a) se “COMPOSITAE 6 * NEWSLETTER Number 31 December 1997 F< Scientific Editor: Bertil Nordenstam Technical Editor: Gunnel Wirénius Noblin Published and distributed by The Swedish Museum of Natural History, Department of Phanerogamic Botany, P.O. Box 50007, S-104 05 Stockholm, Sweden [ | RB (Director: Professor Bertil Nordenstam) R A Re Y ISSN 0284-8422 FEB ~ 9 499g WANICAL CONTENTS GARDEW B. NORDENSTAM: The genus Aequatorium B. NorD. (Compositae- Senecioneae) in Ecuador | Beall S. HipAYAT: Study of Compositae in several conservation areas in Indonesia 17 GE XUEJUN: An emended description of Taraxacum pseudostenoceras v. SOEST (Asteraceae) 21 B. NoRDENSTAM: A new combination in Dendrophorbium (Compositae- Senecioneae) 90 ale Book Review: CASSINI on Compositae II and Cassini on Compositae III by JOHN F. PRUSKI & HAROLD ROBINSON 24 Book Review: HARLING, GUNNAR: The Genus Jungia L. fil. (Compositae- Mutisieae) by JOHN F. PRUSKI 27 The International Association for Plant Taxonomy (IAPT) announces: Registration of plant names 29 NEW TAXA AND COMBINATIONS PUBLISHED IN THIS ISSUE Aequatorium B. NORD. subgen. Aequatorium: p. 1 Aequatorium B. NORD. subgen. Praegynoxys (CUATREC.) B. NORD., comb. nov.: p. 2 Aequatorium lepidotum B. NORD., sp. nov.: p. 6 Aequatorium limonense B. NORD., sp. nov.: p. 14 Aequatorium repandiforme B. NORD., sp. nov.: p. 9 Dendrophorbium pericaule (GREENM.) B. NORD., comb. nov.: p. 22 Comp. Newsl. 31, 1997 ] THE GENUS AEQUATORIUM B. NORD. (COMPOSITAE-SENECIONEAE) IN ECUADOR BERTIL NORDENSTAM Department of Phanerogamic Botany Swedish Museum of Natural History P. O. Box 50007, S-104 05 Stockholm, Sweden bertil.nordenstam@nrm.se Abstract A survey of the genus Aequatorium B. NORD. (Compositae-Senecioneae) in Ecuador is presented. The genus is divided in two distinct subgenera, viz. subgen. Aequatorium with white rays, obtuse style branches of disc-florets, and a characteristic stellate tomentum, and subgen. Praegynoxys (CUATREC.) B. NORD., with yellow rays, pointed style branch tips, and substellate or irregularly branching trichomes. Five Ecuadorian species are recognized, three of which are here described as new,viz., A. repandiforme B. NorD., A. lepidotum B. NorD., and A. limonense B. NORD. Senecio simulans BENOIST is a new synonym of A. jamesonii (C. F. BLAKE) C. JEFFREY. A key to the Ecuadorian species is presented. Introduction Since the genus Aequatorium B. NORD. was described (NORDENSTAM 1978) the knowledge of the genus has increased considerably (DIAZ-PIEDRAHITA & CUATRECASAS 1990, JEFFREY 1992, ROBINSON & CUATRECASAS 1992, DIAz- PIEDRAHITA & CUATRECASAS 1994) and it now comprises about 30 species distributed in Argentina, Bolivia, Peru, Ecuador and Colombia. These species belong to two distinct groups, here treated as subgenera. Subgenus Aequatorium is characterized by white rays, obtuse style branches of disc-florets, and characteristic more or less peltate trichomes with a central stalk and a stellately branched flattened disc (cf. NORDENSTAM 1978 Fig. 28K). The lower sides of the leaves are densely covered by such trichomes of a white or greyish colour, and typically they have an overlying layer of a scurfy brown or 2 Comp. Newsl. 31, 1997 orange-brown stellate tomentum, which is looser and peels off in patches. All species of this subgenus have alternate leaves, but some opposite leaves may occur in the upper parts. The subgenus comprises according to my current knowledge ten species known only from Ecuador (4 spp.) and Colombia (6 spp.). Subgenus Praegynoxys (CUATREC.) B. NORD., comb. nov. - Basionym: Senecio L. sect. Praegynoxys CUATREC., Fieldiana Bot. 27 (2): 72 (1951). Syn.: Gynoxys Cass. sect. Praegynoxys (CUATREC.) CUATREC., Brittonia 8: 157 (1955). - Type: Senecio alternifolius (SCH. BIP.) GREENM. (= Aequatorium repandum (WEDD.) C. JEFFREY). Members of this subgenus have either opposite or alternate leaves. The tomentum consists of irregularly branching trichomes, which are sometimes substellate or rarely globular with short points, but not regularly stellate and peltate like in the former subgenus. Also, the overlying evanescent brownish tomentum is lacking. The rays are consistently yellow, and the styles of the disc-florets are pointed. The subgenus is distributed from Argentina through Bolivia and Peru to southern Ecuador. About ten species have been recognized as transfers from Senecio and Gynoxys, or described as new (D{AZ-PIEDRAHITA & CUATRECASAS 1990, JEFFREY 1992, ROBINSON & CUATRECASAS 1992). Some more Bolivian species remain to be described (NORDENSTAM, in prep.), and the subgenus obviously comprises about 20 species. The differences between the two subgenera may be sufficient for generic distinction, since it is possible that subgenus Praegynoxys is closer to the genus Gynoxys than to typical Aequatorium. Further investigations to elucidate these relationships are in progress by the present author. Material and methods Herbarium material was studied from AAU, BR, F, K, MO, NY, P, S, and US, and occasional sheets from a few more herbaria (abbreviations in accordance with HOLMGREN et al. 1990). Field studies were carried oul in Ecuador in February 1992 (together with ROGER LUNDIN, who was studying mainly Gynoxys), but little material of Aequatorium was collected, the flowering season of this genus being in a different time of the year, viz. mainly in July to November. The drawings were made by the present author. Comp. Newsl. 31, 1997 3 onal 7 PG” Rnvietee QFN 8 mR Wels O¢ ig Ny ay 5 F Fig. 1. Aequatorium asterotrichum B. Noro. - A: Portion of plant, x ¥. - B: Leaf, upper and lower side, x2. - C: Capitulum, x 3. - D: Ray-floret, x 6. - E: Disc-flo- ret, x6. - F: Corolla of disc-floret, laid out, x6. - G: Stamens, x12.5. - H: Style branches (disc-floret), x12.5. - ASPLUND 18263 (S holo.). 4 Comp. Newsl. 31, 1997 Key to the Ecuadorian species of Aequatorium 1. Rays yellow. Leaves opposite, ovate, quite entire (subgen. Praegynoxys) WP SRL isthe ce TO ee ee 5. A. limonense - Rays white. Leaves alternate or some opposite, lanceolate—narrowly ovate- oblong with sinuate-dentate or dentate—denticulate margins (subgen. AC QUALOTININ) yack ia sis Bic. evidences onanendhe igen tee ee 2 2. Leaves narrowly ovate-oblong or elliptic-oblong with flat margins Pas taiaeavnnliéa des vane icennnn see ae eee Pee aes le 4. A. repandiforme - Leaves lanceolate or narrowly elliptic-lanceolate ...........ccceceseeeeseeseeeeeteeeeeees 3 3. Leaves basally with distinctly revolute margins; involucre glabrous .................. Pei era inns unseen cha dane Lear ad ov W aaas -tatk LA pose Oe 1. A. asterotrichum - Leaves with + flat margins; involucre pubeSCeml.................cccsscesceeseeeeeereeeeeeeees 4 4. Leaves broadest near the base; stellate trichomes large, fluffy ....2. A. jamesonii Leaves broadest about the middle; stellate trichomes small, scale-like .............. OO ic esaas PMMA aa nated Sablon etestcacenesaii« Teh cubes se eee 3. A. lepidotum Ecuadorian species of Aequatorium 1. Aequatorium asterotrichum B. NORD. NORDENSTAM , Opera Bot. 44: 61 (1978). - Type: Ecuador. Napo: Lago Papallacta, ca. 3,300 m, 31.X.1955, ASPLUND 18263 (S! holo.; K!, LD!, MO!, NY!, P!, R!, UPS!, US! iso.). Illustr.: Figs. 1, 6A. Further collections examined: Ecuador. Pichincha: 50 kin on road to Papallacta, just before summit of road, 3,900 m, 3.II.1991, NORDENSTAM & LUNDIN 160 (K!, NY!, S!). Napo: Papallacta, NE of lake, 3,400 m, 17.VIII.1990, JARAMILLO, GRUAIVA & GRUIJAIVA 11841 (MO!). Fig. 2. Aequatorium jamesonii (S. F. BLAKE) C. JEFFREY. - A: Portion of plant, x Y2. - B: Leaf, upper side, x %. - C: Capitulum, x 3. - D: Ray-floret, x 6. - E: Dise- floret, x 6. - F: Corolla of disc-floret, laid out, x 6. - G: Stamens, x 12.5. - H: Style branches (disc-floret), x 12.5. - HEILBORN 656 (S). Comp. Newsl. 31, 1997 5 6 Comp. Newsl. 31, 1997 Flowering period: Aug.—Nov. This species, the generic type, is apparently endemic to the Papallacta area (Pichincha and Napo Provinces). The collection from Cotopaxi cited by Diaz- PIEDRAHITA & CUATRECASAS (1990) as belonging to this species, viz. CERON, NEILL & PALACIOS 3793 (cited as 3993”), is referable to A. repandiforme (see below). The leaves of A. asterotrichum have a characteristic shape, being narrowly elliptic-lanceolate and broadest about the middle, and towards the base the margins are distinctly revolute and somewhat wrinkled. The involucral bracts are glabrous, in contrast to the two following species. 2. Aequatorium jamesonii (S. F. BLAKE) C. JEFFREY JEFFREY, Kew Bull. 47(1): 61 (1992). - Gynoxys jamesonii S. F. BLAKE, J. Wash. Acad. Sci. 18: 34 (1928). - Type: Ecuador, JAMESON 227 (K! holo.). Senecio simulans BENOIST, Bull. Soc. Bot. Fr. 83: 808 (1936), syn. nov., nom illeg. (non S. simulans CHIOV., Racc. Bot. Miss. Consol. Kenya, 70, 1935); Gynoxys simulans CUATREC., Brittonia 8: 158 (1955). - Type: Ecuador, W du Pichincha, 12.VII.1931, BENOIST 4572 (P! holo.). - Because of the homonymy CUATRECASAS created a new name, Gynoxys simulans CUATREC., not a new combination. Illustr.: Figs. 2, 6C. Further collection examined: Ecuador. Pichincha: Cerro Pichincha, Nono, 20.V.1920, HEILBORN 656 (K!, S!). Flowering period: May—July. A. jamesonii differs from A. asterotrichum by the pubescent involucre and in leafshape. Both species have more or less lanceolate leaves tapering towards both ends, but in A. jamesonii the leaves are broadest near the base, and the basal margins are not distinctly revolute as in A. asterotrichum. The species seems to be restricted to the Pichincha area and is evidently rare. I searched it in vain in 1992 in the vicinity of Nono, where it was collected by HEILBORN in 1920. This area is now much devastated with litile natural vegetation remaining. 3. Aequatorium lepidotum B. NORD., sp. nov. Type: Ecuador. Carchi: El Mirador, 15 km S of San Francisco, 77°31’ W, 00°37’N, 2.VIII.1990, PALACIOS & RUBIO 5286 (MO! holo; US! iso.). Comp. Newsl. 31, 1997 7 Illustr.: Figs. 3, 6B. Arbor 4—6 m. alta, ramis et ramulis striatis vel costatis, ramulis hornotinis stel- lato-tomentosis. Folia alterna petiolata, lamina anguste elliptico-oblonga ad ellip- tico-lanceolata plana supra plerumque glabra subtus tomento stellato duplici canescenti et ferrugineo vestita, margine denticulata. Capitulescentia pyramidalis. Involucrum obconicum stellato-tomentosum paucicalyculatum, bracteis plerumque 8 anguste oblongis vel elliptico-oblongis obtusis. Flosculi radii 5, lamina alba bre- vis tubo fere aequilonga. Flosculi disci 5S—10. Cypselae glabrae; pappi setae nu- merosae barbellatae persistentes. Fig. 3. Aequatorium lepidotum B. Nor. - A: Capitulum, x 3. - B: Ray-floret, x 6. - C: Disc-floret, x 6. - D: Corolla of disc-floret, laid out, x 6. - E: Stamens, x 12.5. - F: Styles branches (disc-floret), x 12.5. - PALACIOS & RUBIO 5286 (MO holo.). 8 Comp. Newsl. 31, 1997 Tree 4—6 m tall. Stems and branches striate—ribbed, with a dense brownish— greyish tomentum of small intermingled stellate hairs, becoming more greyish and subglabrescent with age. Leaves alternate, spreading, petiolate; petiole 1—2.5 cm long, densely stellate-tomentose; lamina flat, narrowly elliptic-oblong to elliptic- lanceolate, usually broadest around the middle and tapering towards both ends, 7— 13 cm long and 2—3.5 cm wide (uppermost leaves smaller); upper side glabrous or young leaves and midrib with a patchy short tomentum; lower side densely ap- pressed-tomentose with small stellate trichomes in 2—3 layers: innermost layer silvery-grey, very dense and entangled, overtopped with a layer of scale-like brownish stellate trichomes, and sometimes with scattered whitish stellate trichomes on top; leaf margins distantly denticulate-mucronate; apex acute— acuminate and apiculate; base subcuneate to truncate; lateral veins prominent on lower side, emitted at almost right angles, arching and anastomising before reaching leaf margin. Capitula numerous in divaricate pyramidal terminal synflo- rescences, peduncles mostly spreading or some reflexed, supported by small bracts. Involucre obconical; involucral bracts (6—)8, subuniseriate, partly overlapping, narrowly oblong—elliptic-oblong, midribbed or keeled, densely and shortly stel- late-pubescent, but inner margins often glabrous, 4—5S mm long, ca. 1.5 mm wide, obtuse to subacute. Calyculus bracts small, 3—5, triangular-subulate, 0.5—1 mm long, shortly pubescent. Receptacle flat or slightly convex, glabrous, minutely fo- veolate. Ray-florets 5, white; tube 3—4 mm long, cylindrical, glabrous; lamina narrowly elliptic-oblong—narrowly oblong, 2—4 mm long, 1—1.7 mm wide, 2— 4-veined, apically usually 2—3-fid. Style slender, long exserted; style branches ca. 0.5—0.8 mm long, obtuse. Disc-florets S—10; corolla 4.5—5 mm long; tube 2— 2.5 mm long; limb narrowly campanulate—subtubular, 2.5 mm long, deeply 5- lobed; lobes lanceolate, ca. 2 mm long, 0.3—0.5 mm wide, midlined, glabrous, acute. Anthers ca. 1.5 mm long incl. appendage; apical appendage narrowly ovate- oblong with rounded or subtruncate apex; base sagittate; endothecial tissue polar- ized. Style becoming much exserted; branches linear, 0.7—1 mm long; apex ob- tuse with very short sweeping-hairs, ontsides papillate. Cypselas narrowly oblong, glabrous. Pappus bristles numerous, persistent, 4—S mm long, minutely barbel- late, off-white or somewhat fulvous. Flowering period: July—Dec. Further collections examined: Ecuador. Carchi: El Mirador, 15 km S of San Francisco, 77°31’W, 00°37°N, 3,300 m, 2.VIII.1990, PALACIos & RuBIO 5280 (MO!, US!); Montufar Canton, Loma El Coraz6n (Bretafia), 77°42’W, 00°35°N, 3,150 m, 22—23.]1.1992, PALACIOS & TIPAZ 10538 (MO!); Espejo, Reserva Ecolégica El Angel, viejo camino El Angel-Tulcan, sitio La Rabija, 77°54'W, 00°40'N, 3,400 m, 31.X.1993, PALACIos 11688 (MO!, QCNE). Comp. Newsl. 31, 1997 9 This species resembles A. jamesonii, but the leaves are differently shaped, being broadest around the middle. Also, the synflorescence is more lax and divaricate with branches divergent at often right angles, and the bracts and calycular bracts are smaller. From A. asterotrichum it is distinguished 1. a. by the pubescent in- volucre and the flat leaf-margins. The very small and scale-like trichomes are a characteristic feature, differing from those in other species of the subgenus. The species is so far only known from a restricted range in northern Ecuador (Carchi Prov.). 4. Aequatorium repandiforme B. NORD., sp. nov. Type: Ecuador. Pichincha: Over high pass en route to Quito, 92 km E of Quevedo, 3,400 m, 19.[X.1959, B. MAGUIRE & C. MAGUIRE 44246 (NY! holo.; K!, US! isO.). Illustr.: Figs. 4, 5, 6D—E. Frutex procerus vel arbor ad 5 m. alta. Ramuli hornouni stellato-pubescentes, vetustiores glabrescentes costati. Folia alterna vel superiora opposita petiolata; lamina elliptico-oblonga vel anguste ovato-oblonga ad ovato-lanceolata plana, su- pra glabra nitida, subtus tomento stellato duplici canescenti et ferrugineo vestita, margine dentato. Capitulescentia corymbosa ramosissima. Involucrum subcylind- ricum—anguste cupuliforme + stellato-tomentosum, interdum glabrescens vel glabrum; bracteis plerumque 8 oblongis. Flosculi radii 2—5, lamina alba. Flosculi disci 5—9, corolla flavovirens vel albida. Styli rami lineares obtusi vel truncati. Antherae basi breviter sagittatae. Cypselae glabrae_ c. 8-costatae. Pappi setae nu- merosae barbellatae fulvidae persistentes. Tall shrub or tee 2—8 m high. Stems and branches somewhat square, furrowed and ribbed, greyish stellate-tomentose when young. Leaves alternate or upper ones opposite, + spreading, petiolate; petiole 1—3 cm long, densely greyish stellate- tomentose; lamina elliptic-oblong to narrowly ovate-oblong or ovate-lanceolate, broadest below or sometimes about the middle, 4—17 cm long, 2—6 cm wide, flat, upper side glabrous or somewhat pubescent when young, shiny, deep green, sometimes impressed-reticulate, lower side densely greyish-white-tomentose with stellate hairs, and a looser, rusty brown, stellate tomentum, evanescent in patches; margins irregularly dentate with blunt mucronate teeth mainly basally, otherwise denticulate-mucronate; leaf-base obtuse—truncate or slightly emarginate-cordate, often oblique; apex acute—subobtuse; midrib distinct esp. on lower side, ca. 8—15 lateral veins on each side, emitted at + right angles, and a faint to distinct reticu- late venation pattern. Synflorescence broadly corymbose, richly branched, brac- 10 Comp. Newsl. 31, 1997 teate, with erect—spreading branches. Involucre narrowly cupshaped— obconical or subcylindrical; involucral bracts (5—)8 , subuniseriate and partly overlapping, narrowly oblong or elliptic-oblong, 4—6 mm long, 1—2.5 mm wide, pale green, at least partly stellate-tomentose (inner margins glabrous), sometimes glabrescent or rarely nearly glabrous, midribbed with fainter parallel veins, obtuse with usually purple or brownish apical margins. Calyculus bracts 3—5, inconspicuous, 0.5—1.5 mm long, lanceolate or deltoid. Ray-florets 2—5; tube cylindrical, 4—5 mm long; lamina narrowly oblong or elliptic-oblong, 3—5 mm long, 0.7—1.5 mm wide, white, faintly or distinctly veined, usually 2—3-fid at the apex; style branches line- ar, obtuse to truncate. Disc-florets 5—8(—10); corolla 6—7 mm long, greenish yellow or greenish white; tube 2.5—3.5 mm long, cylindrical; limb narrowly cam- panulate, 3—3.5 mm long, lobes lanceolate, 1.5—2.2 mm long, midlined, becom- ing recurved. Anthers 1.8—2 mm long, brown with rosy-purple margins and con- nective; appendage oblong-ovate, obtuse; base shortly sagittate; collar straight. Style branches linear, yellow or purplish, apically obtuse to truncate with very short sweeping-hairs. Cypselas narrowly oblong-obovate, glabrous, with ca. 8 ribs or veins. Pappus bristles numerous, 5—6 mm long, somewhat fulvous, minutely barbellate, persistent, basally connate. Flowering period: June—Dec. The vernacular name is ”Yacupato” (in ‘Quech’, fide coll. CAZALET & PENNINGTON 5512). Further collections: Ecuador. Imbabura: Along trail between Rio Clavadero and ridge 10 miles S of Las Toldadas, E of Cayambe, 3,100 m, 27.VII.1944, WIGGINS 10493 (US!); Lago San Marcos, Cayambe, 3,400 m, 28.X1.1961, CAZALET & PENNINGTON 5381 (B, BM, F, K!, MICH, NY, US!); Lago San Marcos, Cayambe, 3,400 m, 4.X11.1961, CAZALET & PENNINGTON 5512 ( B, BM, F, K!,MICH, NY, US!). Napo: Llanganati, N slope towards Rio Golpe, just N of Chosa Aucacocha, 78°18 W, 01°08’S, 3,500 m, 15.V.1982, @LLGAARD et al. 38621 (US!) (Somewhat deviating, but material insufficient for a definite determination). Cotopaxi: Carre- tera Latacunga-Pilal6-Quevedo, 5—15 km E of Pilalé, 79°01’ W, 00°5S’S, 2,700— 3,350 m, 22.V.1988, CERON, NEILL & PALACIOS 3793 (MO!), wrongly cited as no. ”3993” and as A. asterotrichum in DiAZ-PIEDRAHITA & CUATRECASAS (1990). Morona-Santiago: E slopes of the cordillera, valley of the Rio Negro, down to the Rio Pailas (on the trail to Mendez), between Tambo Cerro Negro and the Péramo del Castillo, 2,900—3,350 m, 20—24. VIIT.1945, Camp E-4976 leg. F. PRIETO (K!, MO!, NY!, S!, US!); Muletrack Sevilla de Oro—Méndez, E slope, at Cerro Negro, El Castillo, 78°34'W, 02°47’°S, 3,000—3,250 m, 16.[X.1976, @LLGAARD & BALSLEV 9498 (AAU!, NY!). Comp. Newsl. 31, 1997 11 A rather widespread though endemic species, which is variable especially in leaf shape and texture, and pubescence. The leaves are large, generally broadest well below the middle, and the leaf-margins are sometimes distinctly dentate, some- times only shallowly denticulate-mucronate. The involucre generally has some stellate pubescence, sometimes patchy, sometimes dense, but inner margins of in- volucral bracts are usually glabrous, rarely all of them. Fig. 4. Aequatorium repandiforme B. Norb. - A: Leaf, lower side, x 2. - B: Ca- pitulum, x 3. - C: Ray-floret, x 6. - D: Disc-floret, x 6. - E: Corolla of disc-floret, laid out, x 6. - F: Stamens, x 12.5. - G: Style branches (disc-floret), x 12.5. - CAMP E-4976 (S).