ASCLEPIADEJE. LXII. Cynancuvum. 
well as the umbels, glabrous ; segments of corolla elongated and 
spreading; alternate teeth of corona shorter. 21.^. S. Native 
of Montevideo. 
Montevideo Cynanchum. — Pl. twining. 
15 C. mucrona‘tum (H. B. et Kunth, nov. gen. amer. 3. p. 
208. t. 335.) twining; branches furnished with 2 rows of down ; 
leaves oblong, cuspidately-mucronate, acute at the base, gla- 
brous; umbels almost sessile; calyxes glabrous; corona 5- 
parted, with ovate segments, which are ligulate at the apex, al- 
ternating with the segments of the corolla; stigma terminated 
by anemarginate tubercle. b.^. S. Native of New Granada, 
on the declivities of Mount Avila. Leaves 8-9 lines long. Co- 
rolla white, glabrous, with obliquely-oblong acute segments, 
having the middle nerve green. 
Mucronate-leaved Cynanchum. Shrub twining. 
16 C. microrny'LLUM (H. B. et Kunth, nov. gen. amer. 3. p. 
204.t. 204.) twining; branches furnished vith 2 rows of down; 
leaves ovate, acute, mucronate, rounded at the base, glabrous ; 
flowers solitary, twin or tern, or by fours; calyxes glabrous ; 
corona 5-parted, with emarginately-bidentate, concave segments, 
alternating with the lobes of the corolla; stigma terminated by 
an emarginate tubercle. h.%™.S. Native of New Granada, 
in frigid places, near the town of Pasto. Leaves very small. 
Petioles furnished with interpetiolar cilia. Corolla white, ro- 
tate, with obliquely ovate, acute segments. 
Small-leaved Cynanchum. Shrub twining. 
17 C. serPyYLLIFÒLIUM (H. B. et Kunth, nov. gen. amer. 3. 
p. 205.) twining; branches marked by a downy line; leaves 
ovate-oblong, acuminated, rounded at the base, ciliated a little ; 
umbels sessile; calyx rather pilose; corona 5-parted: with the 
segments bifid at the apex; stigma convex, emarginate?. h. 
^. S. Native near Quito, in shady places; and on the declivities 
of Mount Pichincha. Very like C. microphylla, but is larger, in 
the leaves and flowers: and also differs in the flowers being um- 
bellate, in the structure of the corona and gynostegium. Corolla 
campanulate, white, with ovate-oblong, hardly oblique segments. 
Wild Thyme-leaved Cynanchum. Shrub twining. 
§ 3. Stamincous corona tubular, mith a 5-10-cleft border, inclos- 
ing the gynostegium ; inner segments or carine wanting. Pol- 
len masses usually fixed by their apexes. Stigma terminated 
by a bifid point. Stems twining. Leaves sub-cordate. 
18 C. paucirtorum (R. Br. in mem. wern. soc. 1. p. 45.) 
twining, glabrous; leaves ovate, acuminated, reniformly cordate 
at the base: the auricles diverging ; umbels few-flowered ; pe- 
duncles shorter than the petioles; flowers glabrous, on short 
petioles; corona equal to the corolla, with a 10-cleft, plicate 
border, naked inside: the lobes opposite the anthers, lanceolate, 
acuminated, bifid at top, the alternate ones very short, and emar- 
ginate or truncate ; pollen masses fixed beneath their apexes ; 
stigma apiculated, obtuse, hardly emarginate. h.%.S. Na- 
tive of the East Indies, frequent in hedges. Periploca tunicata, 
Retz, obs. 2. p. 15. Willd. phyt. 1. p. 7. no. 23. t. 5. f. 8. 
Asclépias tunicàta, Roxb. fl. ind. 2. p. 35. mus. ind. or. t. 609. 
This plant has been removed by Wight, and Arnott, from the 
section in which Mr. R. Brown placed it. As there are no interior 
keels, but only folds of the corona, which arise from contractions 
of its mouth, and disappear when expanded.  Follicles ventri- 
cose. Perhaps this, and C. angustifolium, ought to have been 
described with 5 lobes to the corona, the alternate ones being so 
very short. 
l'ew-flowered Cynanchum. — Fl.? Clt. 1820. Shrub twining. 
19 C. Watricun (Wight, l. c.) twining, glabrous ; leaves ob- 
long-ovate, acuminated, cordate at the base, auricled: auricles a 
little incurved ; corym)s shorter than the leaves, many-flowered ; 
pedicels equal in length to the peduncles, or exceeding them ; 
151 
corona equal to the corolla, somewhat 10-cleft; the lobes oppo- 
site the anthers, longer, and bifid; pollen masses fixed beneath 
their apexes; stigma mutic. h.^©. S. Native of the East Indies, 
at Jentaga and Chuna-Poonjee. Cynanchum, Wall. ascl. no. 80. 
Very closely allied to C. pauciflórum. 
Wallich’s Cynanchum. Shrub twining. 
20 C. cattiata‘tum (Hamilt. herb. no. 767, ex Wight, and 
Arnott, contrib. ind. bot. 56.) twining, glabrous; leaves ovate 
or oval, acuminated, cordate at the base, with a narrow recess, 
glaucous beneath; umbels shorter than the petioles; pedicels 
equal to the peduncle in length; corona 10-lobed, almost twice 
as short as the corolla: the lobes opposite the anthers, bifid at 
apex: the alternate ones very short; stigma sub-apiculated, en- 
tire; follicles winged. .%™.S. Native on the banks of the 
Ganges, and at Columala. Wall. ascl. no. 83. C. auriculàtum, 
Hamilt. herb. no. 768. Wall. ascl. no. 85. Periploca tuni- 
cata, Herb. madr. Wall. ascl. no. 75. b. c. 
Beautiful-ninged-podded Cynanchum. Shrub twining. 
21 C. ata‘tum (Wight, and Arnott, contrib. ind. bot. p. 57.) 
twining, smoothish ; leaves of the older branches cordately 
auricled at the base : of the young floriferous branches, oval, cus- 
pidate, cordate at the base, or emarginate, glaucous beneath ; 
umbels about equal in length to the petioles ; pedicels longer 
than the peduncles ; corona shorter than the corolla, with a cre- 
nately 10-lobed, truncate border : the alternate lobes rather the 
smallest; stigma apiculated, bifid ; follicles flattish on one side. 
with the angles marginately winged. h. ^. S. Native of 
Coromandel. Wight, cat.no. 1552.  Asclépias truncata, Roxb. 
in herb. Banks. The winged follicles, and truncate corona, will 
readily distinguish it from all cther species of this section. 
Winged-follicled Cynanchum. Shrub twining. 
22 C. ovatirouium (Wight, l. c.) twining, glabrous; leaves 
oblong-oval, acuminated ; cymes many-flowered ; peduncles 
longer than the petioles ; corona about equal in length to the 
corolla, 10-cleft; stigma apiculated, somewhat emarginate. h. 
^. S. Native of Penang. Cynanchum, Wall. ascl. no. 82. 
The ovalleaves, and cymose inflorescence, readily distinguish 
this species. 
Oval-leaved Cynanchum. Shrub twining. 
23 C. ancustirétium (Wight, and Arnott, l. c.) twining, 
smoothish ; petioles rather hairy, reflexed ; leaves linear-lanceo- 
late, euspidate, more or less cordate at the base; umbels short, 
many-flowered ; corona 10-lobed, the lobes opposite the anthers, 
broadly linear-oval, about equal in length to the corolla; the 
alternate ones very short, and inconspicuous, all truncate and 
emarginate; stigma apiculated, somewhat emarginate. h: ^. 
S. Native of Coromandel. Wight, cat. no. 1553. Leaves 3- 
5 inches long, and 4-6 lines broad. 
Narrow-leaved Cynanchum. Shrub twining. 
$ 4. Gynostegium or column of fructification stipitate. Stami- 
neous corona tubular, inserted at the base of the stipe of the 
gynostegium, 5-cleft, without any segments or inner carince in- 
side, To this section, remarkable for the elongation of the torus 
or stipe of the gynostegium, belong also a species from the 
Cape of Good Hope. 
24 C. cracitiimum (Wall. asclep. no. 86. Wight, and Arnott, 
l. c.) twining, glabrous; branches slender; leaves cordate, acu- 
minated, incurvedly auricled at the base; umbels few-flowered ; 
peduncles about equal in length to the petioles, but longer than 
the pedicels ; segments of corolla lanceolate ; stalk of gynoste- 
gium exceeding the corona, which is 5-cleft, and naked inside ; 
pollen masses fixed by their apexes ; stigma beaked, equal, 5-fur- 
rowed, truncate, equal to the membranes of the anthers. h.%. 
S. Native of the East Indies, at Sezaen. Wall. ascl. no. 86. 
Very-slender Cynanchum. Shrub twining. 
