ASCLEPIADE.E. LXVI. SARCOSTEMMA. LXV1I. PHILIBERTIA. 



157 



at top : exterior corona cup-shaped. }j . G. Native of Arabia. 

 Cynanchum pyrotechnicum, Forsk. aegypt p. 53. no. 79. Lam. 

 diet. 2. p. 236. Microloma pyrotechnicum, Spreng. syst. 1. 

 p. 855. Branches and stem green. Pedicels filiform, yellowish. 

 Calyx catnpanulate, 5-cleft. Segments of corolla yellow above, 

 green beneath and at the base, lanceolate, with reflexed edges. 

 Follicles terete, curved, attenuated at the base. In Arabia the 

 medulla of the plant is used as tinder. 

 Tinder Sarcostemma. Shrub. 



7 S. STiPiTA'cEBi^Rcem. et Schultes, syst. 6. p. 1 16.) leafless, 

 branched, diffuse, articulated, rather mealy ; umbels termin- 

 ating the short opposite branches, or at the tops and sides of 

 the main brandies; outer corona membranous, cup- shaped, 

 pentagonal ; leaflets of inner corona thick, incurved, longer than 

 the gynostegiuni. Tr . G. Native of Arabia Felix, at Yemen, 

 in woods. Asclepias stipitacea, Forsk. arab. 50. no. 69. Lam. 

 diet. 1 . p. 285. Stems of an obscure blue colour ; joints 3 

 inches long. Pedicels filiform, about 12 in an umbel. Calyx 

 small, 5-parted. Corolla with green segments ; having reflexed 

 edges, and a white corona. Follicles slender, flat on one side 

 and convex on the other, 3 inches long. 



Stipitate Sarcostemma. Shrub 3 feet. 



8 S. FORSKCELIA'NUM (Roem. et Schultes, 1. c. p. 117.) 

 leafless, twining, glabrous, green, articulated, branched ; co- 

 rymbs or umbels twin, on short branches, forming corymbs at 

 the joints of the stems. I? . ^. S. Native of Arabia Felix, 

 and in woods near mount Melhan. Asclepias aphylla, Forsk. 

 segrypt. p. 5. no. 68. Lam. diet. 1. p. 285. Stems fleshy, 

 green. Joints a span long. Peduncles twin, on short branches, 

 and corvmbose at the joints. Flowers pedicellate, white, 

 crowded into a globose corymb. Corona as in Calotropit gi- 

 gantea, ex Forsk. Perhaps not distinct from S. riminale. 



Forskcels Sarcostemma. Shrub cl. or tw. 



* * * * Species notices of tropical America. Umbels inter- 

 petiolar. Those species contained in this section differ materially 

 in habit from the other species ; and may probably form hereafter 

 a distinct genus. 



9 S. GLAU'CCM (H. B. et Kunth, nov. gen. amer. 3. p. 194. 

 t. 229.) twining; branches terete, and are as well as the peduncles 

 and leaves glabrous ; leaves lanceolate, acuminated, acute at the 

 base, glabrous beneath ; calyx ciliated ; umbels interpetiolar, 

 on long peduncles ; segments of corolla fringed, acute ; outer 

 corona undulated, annular, fleshy, 5-parted: lobes fringed ; 

 leaflets of the inner corona ovate-oblong, obtuse, fleshy, higher 

 than the anthers. I/ . / "\ S. Native of La Guayra, Mayqueties, 

 and Cabo Blanco, by the sea side. Cynanchum pedunculare, 

 Lam. diet. 2. p. 236. Leaves membranous, revolute, green above. 

 Flowers size of those of Asclepias Syrtaca, white. Gynoste- 

 giuni twice as long; as the tube of the corolla. Pollen masses 

 subclavate, yellow, angular at the base, and geniculately in- 

 flexed. Stiiima terminated by a subconical, 2-lobed point. 



G/atfcotw-leaved Sarcostemma. Shrub tw. 



10 S. PCBE'SCENS (H. B. et Kunth, 1. c. p. 195.) twining; 

 branches, peduncles, and calyxes clothed with silky down ; 

 leaves lanceolate, acuminated, rounded at the base, membra- 

 nous, having the margins and middle nerves downy ; segments 

 of corolla ciliated, downy outside, many-nerved ; outer corona 

 narrow ; leaflets of inner corona ovate-oblong, obtuse, fleshy, 

 flat, equal in height to the gynostegium, but three times shorter 

 than the corolla, green. %. *~^. S. Native along with S. glau- 

 cum. Flowers size of those of S. glaucum. Pollen masses 

 linear-oblong, obtuse, the rest as in S. glaticum. Leaves nearly 

 2 inches long and -j an inch broad. Stigma terminated by a 

 conical, 2-lobed point. 



Doieny Sarcostemma. PL tw. 



1 1 S. CCMASB'XSE (H. B. et Kunth, 1. c.) twining ; branches 

 and peduncles glabrous ; leaves linear-lanceolate, acuminated, 

 obtuse at the base, membranous, puberulous ; calyxes downy ; 

 outer corona narrow, undulated ; segments of corolla ovate, 

 acute ; leaflets of inner corona oblong, obtuse, fleshy : gynos- 

 tegium as in the preceding, y. . I <n> . S. Native near Cumana, 

 in sandy places. Leaves 2 inches long and 2J-3 lines broad. 

 Corolla white. 



Cumana Sarcostemma. PL tw. 



12 S. BEOWKII (Meyer, prim, esseq. p. 1 39.) twining, gla- 

 brous*; leaves lanceolate, acuminated, glabrous; umbels inter- 

 petiolar ; pedicels, calyxes, and corolla downy ; segments of 

 corolla ovate, bluntish, concave, glabrous inside ; outer corona 

 an entire, narrow ring ; leaflets of inner corona ovate, bluntisb, 

 glabrous, a little higher than the gynostegium. ^ . 1 ^. S. 

 Native of Carthagena, Jacq. ; island of Arowabish, in hedges, 

 ex Meyer. S. clausum, Roem. et Schultes, syst. 6. p. 114. 

 Cynanchum clausum, Jacq. amer. 1 . p. 87. t. 60. f. 2. ed. pict. 

 t. 87. Asclepias viirinalis, Willd. spec. 1. p. 1270.? Plum, 

 icon. t. 27. f. 2. ? Lower leaves larger and broadish ovate- 

 oblong ; the upper ones becoming gradually narrower, with 

 revolute edges : painted with white on the nerves, and greenish 

 blue on the veins. Calyx small. Pollen masses oblong, a little 

 curved, hairy, hanging by short pedicels rising from blackish 

 glands. Pedicels furnished with minute villous bracteas at the 

 base. 



Browne's Sarcostemma. Shrub tw. 



13 S. SWARTZIA'XUM (Roem. et Schultes, syst. 6. p. 115.) 

 twining, filiform, glabrous ; leaves lanceolate, glabrous ; umbels 

 interpetiolar, many-flowered ; segments of corolla ovate, acute, 

 concave, ciliated ; outer corona ? leaflets of inner corona sessile, 

 ovate-conical. (7 . / ^ 1 . S. Native of the south of Jamaica, in 

 sandy arid places, among bushes by the sides of rivulets. As- 

 clepias viminalis, Swartz, prod. p. 53. fl. ind. occ. 1. p. 539. 

 Willd. spec. 1. p. 1270. ? Asclepias scandens, Mill .Sloan, 

 jam. 89. hist. 1. p. 207. t. 131. f. 1. Plum. icon. 27. f. 2. 

 Pedicels naked. Corolla white. Follicles oblong, acuminated, 

 compressed at the base, downy, hoary. 



Swartz's Sarcostemma. Clt. 1820. Shrub tw. 



14 S. LINEA'KE (Spreng. syst. 1. p. 853.) plant erectish, her- 

 baceous ; leaves almost sessile, linear, glabrous ; umbels axil- 

 lary, manv-flowered. 1 . S. Native of Cumana. 



Linear-leaveA Sarcostemma. PL erect. 



Cult. For culture and propagation see Ceropegia, p. 112. 



LXVII. PHILIBE'RTIA (named after J. C. Philibert, who 

 has written some works on elementary botany). H. B. et Kunth, 

 nov. gen. amer. 3. p. 195. 



Lis. SYST. Pentdndria, Digy'nia. Corolla urceolately rotate, 

 sinuately 5-lobed; lobes acute, intersected by as many teeth. 

 Corona double ; outer one ring-formed, in the bottom of the 

 corolla, entire, fleshy, undulated ; inner one inserted higher up 

 with the tube of the filaments, 5 -leaved : leaflets entire. Anthers 

 terminated by a membrane ; pollen masses clavately cylindrical, 

 fixed beneath their apexes, pendulous. Stigma biapiculated. 

 Follicles unknown. A twining shrub. Leaves opposite, cor- 

 date, soft, tomentose. Umbels interpetiolar, involucrated. 

 This genus is very nearly allied to Sarcostemma, from which 

 it principally differs in the urceolate. sinuately 5-lobed corolla. 



1 P. SOLANO'IDES (H. B. et Kunth, 1. c. p. 196. t. 230.) 

 \) . **\ S. Native on the banks of the river Amazon, near 

 Tomependa. Leaves green above and hoary beneath, 1 inch 

 and more long, 4-5 lines broad. Umbels 8-10-flowered, about 

 equal in length to the leaves. Corollas large, downy outside. 



Solanum-likc Philibertia. Shrub tw. 



Cult. For culture and propagation see Pergularia, p. 133. 



