; upper-lip (appendix) ample and shoe-shaped, the
anterior and posterior facies compressed.

31. PEDILANTHUS FINKII Boiss. in D. C. Prodr., 15:1261. 1866.
Shrubby; stems smooth, hollow except at the nodes. Leaves sub-
sessile, oblong, 10-14 cm- l°ng> the base long-attenuate, apex acute and
bearing a dark, cornuous mucron; midrib prominently keeled beneath.
Cymes terminal, often twice-dichotomous, branching from the base,

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 371

10.2-12.7 cm. including the peduncles; floral bracts oblong-lanceolate,
acute, slightly puberulent, as long as the puberulent peduncles, not early
deciduous; peduncles but slightly exceeding the involucres; involucres
obconic at the base, 1.3 cm. long, 9 mm. broad, the appendix and tube
nearly parallel, beautifully roseate or greenish, or the appendix roseate
while the tube is greenish; tube thin; male and female pedicels glabrous ;
style long-exserted, very slender or threadlike, deeply cleft into three
lobes at the apex. Appendix calceolate, dorsally concave with a rounded
margin, 3.5 mm. broad, thicker than the tube; glands circular, flat, thick
rimmed. (Characters in italics are drawn from plants grown in the
Missouri Botanical Garden).

Type locality: MEXICO, Cordova, Finck. Type in herb. Kew, England.
Distribution : Known only from the type and from a plant brought by
the Mexican Commission to the Louisiana Purchase Exposition, St.
Louis, in 1904, from which cuttings were grown in the Missouri
Botanical Gardens up to 1907 ; of this plant there is a herbarium sheet
in the herb. Missouri Botanical Garden and in herb. Field Museum
of Natural History, through the courtesy of the Director of the
Garden.

SPECIES NON SATIS NOT^E.

Pedilanthus Houlletii Baill. Adansonia, 1:341. 1861.

The description of this species was drawn from a plant cultivated
for several years in the gardens of M. Houllet, Paris. I am not certain
that a herbarium specimen was preserved. No nativity of the original
plant is recorded in the description.

Pedilanthus Ghiesbreghtianus Baill. Adansonia, 1:340. 1861.
A species credited to Mexico but with insufficient description to
satisfactorily establish its status.

CUBANTHUS Millsp. Gen. nov.

Pedilanthus Sectio Cubanthus Boiss. in D. C. Prodr., 15:7. 1862.

Involucre equal, urn-shaped, the apex (throat) constricted, truncate,
minutely and irregularly denticulate-erose, erect upon the peduncle;
appendix a concave, glandular disk upon the middle of the dorsum;
peduncle jointed and bearing two leafy bracts; fruiting pedicel strictly
erect; bracteoles numerous.

This genus apparently joins Pedilanthus toEuphorbiodendron,to the

372 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. II

latter its species bear great general resemblance in being small trees
bare of leaves except at the apices of the young branches and in bearing
its glandular appendix on the outer wall of the involucre.
Type species: Pedilanthus linearifolius Griseb.

Bracteoles glabrous; branchlets slender . i. linearifolius

Bracteoles hairy; branchlets thick and stubby 2. Brittoni

C. linearifolius (Griseb.) Millsp. comb. nov.

Pedilanthus linearifolius Griseb. Wright Cub., in Mem. Am. Acad.,
1860: 161.

Leaves elongate, linear, attenuate at the base, acuminate, the mid-
rib keeled throughout. Cymes terminal, 2-several cephalic, umbellulo-
corymbose, shorter than the leaves, the peduncles jointed and bearing
two ovate, acute, leafy bracts nearly equaling the involucre. Styles
connate to the apex.

A shrub or small tree appearing much like a Euphorbiodendron or
Thevetia neriifolia. Branches smaller than a goose quill, the younger
ones leafy or leaf-scarred throughout. Leaves 2.5-10 cm. long, 2-3 mm.
wide, margin sub-revolute, the midrib whitish and keeled beneath,
glabrous. Branchlets 3-5 mm. thick (pi. sice.}, bark reddish-brown,
striate. Appendage more or less scutellaeform, sessile, ovate, the margin
corrugate. Male flowers numerous, subincluded, pedicels gla-
brous, bracteoles numerous, glabrous; female pedicel long exserted,
strictly erect; capsule 6 mm. long, transversely anastomose-wrinkled ;
calycle small, acutely 3-lobed, lobes minutely deltoid, acuminate; seeds
cylindro-lenticular, buff, hilum dark brown, 4.2 x 3.7 mm. Peduncles
in fruit 2 cm. long. Involucres 5.1 mm.

CUBA: Farallones, N. Sophie, Wright No. 1677, Nov. 12, 1859.
Type (visa) in Herbarium Gray, Cambridge, U. S. A., type photograph
in Herb. Field Museum. Pitajones, Province of Santa Clara, Shafer
No. 12.194, 12.200, February 28, 1912.

C. Brittoni Millsp. sp. nov.

Leaves . . . Branches and branchlets thick (pi. sice.} short and
stubby; leaf scars crowded at the apex only; bark yellow or coppery,
smooth. Peduncles in fruit i cm. long; involucres 6.1 mm. long; appen-
dix more or less rectangular, thickened and glandular below; bracteoles
hairy. Ripe capsules 4 mm. long; seeds globose-lenticular, olivaceous,
hilum yellowish, 4 x 3.8 mm.

The species as so far known is without leaves, young involucres and
leafy bracts, it is, however, strongly differentiated from the preceding

DEC., 1913. EUPHORBIACE^E — MlLLSPAUGH 373

in its thick, stubby, much more numerous branchlets; its larger in-
volucres and shorter peduncles; its hairy bracteoles and its seeds.

CUBA: Rio San Juan, Province of Santa Clara, rocky hillsides,
Britton, Earle &° Wilson No. 5874, March 24, 1910. Type in Herbarium
New York Botanical Garden.

EUPHORBIODENDRON Millsp. Field. Mus. Hot., 2:305. 1909.

Euphorbiodendron Shaferi Millsp. sp. nov.

Shrub or small tree 3-3.3 m. high, profusely branching; branches
divaricate, leafy and leaf -scarred at the apex only; bark finely transverse
fissured. Leaves glabrous, coriaceous, oval, short petiolate, 2-3 x .8
cm., slightly narrowed at the base, apiculo-mucronate, the midrib promi-
nent and somewhat keeled on the lower third. Inflorescence solitary at
the apex of the young branchlets; floral leaves 2, opposite, brilliant red,
.orbicular, 1.4 cm. diameter, apiculate. Involucre turbinate, subsessile,
5x6 mm., glabrous, papillate without hairy at the throat within; lobes
various, mostly ligulate and irregularly 3-toothed, some deltoid, thin and
fimbriate; glands marginal, oval laterally compressed to scaphoid;
bracteoles many, threadlike, hairy; female pedicel glabrous, style 3-
lobed, the lobes re volute. Fruit unknown.

Type locality: CUBA, vicinity of Camp San Benito, Oriente, alt. 900 m.,
in a thicket along the rocky river; collected by J. A. Shafer 4078,
February 24, 1910. Type in herb. New'York Botanical Garden.
Distribution: Known only from the type.

Euphorbiodendron linearifolium Millsp. sp. nov.

Tree 5m., profusely branching; branches ascending, leafy and leaf-
scarred at the apex of the young branchlets only; bark silvery-white to
light coppery-brown, coarsely transverse fissured. Leaves sessile,
linear, pointed, only slightly if at all narrowed at the base, thick, gla-
brous, olive-green, 1.5-4 cm. long, 1.5-3 mm. broad, the midrib light
colored and keeled beneath. Inflorescence solitary at the apex of the
new branchlets; floral leaves or bracts bright scarlet, orbicular-ovate,
1.8 x 2.2 cm., pointed. Involucre cupulate, 4x6 mm., glabrous with-
out and within, thick, sarcous; lobes small, flat, with three thick, sarcous,
blunt, finger-like teeth; glands oval, laterally compressed to scaphoid;
flowers surrounded by 5 oval, fimbriate bracts enclosing a mass of
ligulate-fimbriate bracteoles and a few (about '5) male flowers; female
pedicel glabrous; style short, 3-lobed. Fruit unknown.

374 FIELD MUSEUM or NATURAL HISTORY — BOTANY, VOL. II

Type locality: CUBA, Oriente, Sierra Nipe, along trail Piedra Gorda to
Woodfred; in dry rocky thickets serpentine formation, alt. 400-500 m.
Collected by J. A. Shafer 3092, December 8, 1909. Type in herb.
New York Botanical Garden.

Distribution: Known only from the type.

DENDROCOUSINSIA Millsp. gen. nov.

Flowers dioecious, apetalous; disk none. Female flowers: calyx
cupuliform, fleshy, sepals 3, minute, each basally subtended (internally)
by a bract fringed with filamentous glands, ovary 3-celled, stigma 3-
branched. Male flowers diskless, stamens 3 with 2-celled anthers open-
ing by a longitudinal fissure, calyx lobes three, each subtended (inter-
nally) by a minute bract with a glandularly fringed margin. Capsule
tricoccous, seeds carunculate.

Trees with thick, coriaceous leaves alternate below opposite or
faciculate above, the lateral veins evident and tipped with a minute
gland when ending at the margin of the leaf; inflorescence in terminal
spikes or clusters, the male and female flowers sessile or appearing so,
minute, diskless, each accompanied by two flanking glands.

Near Sebastiania. Dedicated to the Hon. H. H. Cousins, M. A.,
F. C. S., Director of the Department of Agriculture of Jamaica.

Flowers spicate, leaves petiolate i. D. spicata

Flowers fasciculate, leaves sessile 2. D. fasciculata

i. Dendrocousinsia spicata Millsp. sp. nov., typus gen.

A small tree. Leaves alternate below, often opposite upon the
flowering branchlets, glabrous, pale-green, thick, coriaceous, 4.5-8 cm.
long, 3-4.5 cm. broad, oval to orbicular, blunt or slightly emarginate;
margin entire, revolute (pi. sice.) and pitted with very minute glandular
dots; midrib prominent beneath; lateral veins generally opposite and
substantially at right-angles to the mid- vein; petioles about 5 mm. long;
stipules discoid-glandular. Inflorescence in terminal spikes, the flowers
flanked on each side by a nearly globular gland pitted centrally; male
spikes glabrous, slender, elongated, about 10 cm., the flowers glabrous,
sessile upon a nodular prominence; stamens 3, divaricate, contiguous at
the base, filaments rigid, anthers bilocular opening with an erose margin;
calyx lobes oval, alternate with the filaments, involute to the appear-
ance of a cup, apex generally acute, erose; internal basal bracts deeply
fringed into 5-7 glandular filaments. Female spike shorter, about 4 cm.,

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 375

flowers subsessile; calyx cupulate, lobes 3, scaphoid-ovoid, sarcous,
margin erose, internal bracts as in the male; ovary 3 -celled; stigma ses-
sile, the three branches divaricate, lying closely appressed to the ovary
and incurved at the tips. Capsule glabrous, 5 mm. diameter, strongly
3-coccous, the cocci rotund, but slightly keel-marked and minutely trans-
verse wrinkled; seeds light brownish-gray, elongated-ovoid, 5 x 3.5 mm.,
smooth, caruncle flattened-discoid, umbonate, chartaceous. Sap watery.
Type locality: JAMAICA, Upper Clarendon, Peckham woods, on lime-
stone rocks at 8.5 m. altitude. Collected by Wm. Harris 10,980;
10,981; 11.204, July to September, 1911. Types in herb. Field
Museum of Natural History, sheets Nos. 376.686 (male), 376.685
(female), 376,690 (fruit collected from the same tree as the female
flowering specimens, September 9, 1912).
Distribution: Known only from the type locality.

2. Dendrocousinsia fasciculate Millsp. sp. nov.

A small tree, 5 m. Leaves alternate below, opposite and fasciculate
(appearing trifoliate) above, gray -green, glabrous, 3-9 cm. long, 1.5-5
cm. broad, ovate to oval, coriaceous, reticulate-veined, rounded at the
apex, margin slightly and irregularly wavy dotted with a few minute,
glandular points; midrib prominent and yellowish beneath, the lateral
veins irregularly disposed and ascending; stipular glands on each side
of the base of the midrib. Inflorescence (female) in sessile, crowded
fascicles at the apex of the terminal branchlets surrounded by the
fascicle of leaves. Female flowers subsessile, roseate; calyx cupulate,
lobes oval, narrow, margin irregularly 3-toothed, teeth broad, erose;
internal basal bracts short-lacerate-glandular; basal glands antler-like
with one, two or three prongs, their bases connected by an oval, erose-
margined, bractlike scale; branches of the style appressed to the ovary,
not incurved at the tips. Fruit and male flowers unknown. Sap milky.
Type locality: JAMAICA, Westmoreland and Hanover, in woods at the

summit of Dolphin Head, alt. 690 m. Collected by N. L. Britton

2219, March 18-20, 1908. Type in herb. New York Botanical

Garden.
Distribution: Known only from the type and Harris 10,266 gathered

from the same tree.

376 FIELD MUSEUM or NATURAL HISTORY — BOTANY, VOL. II

CHAM^SYCE S. F. Gray, Nat. Arr. Brit. PL, 2:260. 1821.
(§# YPERICIFOLI&}

Chamaesyce Lansingii Millsp. sp. nov.

Hirta, ad rami pilis canescentes ad folii longe et sparse pilosi; pro-
strata alternatim pauci ramoso; foliis brevissime petiolatis e basi
oblique, oblongo-ovatis, acutis, margine acute et plene serratis, stipulis
deltoideis. Involucri pauci ad basi foliis supremis, longe peduncu-
latis, anguste turbinati extus glabri intus ad fauci longe pilosi, lobis
integris (excepta duo ad sulci lace ratis), triangularis in ligula pro-
longatis, glandularum appendice ovata, alba crebro roseo coloratis,
integris. Capsulag glabrse, coccis minus carinatis; semine nigro-
argenteus ovoideo-quadrangulatis minute et transverse anastomoso-
rugulosis.

Plants rather firm stemmed, branches lurid, appressed-downy, 2-3
dm. long, internodes about 2 cm., leaves 1.2-1.8 cm. long, 6-8 mm.
broad, petioles 1.5-2 mm. long, seeds 1.2 x .9 mm. Inflorescence soli-
tary in the axils.
Type locality: ILLINOIS. Collected by Odell E. Lansing, Jr., in paved

ditches of Chicago streets, August 6, 1898, No. 402. Type in herb.

Field Museum of Natural History, Chicago, sheet No. 196.668.

Mr. Lansing re-collected the plant in the original locality in 1908,

finding the plants -persisting in all characters.

Distribution: ILLINOIS and WISCONSIN to MASSACHUSETTS and south-
ward.

Chamaesyce Rothrockii Millsp. sp. nov.

Glabra, caule erecto, simplici vel alternatim ramoso, teretis, inter-
nodiis elongatis; foliis brevissime petiolatis e basi oblique, oblongo-
ovatis, acutis, margine serratis; stipulis triangulatis ad apice laceris;
cymis pauci floralis, terminalibus foliis supremis basi suffultis, in-
volucri anguste-turbinati extus et intus glabri, lobis integris, triangularis
in ligula prolongatis, glandularum appendice alba plus minusve rudi-
mentariis, albis, ovalis, integris. Capsulae glabrae; coccis carinatis;
semine fusco-olivaceus, ovoideo, quadrangulis, transverse anastomoso-
rugulosis.

Plants firm stemmed, branches terete, ligneous, 3-4 dm. long,
internodes 3-5 cm. long; leaves 1-1.5 cm- l°ng> -5~-& cm. broad; petioles
2-3 mm. long; inflorescence 2-6 flowered; seeds 1.3 x .8 mm.

DEC., 1913. EUPHORBIACE.E — MILLSPAUGH 377

Type locality: ARIZONA. Collected by Dr. J. T. Rothrock in 1874, his
number 872 of the Wheeler Expedition. Type in herb. Field
Museum of Natural History, Chicago; sheet No. 197.499.

Distribution: MEXICO, Culiacan, 1891, Dr. Edwd. Palmer 1517.

Chamaesyce glomerifera Millsp. sp. nov.

Glabra, caule erecto simplici vel alternatim ramoso, purpurascento,
foliis brevissime petiolatis e basi oblique auriculatis, oblongo-ovatis,
obtusis, margine plane serrulatis; stipulis rubellis, carnosis, triangu-
laribus, indivisis. Cymis densiuscule glomeratis, terminalibus foliis
supremis basi suffultis; involucri anguste turbinati extus et intus glabri,
lobis fimbriatis, glandularum appendice alba, ovato-rotunda eis latiori
integra; stylis brevibus dimidiatus bifidis. Capsulae glabrae coccis mani-
feste carinatis; semine roseus ovato-tetrangulo transverse anastomoso-
ruguloso.

Plants heavily stemmed; branches terete, ligneous, 2-3 dm. long,
purplish; internodes 8 cm. long; leaves 2.5-^3.5 cm. long, 1.5-2 cm.
broad; petioles about 3 mm. long; glomerules 2-2.5 cm- broad; seeds
i mm. long, .7 mm. broad.

Type locality: GUATEMALA. Collected by the late Dr. W. A. Keller-
man, January 20, 1908, No. 8053. Type in herb. Field Museum of
Natural History, Chicago; sheet No. 224.827.
Distribution : Known only from the type.

ADENOPETALUM Kl. & Gke. Tricocc., 47. 1859.

Adenopetalum Barnesii Millsp. sp. nov.

Caule brevi duriusculo alternatim ramosissimo, ramis tenuis filiformis

glabris ad apice umbelliformis ; foliis minimis petiolatis orbiculatis

acutis barbulato-hirtis; stipulis obsoletis; involucris terminalibus

pedunculatis extus barbulatis intus glabris, lobis deltoideis erosis,

glandulis minutis ovalis concavis, appendice quinquepartita laciniis

digitoideis glandula multo longioribus; stylis bipartitis. Seminibus

griseis ovatis profunde sculptis ad angulos fovearum albotuberculatis.

A low, erect, spreading plant 13-16 cm. high, 4-12 cm. broad with

all characters minute; internodes 1-3 cm. long; leaves 3-6 x 1.55 mm.,

petioles about one half the length of the blade; seeds .8 x .4 mm.

Type locality: MEXICO, Jalisco, along the road to San Domingo Mine

near Etzatlan. Collected by the late Dr. Charles Reid Barnes and

Dr. W. J. G. Land 306, October 6, 1908. Type in herb. Field

Museum of Natural History, Chicago, sheet No. 247.472.

Distribution: Known only from the type.

378 FIELD MUSEUM or NATURAL HISTORY — BOTANY, VOL. II

II— TWO NEW STONECROPS FROM GUATEMALA

By RAYMOND HAMET.

Sedum Millspaughi Raymond Hamet, sp. nov.

Planta perennis? Radices . . . Caules floriferi erecti, robusti-
usculi, glabri. Folia alterna, glabra, sessilia, infra insertionem in calcar
non producta, plana, obovata, marginibus integerrimis, apice acutius-
cula, longiora quam latiora. Inflorescentia laxa, in cymis uniparis et
raro biparis. Bractas alternae, sessiles, infra insertionem in calcar non
producta, ovatae, marginibus integerrimis, apice acutiusculae, glabrse,
longiores quam latiores. Pedicelli calyce paulo breviores, glabri.
Calyx glaber, segmentis 5, infra insertionem in calcar non productis,
suboblongis, marginibus integerrimis, apice acutiusculis longioribus
quam latioribus. Corolla glabra, calyce paulo longior vel paulo brevior,
segmentis 5, tubo multo longioribus, obovatis, in parte inferiore attenu-
atis, marginibus integerrimis, apice acutis et aristatis, arista petali
apicem superante, longioribus quam latioribus. Stamina 10; filamenta
omnia longe lineari-deltoidea, glabra, oppositipetala infra corollas medi-
um inserta ; antheras suborbiculares, basi et apice emarginatas, tarn longas
quam latae vel paulo latiores quam longiores, oppositipetalas corollas
medium superantes sed petalorum apicem non attingentes. Carpella 5,
multiovulata, glabra, in stylos carpellis breviores attenuata, placentis a
gracili ligamine secundum carpellorum margines disposito constitutis,
apice obtusas, longiores quam latiores. Folliculi 5, multiseminati,
erecti, lateribus internis non gibbosis. Semina testa duabus extremita-
tibus nucleum non superante.

Caulibus floriferi 11-13 cm. longi. Folia 25 mm. longa, 9.50 mm.
lata. Bractas 4.50 mm. longas, 1.60 mm. latae. Pedicelli 4 mm. longi.
Calycis pars concreta 0.75-1 mm. longa, pars libera 4.20-5.75 mm.
longa, 1.30-2.25 mm. lata. Corollas pars concreta 0.30 mm. longa, pars
libera 4.75-5.50 mm. longa, 2.30-2.50 mm. lata. Staminum alterni-
petalorum pars concreta 0.30 mm. longa, pars libera 2.20-2.^5 mm.
longa, 0.30 mm. lata; staminum oppositipetalorum fiamentorum pars
concreta i mm. longa, pars libera 1.75-1.80 mm. longa, 0.20 mm. lata.
Antheras 0.50 mm. longas, 0.50-0.60 mm. latas. Carpellorum pars con-
creta 0.50-0.60 mm. longa, pars libera 1.75-2 mm. longa. Styli 0.75-
0.80 mm. longi. Squamae 0.80-1 mm. longas, 0.40-0.50 mm. latae.

DEC., 1913. SEDUM — HAMET 379

GUATEMALA, Depart. Amatitlan, Laguna (Lake Amatitlan); alt.
1200 m.; 25 January, 1906 [W. A. Kellerman No. 6559 — typus in
herb. Field Museum of Natural History, Chicago; sheet No. 220.889],

Sedum Triteli Raymond Hamet sp. nov.

Planta perennis. Radices fibratae. Caules basi subrepentes et
steriles caules edentes, deinde erecti et simplices, glabri et papillosi.
Folia alterna, sessilia, infra insertionem in calcar non producta, obovato,
sublinearia vel obovato, suboblonga, integra, glabra, apice obtusa vel
obtusiuscula, longiora quam latiora. Inflorescentia biflora. Bractas
foliis similes sed eis minores. Pedicelli calyce breviores, glabri. Calyx
glaber, segmentis 5, tubo longioribus, infra insertionem in calcar non
productis, longe lineari-deltoideis, basidilatatis, marginibus integerrimis,
apice obtusiusculis, longioribus quam latioribus. Corolla glabra, calyce
longior, segmentis 5 tubo multo longioribus, suboblongis, marginibus
integerrimis, apice obtusiusculis, dorso subcarinatis, carina petali
apicem non superante, longioribus quam latioribus. Stamina 10;
filamenta omnia longissime lineari-subdeltoidea, glabra, oppositipetala
infra corollas medium inserta; antherae subovato, reniformes basi emar-
ginatas, apice obtusae, tarn longe quam latae, oppositipetalae corolla
medium superantes sed petalorum apicem non attigentes. Carpella 5,
pauciovulata, glabra, in stylos carpellis breviores attenuata, placentis a
gracili ligamine constitutis. Squamae 5, sublineares, basi leviter
dilatatas, medio coartatae, apice leviter dilatatae, inflatae et obtusae,
longiores quam latiores. Folliculi 5, pauciseminati, divergentes,
lateribus internis non gibbosis; semina testa duabus extremitatibus
nucleum non superante.

Planta 3-5 cm. longa. Caules steriles 6 mm. longi. Folia 4.50-7
mm. longa, 2-3 mm. lata. Inflorescentia 9 mm. longa, 12 mm. lata.
Pedicelli 0.60 mm. longi. Calycis pars concreta 1-1.20 mm. longa, pars
libera 4.50-5.50 mm. longa, 1.75-2 mm. lata. Corolla pars concreta
0.15-0.25 mm. longa, pars libera 5.50-6 mm. longa, 0.55 mm. lata.
Staminum oppositipetalorum filamentorum pars concreta 1.60-2 mm.
longa, pars libera 3.50 mm. longa. Styli 2 mm. longi. Squamae 1.40
mm. longae, 0.50 mm. latae.

GUATEMALA, on rocks of the Sierra Madre, 400 m.; flowers yellow,
June 10, 1882. [F. C. Lehmann, No. 1528. Type in herb. Barbey,
Boissier].