ASCLEPIADE.-E. XXXIX. GOSOLOBUS. 



137 



lobed. Anthers dehiscing transversely, terminated by a mem- 

 brane ; pollen masses fixed by the outer extremities, in respect to 

 the cells (f. 1 7. A.), covered by the stigma. Stigma flattish-de- 

 pressed, 5-lobed (f. 17. e.\ '[Follicles ventricose, a little ribbed. 

 Seeds comose. Twining, suffruticose plants, natives of Ame- 

 rica, particularly within the tropics. Leaves opposite, broadish. 

 Umbels interpetiolar, pedunculate. 



1 G. MAMTIMCS (R. Br. 1. c.) leaves cordate, hairy, tomentose 

 beneath ; umbels sessile ; calycine segments lanceolate, acute ; 

 segments of corolla ovate, acute, hairy inside; tube very short. 

 1?". ^. S. Native of Tierra Bomba. Lindl. bot. reg. 931. 

 Cynanchum maritireum, Lin. mam. 54. Jacq. amer. p. 83. t. 

 56. pict. t. 82. Corolla dark purple, ex Lin. Stem hairy. Co- 

 rolla greenish, ex bot. reg. 



Sea-side Gonolobus. Fl. June, July. Clt. 1826. Shrub tw. 



2 G. SUBEROSUS (R. Br. 1. c.) leaves cordate, acuminated, 

 with an open recess, rather hairy ; calycine segments narrow ; 

 segments of corolla lanceolate, Tj . ^\ S. Native of South 

 America. Cynanchum suberosum, Lin. hort. cliff. 79. spec. p. 

 310. Willd." spec. 1. p. 1255. Dill. hort. elth. 308. t. 229. f. 

 296. Stem reddish, chinky at bottom. Flowers at first green, 

 afterwards verging to blackish purple. 



Cori-y-stemmed Gonolobus. Fl. July, Sept. Clt. 1732. 

 Shrub tw. 



3 G. CRISPIFLORUS (R. Br. 1. c.) leaves oblong, cordate, with 

 the recess closed, nearly naked above, but villous beneath ; 

 umbels many-flowered ; segments of corolla curled at apex. ?j . 

 *"\ S. Native of Jamaica, and at the Isthmus of Darien. Cy- 

 nanchum crispiflorum, Swartz. prod. 52. Ait. hort. kew. 1. 

 p. 302. Swartz, fl. ind. occ. 1. p. 536. Plum. icon. 210. 

 t. 216. f. 1. Stem downy. There are some subulate glands 

 at the recess of the leaf. Corolla white, painted with green 

 lines at the base of the segments. 



Curled-flowered Gonolobus. Fl. July, Aug. Clt. 1741. 

 Shrub tw. 



4 G. PLANIFLORUS (R. Br. 1. c.) leaves cordate, glabrous 

 above, and tomentose beneath ; umbels sub-compound ; caly- 

 cine segments lanceolate, acuminate ; segments of corolla roundish- 

 ovate, flat, spreading. Tj . ^\ S. Native of New Spain, on die 

 precipices of Mount de la Popa, about Carthagena ; and of 

 Trinidad. Cynanchum planiflorum, Jacq. amer. 82. t. 86. pict. 

 45. t. 81. Lin. syst. 257. Leaves ciliated on the petioles, with 

 rusty stifF pili. Corolla flat, veiny, and rusty. 



Flat-jlonered Gonolobus. Fl. Ju. Aug. Clt. 1818. Shrub 

 twining. 



5 G. VIRIDIFLORUS (Roem. et Schultes, syst. 6. p. 61.) leaves 

 ovate-cordate, or ovate, acuminated, glabrous ; umbels few- 

 flowered, shorter than the leaves ; calycine segments lanceolate ; 

 segments of corolla oblong, acute, f; . / ~\ S. Native about the 

 Essequibo. Lindl. bot. reg. 1126. Cynanchum viridiflorum, 

 Meyer, prim, esseq. p. 141. G. Guianensis, Spreng. syst. 1. p. 

 845. Stem hairy while young. Corolla greenish yellow. 

 Stamineous corona margined with white. Very nearly allied to 

 G. planiflurus ; but differs, in the leaves of that species being 

 downy beneath, in the umbels being racemose, and in the calyx 

 being longer than the corolla. 



Green flowered Gonolobus. Fl. Sept. Clt. 1826. Shrub tw. 



6 G. GRAKDiFLORBs (R. Br. 1. c.) hairy ; leaves cordate- 

 ovate, acuminated, glaucous beneath ; segments of corolla ovate, 

 acuminated, coriaceous. *t . ^. S. Native of South America. 

 Lindl. bot. reg. t. 1053. Cynanchum grandiflorum, Cav. icon. 

 1. p. 14. t. 21. Willd. spec. 1255. Stem and peduncles beset 

 with rufous hairs. Petioles villous. Corolla coriaceous, larger 

 than in any other species of the genus, greenish ; corona purple. 



Great-flowered Gonolobus. Fl. July, Aug. Clt. 1826. 

 Shrub tw. 



VOL. IT. 



7 G. ROSTRA'TUS (R. Br. 1. c.) hairy ; leaves oblong-cordate, 

 with the recess open ; calycine segments ovate ; segments of 

 corolla narrow-lanceolate, 3 times longer than the calyx, pilose 

 outside. Tj . rk . S. Native of Trinidad. Cynanchum rostra- 

 turn, Vahl, symb. 3. p. 45. Willd. spec. 1. p. 1254. Hairs of 

 the stem retrograde. Leaves 2-3 inches long, rather pilose. 

 Umbels few-flowered. Pedicels and petioles hairy. Corolla 

 acuminately rostrate before expansion. 



Beaked- flowered Gonolobus. Fl. Ju. Sept. Clt. 1824. 

 Shrub tw. 



8 G. NIGER (R. Br. 1. c.) glabrous; leaves ovate-cordate, 

 acute ; racemes few-flowered. Jj . r> . S. Native of Mexico. 

 Cynanchum nigrum, Cav. icon. 2. p. 45. t. 159. Willd. spec. 1. 

 p. 1255. Nearly allied to G. racembsus ; but differs, in the 

 ovate, acuminated leaves, and corolline segments, in the few- 

 flowered racemes, and in the corolla being 4 times larger, and 

 black, or very dark purple. 



#/ac/fc-flowered Gonolobus. Fl. Oct. Clt. 1825. Shrub tw. 



9 G. RACEMOSCS (R. Br. 1. c.) glabrous ; leaves ovate- cordate, 

 acuminated ; racemes simple, many-flowered ; calycine segments 

 lanceolate, concave, acute ; segments of corolla lanceolate, flat, 

 revolute and emarginate at the apex, fj . *"\ S. Native about 

 Carthagena, among bushes. Cynanchum racemosum, Lin. mant. 

 p. 54. Jacq. amer. p. 81. t. 54. pict. t. 80. Willd. spec. 1. p. 

 1255. Leaves 4 inches long, rusty beneath. Flowers small, 

 white. 



7?ocemo*e-flowered Gonolobus. Fl. Ju. Aug. Clt. 1820. 

 Shrub tw. 



10 G. CAROLINE'NSIS (R. Br. 1. c.) stem and petioles hairy ; 

 leaves ovate-cordate, acuminated, downy, on longish petioles ; 

 flowers glabrous ; segments of corolla oval-oblong, bluntish ; 

 follicles smooth, tf.. *"\ F. Native of North America, on 

 the banks of the Mississippi, in hedges. Cynanchum Caro- 

 linense, Jacq. icon. 2. t. 342. ? Flowers purplish, umbellate. 



Carolina Gonolobus. Fl. Ju. July. Clt. 1806. PI. tw. 



11 G. MACROPHY'LLUS (Nutt. gen. amer. 1. p. 163.) stems and 

 petioles hairy ; leaves large, cordate, abruptly acuminated, pube- 

 rulous; segments of corolla oval-oblong. . *"\ F. Native of Ca- 

 rolina and Virginia, in shady woods. Cynanchum macrophyllum, 

 Michx. fl. bor. amer. 1. p. 119. Vincetoxicum gonocarpus, 

 Walt. fl. car. 104. Gonolobus hirsutus, Lodd. bot. cab. 365, 

 but not of others. Asclepias gonocarpus, Gmel. syst. p. 446. 

 Cynanchum macrophyllum, Pers. ench. 1. p. 274. Flowers 

 dark purple, or dirty vellow. 



Large-leaved Gonolobus. Fl. June, July. Clt. 1822. Shrub 

 twining. 



12 G. HIRSD'TCS (Roam, et Schultes, syst. 6. p. 63. Sweet, 

 fl. gard. 1. 1 .) stems and petioles very hairy ; leaves cordate-ovate, 

 gradually acuminated, downy on both surfaces ; segments of corolla 

 linear-oblong, obtuse; follicles oblong, muricated. 3. ^\ F. 

 Native from Pennsylvania to Carolina, in hedges, near rivulets. 

 Gonolobium hirsutum, Michx. fl. bor. amer. 1. p. 119. Vince- 

 toxicum acanthocarpus, Walt. fl. carol, p. 104. Asclepias acan- 

 thocarpos. Gmel. syst. 446. Cynanchum hirsutum. G. echi- 

 natus, Lodd. cat. Flowers dark purple. 



Hairy Gonolobus. Fl. June, July. Clt. 1806. PI. tw. 



13 G. DISCOLOR (Roem. et Schultes, syst. 6. p. 63.) stem hairy ; 

 leaves soft, cordate ; peduncles longer than the petioles, umbel- 

 late ; corollas of 2 colours : with linear-lanceolate segments. 

 y. . ^, F. Native of Virginia and Canada. Cynanchum dis- 

 color, Sims, bot. mag. t. 1273. Cyn. Virginicum, Herb. Banks. 

 Gron. virg. p. 36. ? Nearly allied to G. Carolinensis, and G. 

 suberosus. Corollas green outside and purple inside. 



Discoloured- flowered Gonolobus. Fl. July, Aug. Clt. 1809. 

 PI. tw. 



14 G. HIRTCS (R. Br. 1. c.) stems beset with rufescent hairs ; 

 T 



