152 
§ 5. Stamineous corona deeply 5-cleft ; segments opposite the 
anthers, furnished each with a parallel segment inside. Pollen 
masses fixed by their apexes, or beneath them. 
25 C. aumicuraA' ruw (Royle, ex Wight, contrib. ind. bot. p. 
58.) twining ; leaves cordate-ovate, acuminated, ciliated, auri- 
cled at the base; umbels cyme-formed, on long peduncles, few- 
flowered; corolla 5-parted ; corona deeply 5-cleft: segments 
obtuse, exceeding the gynostegium, furnished each with a little 
parallel segment inside. h. ^. F. Native of Kinour and 
Kamaon. Wall. ascl. no. 137. 
Auricled Cynanchum. Shrub twining. 
26 C. Royer (Wight, l. e.) twining ?, downy; leaves broad- 
cordate at the base, and auricled, gradually tapering into a 
subulate apex; umbels on long peduncles, many- flowered ; co- 
rolla 5-cleft; corona deeply 5-cleft: segments obtuse, about 
equal to the gynostegium, furnished each with a small parallel 
segment, inside. bh.^. F. Native of Kinour, Royle. 
Royle’s Cynanchum. Shrub twining. 
§ 6. Stamineous corona tubular, inclosing the gynostegium ; mith 
a 10-cleft border; without any segments or carinc inside. 
Stigma terminated by an entire point. Stems erect. 
27 C. ròseum (R. Br. in mem. wern. soc. 1. p. 47.) leaves 
lanceolate-linear, undulated, smoothish ; pedicels and calyxes 
pilose; corona 10-cleft; stigma entire. 2/. H. Native of 
Dahuria, among rocks. Asclépias Dahürica, Willd. spec. 1. p. 
1272.?— Gmel. sib. 4. p. 78. t. 42. Root thick, sweet, creep- 
ing. Flowers beautiful, purple. 
Rose-coloured-flowered Cynanchum. 
1818. Pl. 1 to 11 foot. 
28 C. orientate (Willd. herb. ex Spreng. syst. 1. p. 851.) 
herbaceous, twining; leaves deeply-cordate, oblong, acute, gla- 
brous, as well as the umbels and peduncles. ?t.^. H. Native 
of Asia Minor. 
Eastern Cynanchum. PI. twining. 
Fl. July, Aug. Clt. 
$ 7. Stamineous corona saucer-shaped, fleshy, 5-10-lobed, simple 
inside. Pollen masses fixed beneath their apexes. Stigma ter- 
minated by an entire, very short point. Follicles smooth. 
Stems erectish, or twining a very little. 
29 C. vinceTéxicum (R. Br. in mem. wern. soc. 1. p. 47.) 
stems erect; corollas beardless ; umbels simple; pedicels 3 
times longer than the peduncle; corona 5-lobed. Y%.H. Na- 
tive of Europe, in gravelly places, between the 59° and 40° 
of latitude, as well as of Sweden, Denmark, &c. &c. Asclépias 
vincetóxicum, Lin. spec. p. 314. Willd. spec. 1. p. 1268. 
Oed. fl. dan. t. 849. Heyne, term. bot. t. 42. f. 3. Schkuhr. 
handb. t. 55. Bull. herb. t. 96.  Plenck, icon. t. 154. Jaume, 
St. Hil. 21, t. 6. Ludw. eclyp. t. 25.  Asclépias álba, Mill. 
dict. no. 1. fig. t. 53. — Vincetóxicum officinale, Moench. meth. 
p. 217. Stem furnished with a downy line on each side. 
Leaves ovate, acuminated, finely ciliated on the edges when 
young. Corollas white. 
Var. B, minus; all parts of the plant are one half smaller 
than those of the species. Y 
Vincetoxicum Cynanchum. 
1 to 3 feet. 
30 C. tu‘reum (Spreng. syst. 1. p. 852.) erect, glabrous; 
leaves ovate, nearly sessile, rather fleshy, veiny ; umbels axillary ; 
corolla coriaceous, with bearded edges. 2). H Native of 
Crete, Sieber. Flowers yellow. 
Yellow-flowered Cynanchum. PI. 
51 C. me'prum (R. Br. l.c. p. 48.) stems twining at tops ; 
corollas beardless ; umbels often divided; pedicels hardly 
longer than the peduncle; corona 5-lobed. ^X. H. Native 
SETS 
Fl. May, Aug. Clit. 1596. PI. 
ASCLEPIADE/E. LXII. Cynancuoum. 
country unknown.  Asclépias média, Hort. Allied to the C. 
nigrum. 
Intermediate Cynanchum. 
feet. 
32 C.? virtosum (Schultes, syst. 6. p. 103.) leaves ovate- 
oblong, villous beneath, undulated ; lower ones cordate; um- 
bels erect, simple ; corollas bearded. 2t. H. Native country 
unknown.  Asclépias villósa, Willd. enum. 1. p. 278. Balb. 
misc. 15. t. 4. Flowers white. ? 
Villous Cynanchum. Fl. Ju. Aug. Clt. 1821. Pl. 2 to 3 feet. 
33 C. nicrum (R. Br. l. c. p. 48.) stems twining at tops; co- 
rollas bearded ; umbels simple; pedicels hardly longer than the 
peduncles; corona semi-10-cleft. 2. H. Native of the south 
of Europe. Sims. bot. mag. 2390. Asclépias nigra, Lin. spec. 
p. 315. Willd. spec. 1. p. 1269. Leaves ovate-lanceolate, 
acuminated, finely ciliated on the edges, narrower than those of 
C. vincetóxicum. Flowers brown. 
Black-flowered Cynanchum. 
Fl. 2 to 3 feet. 
34 C. ugrLaA'NTHos (Hort. par. ex Poir. suppl. 2. p. 430.) 
stems twining at tops, rather hairy ; leaves ovate-cordate, acute, 
rather downy: with rounded, closed lobes. t. H. Native 
country unknown. Flowers dark purple. 
Black-flowered Cynanchum. Fl. July, Aug. 
PI. 2 to 3 feet. 
35 C. rusca‘tum (Link. enum. 1. p. 250.) stems twining at 
tops; corolla bearded; umbels simple. 2/. H. Native of the 
south of Europe, as of Spain.  Asclépias fuscàta, Willd. 
enum. suppl. p. 29. Horn. hort. hafn. suppl. 29. C. vin- 
cetóxicum, , Schultes, syst. 6. p. 104.  Asclépias tea, Mill. 
dict. Flowers yellow. ; 
Fl. May, Aug. Clt.? Pl. 2 to 8 
Fl. July, Aug. Clt. 1596. 
Cit. 1818. 
This is intermediate between the C. 
vincetóxicum and C. nigrum, but is more nearly allied to the 
latter. ; 
Bromnish-flowered Cynanchum. 
Pl. 2 to 3 feet. 
Fl. July, Aug. Clt. 1817. 
§ 8. Stamineous corona deeply 5-cleft; segments simple. Pollen 
masses fixed beneath their apices.—Decumbent or erect plants, 
sometimes twining a little. Umbels sessile, or nearly so. 
36 C. crAv'cuw (Wall. ascl. no. 138. Wight, and Arnott, 
contrib. ind. bot. p. 58.) herbaceous, erect, glabrous or downy ; 
stems rather compressed, and rather angular; leaves broad- 
ovate, or oblong-oval or lanceolate, obtuse, pale glaucous be- 
neath; umbels almost sessile ; corolla 5-cleft: segments hairy 
inside; corona deeply 5-cleft: segments obtuse; pollen masses 
fixed beneath their apexes; stigma obtuse, apiculated. 2%. H. 
Native of Nipaul. 
Var. a, latifdlium (Wight, contrib. ind. bot. p. 58.) leaves 
broad-ovate, obtuse ; umbels many-flowered. 2t. H. Native 
of Nipaul. C. glaücum, Wall. asclep. no. 133. 
Var. B, oblongif dlium (Wight. |. c.) leaves oblong-oval; um- 
bels few-flowered. 2t. H. Native of Nipaul. Wall. ascl. no. 
132, unnamed. 
Var. y, lanceolàtum (Wight, 1. c.) leaves oblong-lanceolate, 
obtuse; umbels sessile, many-flowered. 2. H. Native of the 
Peninsula of India, and at Simla. Wight, cat. no. 1554. Wall. 
ascl. no. 134, unnamed. 
Glaucous Cynanchum. PI. 2 to 3 feet. ? 
37 C. KixovziE sk (Wight, contrib. ind. bot. p. 58.) herba- 
ceous, erect; stems and petioles hairy ; leaves oval, cuspidate, on 
short petioles, downy above towards the margins, and on the nerves 
and veins, hairy beneath on the nerves, which are conspicuous, 
and veins; umbels few-flowered: corona deeply 5-cleft, equal. 
to the gynostegium; segments obtuse, separated by broad re- 
cesses ; pollen masses fixed by their apexes ; stigma obtuse. Y. 
