130 ASCLEPIADEX. XXVI. Tytornora. 
Cissus-like 'Tylophora. Fl. year. Pl. tw. 
18 T. rE'Nurs (Blum. bijdr. p. 1062.) corollas glabrous ; 
panicles axillary; pedicels subumbellate; leaves lanceolate, 
acuminated, sometimes cordate at the base, 3-nerved, glabrous ; 
follicles very acute. b. ^. S. Native on the west coast of 
Java, at the bottom of mountains. 
Slender Tylophora. Fl. year. Pl. tw. 
19 T. rups’srris (Blum. bijdr. p. 1062.) leaves ovate- 
cordate, acuminated, quintuple-nerved, glabrous ; follicles blunt- 
ish. h.^. S. Native of Java, among the Parang mountains, 
on rocks. Nearly allied to 7. ténuis. 
Rock Tylophora. Pl. tw. 
$3. Leaflets of stamineous corona rather membranous, finely 
acuminated, acute, without any cusp or point inside, longer than 
the gynostegium. 
20 T. rEzNE kRIMA (Wight, contrib. ind. bot. p. 50.) twining, 
slender, smoothish ; leaves narrow-lanceolate, attenuated at the 
apex; peduncles filiform, much longer than the leaves, bearing 
distant, 2-3-flowered fascicles ; corolla deeply 5-cleft; leaflets 
of corona exceeding the gynostegium, ovate, finely acuminated 
at the apex; pollen masses transverse; stigma obtuse. kh. 
^. S. Native of Nipaul, at Purpuhna; and the Himalaiah. 
Homolóstyles tenérrima, Wall. ascl. no. 96. 118. Leaves 1-2 
inches long and 1-4 lines broad. 
Very tender Tylophora. Shrub tw. 
84. Leaflets of corona depressed, fleshy, clasping the base of 
the gynostegium, each drawn out into a cusp-formed, erect toothlet 
at the apex, inside. 
21 T. carPAnipiFÜLIA (Wight and Arnott, contrib. ind. bot. 
p. 51.) twining, glabrous; branches slender; leaves elliptic- 
oblong, mucronately acuminated, coriaceous, reticulately veined ; 
racemes umbel-formed, almost sessile, few-flowered; flowers 
small; segments of corolla obtuse, glabrous; leaflets of corona 
roundish, fleshy, furnished on the inside at the apex with a 
short, acute toothlet. h.%.S. Nativeof Mysore. Wight, 
cat. no. 1542.  Asclépias ténuis, Heyne, herb. Wall. ascl. 
no. 122. Leaves 13 to 2 inches long, and 5-7 lines broad. 
Capparis-leaved 'Tylophora. Shrub tw. 
22 T. PunPU'REA (Wall. ascl. no. 50. ex Wight and Arnott, 
contrib. ind. bot. p. 51.) twining, glabrous ; branches slender; 
leaves subcordate-oblong, mucronately acuminated ; peduncles 
filiform, about equal in length to the leaves, bearing each 2-3 
smal] fascicles of flowers; segments of corolla acute; leaflets 
of corona roundish, clasping the base of the gynostegium, fur- 
nished with a short toothlet inside at the apex ; pollen masses 
transverse ; stigma obtuse. h. ^. S. Native on the banks of 
the Irrawaddi. : 
Purple Tylophora. Shrub tw. 
23 T. asruma’tica (Wight and Arnott, contrib. ind. bot. p. 
51.) twining, downy; branches slender; leaves ovate-roundish, 
acuminated, usually cordate at the base, glabrous above, downy 
beneath; peduncles shorter than the leaves, bearing each 2-3 
sessile, few-flowered umbels towards the apex; flowers rather 
large, on long pedicels, purplish; segments of corolla acute ; 
leaflets of corona fleshy, depressed, clasping the base of the 
gynostegium, furnished with an erect, elongated tooth inside 
at the apex ; pollen masses transverse, minute ; stigma obtuse ; 
follicles glabrous, divaricate. h. ^. S. Native of the East 
Indies. Asclépias asthmatica, Roxb. fl. ind. 2. p. 33. Willd. 
spec. p. 1270.  Asclépias tunicàta, Wall. ascl. no. 117. — Ascl. 
vomitoria, Koenig. in herb. Banks. Roxb. mus. ind. or. t. 608. 
Cynanchum ipecacuanha, Willd. spec. J. p. 1270. ^ Cynán- 
chum vomitórium, Lam. dict. 2. p. 235. Cynanchum viridi- 
florum, Sims, bot. mag. t. 1929. Spreng. syst. 1. p. 852. 
12 
XXVII, BELOSTEMMA. 
XXVIII. Marspenta. 
Hoya planiflóra, Wall. ascl. no. 117. b. V. Tyléphora pubéscens, 
Wall. ascl. no. 117. a., also Wall. ascl. nos. 119. 121. 148. 
unnamed.—Pluk. t. 336. f. 7. This plant is said to have been 
figured as Hoya viridiflóra in some foreign work. The roots 
are used on the coast of Coromandel as a substitute for Ipeca- 
cuanha. 
Var. a, pubéscens (Wight, l. c.) downy in every part, except 
the upper surfaces of the leaves. 
Var. B, glabra (Wight, l. c.) glabrous in every part. 
Asthmatic Tylophora. Shrub tw. 
24 T. rowzNTOsA ; twining, tomentose; leaves cordate, 
ovate, mucronate, white from tomentum beneath ; umbels about 
5-flowered. h. ^. S. Native of the East Indies. Cynan- 
chum tomentósum, Lam. dict. 1. p. 235. Perhaps belonging 
to the present section. 
Tomentose Tylophora. Shrub tw. 
Cult. For culture and propagation see Hoya, p. 128. 
XXVII. BELOSTE’MMA (from fedoc, belos, an arrow, 
and oreupa, stemma, a crown). Wall. mss. ascl. no. 153. 
Wight and Arnott, contrib. ind. bot. p. 52. 
Lin. syst. Pentdndria, Digynia. Corolla rotate. Stamineous 
corona 5-leaved ; leaflets linear-oblong, fleshy, fixed vertically to 
the middle of the gynostegium, averse, spreading. Anthers ter- 
minated by a membrane ; pollen masses globose, rather ascending, 
or placed transversely under the dilated margin of the stigma ; 
stigma mutic.— T wining, loosely downy shrubs. Leaves oppo- 
site, cordate, ovate, somewhat acuminated. Peduncles shorter 
than the leaves. Umbels simple, few-flowered. Flowers small. 
This genus differs only from Tyléphora in the form of the 
corona; in that the leaflets are close pressed on the gynoste- 
gium; in this they appear as if attached by the one end, and 
stand at right angles with the gynostegium, and transversely 
across the corolla. 
1 B. urgsu'ruw (Wall.l. c.) b. 
Hairy Belostemma. Shrub tw. 
Cult. For culture and propagation see Hoya, p. 128. 
XXVIII. MARSDENIA (named in honour of William 
Marsden, F.R.S. late Secretary to the Admiralty, and author of 
a * History of Sumatra," in which, though it is evident that he 
has not made botany his particular study, he has had the merit 
of turning the attention of botanists to several valuable plants, 
among others to the camphor tree of Sumatra (Dryobdélanops 
camphora), and to a species of this genus, the Marsdénia tinc- 
tòria, said to afford the best indigo in that island). R. Br. in 
mem. wern. soc. l. p. 28. prod. p. 460.—Pergularia species, 
Spreng. syst. 1. pp. 843, 844. 
Lin. syst. Pentdndria, Digynia. Corolla urceolate, 5- 
cleft, sometimes rotate. Stamineous corona 5-leaved; leaflets 
compressed, undivided, toothless inside. Anthers terminated 
by a membrane. Pollen masses erect, fixed by the base. 
Follicles smooth. Seeds comose.—Usually twining shrubs. 
Leaves opposite, broadish, flat. Cymes interpetiolar, sometimes 
thyrsoid. Stigma usually mutic, but sometimes beaked ; beak 
undivided or bifid.—Plants natives of New Holland, East 
Indies; very few in South America and Syria. This genus 
differs from Perguldria chiefly in the want of the inner lacini 
to the corona; it is therefore an arbitrary separation, and made 
principally to obtain clearer characters for both. The two 
species with an elongated stigma are perhaps not truly of the 
genus, butif separated from it must form each a distinct genus. 
Br. 
^. S. Native of Nipaul. 
Sect. I. Marspr‘niz vERx. Stigma mutic, or apiculated. 
$ 1. Throat of corolla naked. 
1 M. vextutina (R. Br. in wern. soc. mem. 1. p. 29. prod. 
