ASCLEPIADE E. 
lobed. Anthers dehiscing transversely, terminated by a mem- 
brane ; pollen masses fixed by the outer extremities, in respect to 
the cells (f. 17. h.), 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. maritimus (R. Br. l. c.) leaves cordate, hairy, tomentose 
beneath; umbels sessile; calycine segments lanceolate, acute ; 
segments of corolla ovate, acute, hairy inside; tube very short. 
bu Native of Tierra Bomba. Lindl. bot. reg. 931. 
Cynánchum marítimum, Lin. mant. 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. superdsus (R. Br. l. c.) leaves cordate, acuminated, 
with an open recess, rather hairy; calycine segments narrow ; 
segments of corolla lanceolate. h. ^. S. Native of South 
America. Cynanchum suberósum, Lin. hort. cliff. 79. spec. 
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. 
Corky-stemmed Gonolobus. Fl. July, Sept. 
Shrub tw. 
3 G. crispirLorus (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. h. 
^, S. Native of Jamaica, and at the Isthmus of Darien. Cy- 
nánchum 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. Clt. 
Shrub tw. 
4 G. PLANIFIÒRUS (R. Br. l. c.) leaves cordate, glabrous 
above, and tomentose beneath; umbels sub-compound; caly- 
cine segments lanceolate, acuminate ; segments of corolla roundish- 
ovate, flat, spreading. h.^©. S. Native of New Spain, on the 
precipices of Mount de la Popa, about Carthagena; and of 
Trinidad. Cynanchum planiflorum, Jacq. amer. 82. t. 86. pict. 
43. t. 81. Lin. syst. 257. Leaves ciliated on the petioles, with 
rusty stiff pili. Corolla flat, veiny, and rusty. 
Flat-flowered Gonolobus. Fl. Ju. Aug. Clt. 1818. 
twining. 
5 G. vinrprezóRUs (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. 5;.^*. S. Native about the 
Essequibo. Lindl. bot. reg. 1126. Cynanchum viridiflórum, 
Meyer, prim. esseq. p. 141. G. Guianénsis, Spreng. syst. 1. p. 
845. Stem hairy while young. Corolla greenish yellow. 
Stamineous corona margined with white. Very nearly allied to 
G. planiflorus; 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. enawptiELÓRUs (R. Br. |. c.) hairy; leaves cordate- 
ovate, acuminated, glaucous beneath ; segments of corolla ovate, 
acuminated, coriaceous. | b. ^. S. Native of South America. 
Lindl. bot. reg. t. 1053. Cynanchum grandiflórum, Cav. icon. 
l. 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. IV. 
Cli 17.32: 
Fl. July, Aug. 1741. 
Shrub 
XXXIX. Goxorosvs. 137 
7 G. rosrra‘tus (R. Br. l. 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. 5.^. S. Native of Trinidad. Cynanchum rostrà- 
tum, 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. 
Shrub tw. 
8 G. nicer (R. Br. l. c.) glabrous; leaves ovate-cordate, 
acute; racemes few-flowered. h.%™. S. Native of Mexico. 
Cynanchum nigrum, Cav. icon. 2. p. 45. t. 159. Willd. spec. 1. 
p.1255. Nearly allied to G. racemósus; 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. 
Black-flowered Gonolobus. Fl. Oct. Clt. 1825. Shrub tw. 
9 G. racemòsus (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. h. ^. S. Native about 
Carthagena, among bushes. Cynanchum racemósum, 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. 
Racemose-flowered Gonolobus. Fl. Ju. Aug. 
Shrub tw. 
10 G. CanorixE' sis (R. Br. l. c.) stem and petioles hairy ; 
leaves ovate-cordate, acuminated, downy, on longish petioles ; 
flowers glabrous; segments of corolla oval-oblong, bluntish; 
follicles smooth. 2t. ^. F. Native of North America, on 
the banks of the Mississippi, in hedges. Cynanchum Caro- 
linénse, Jacq. icon. 2. t. 842.? Flowers purplish, umbellate. 
Carolina Gonolobus. Fl. Ju. July. Clt. 1806. Pl. tw. 
11 G. macropny’Lxvus (Nutt. gen. amer. 1. p. 163.) stems and 
petioles hairy ; leaves large, cordate, abruptly acuminated, pube- 
rulous; segments of corolla oval-oblong. bh.^. F. Native of Ca- 
rolina and Virginia, in shady woods. Cynánchum macrophyllum, 
Michx. fl. bor. amer. 1. p. 119. — Vincetóxicum gonocárpus, 
Walt. fl. car. 104. Gondlobus hirsttus, Lodd. bot. cab. 365, 
but not of others. — Asclépias gonocárpus, Gmel. syst. p. 446. 
Cynanchum macrophyllum, Pers. ench. 1. p. 274. Flowers 
dark purple, or dirty yellow. 
Large-leaved Gonolobus. Fl.June, July. Clt. 1822. Shrub 
twining. 
12 G. urrsu‘tus (Roem. et Schultes, syst. 6. p. 63. Sweet, 
fl. gard. t. 1.) stems and petioles very hairy ; leaves cordate-ovate, 
gradually acuminated, downy on both surfaces ; segments of corolla 
linear-oblong, obtuse; follicles oblong, muricated. X4. ^. F. 
Native from Pennsylvania to Carolina, in hedges, near rivulets. 
Gonolobium hirsütum, Michx. fl. bor. amer. 1. p. 119. Vince- 
tóxicum acanthocárpus, Walt. fl. carol. p. 104.  Asclépias acan- 
thocárpos, Gmel. syst. 446. Cynanchum hirsütum. G., echi- 
nàtus, Lodd. cat. Flowers dark purple. 
Hairy Gonolobus. Fl. June, July. Clt. 1806. Pl. tw. 
13 G. píscoron (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 dís- 
color, Sims, bot. mag. t. 1273. Cyn. Virginicum, Herb. Banks. 
—Gron. virg. p. 36.? Nearly allied to G. Carolinénsis, and G., 
suberüsus. Corollas green outside and purple inside. 
Discoloured-flowered Gonolobus. Fl. July, Aug. Clt. 1809. 
Pl. tw. 
14 Dx uirtus (R. Br. l. c.) stems beset with rufescent hairs ; 
1824. 
Cit. 1820. 
