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ASCLEPIADACEAE. — CYNANCHUM 347 
vix longiora, ovato-elliptiea, translatoribus versus pollinia satis dila- 
tatis iis subduplo brevioribus. Folliculi ignoti. 
Western Hupeh: Patung Hsien, thickets, alt. 600-1300 m., August 
1907 (No. 2247, type; climber 3 m. tall, flowers purple) ; without precise 
locality, A. Henry (No. 6030). 
In its flowers this species is closely related to C. auriculatum Royle, which has 
larger whitish flowers with a corolla longer than the gynostegium and much 
broaderleaves. It seems to be also similar to C. Giraldi? Schlechter (in Bot. Jahrb. 
XXXVI. Beibl. 82, 92 [1905]), which I know only from the description. The author 
does not mention the color of the flowers and describes the corolla-lobes as gla- 
brous on both surfaces and the peduncles as about as long as the pedicels. The 
type was collected by Father Hugh Scallan on Mt. Omei (Giraldi No. 2272). 
Cynanchum ($ Cynoctonum) otophyllum Schneider, n. sp. 
Suffrutex scandens ad 1.8 m. altus; ramuli teretes, flavescentes, 
unifariam pilosuli, subdense foliati. Folia membranacea, ovato-lance- 
olata, basi profunde auriculato-cordata, supra basim attenuata et 
apicem versus sensim acuminata, utrinque sparse pilosula v. subgla- 
brescentia, subtus paulo pallidiora, 4-9 cm. longa, 2.5-7 cm. ad basim 
lata; petioli superne sulcati et puberuli, 1.5-4.5 em. longi. Cymae 
elongatae, pseudo-racemoso-paniculatae, ad 4 em. longae, pedunculo 
nudo ad 3.5 cm. longo excluso, puberulae v. subglabrae. Flores albes- 
centes, satis parvae, ut videtur vix 4 mm. diametientes; pedicelli 
filiformes, subpuberuli, 3-5 mm. longi, basi bracteis minimis 
lanceolatis subglabris instructa; calycis segmenta fere libera, ovato- 
lanceolata, acuta, corolla 214-plo breviora, fere glabra, intus inter se 
squamula 1 minima instructa; corolla subrotata; lobi alte fissi, oblongi, 
obtusiusculi, circiter 2.5-3 mm. longi, extus glabri, intus margine 
excepto puberuli; corona quam corolla paulo brevior et gynostegio 
sublongior, laciniis 5 aequalibus satis alte fissis oblongis obtusiusculis 
simplicibus; antherae et cetera ut in specie praecedente descripta. 
Folliculi ignoti. 
Western Szech'uan: Tung River valley, near Wa-shan, alt. 
500-900 m., September 1908 (No. 2252, type; climber 1.8 m. tall, 
flowers white). 
I do not know a species of eastern Asia with an elongated inflorescence and small 
flowers to which I can refer Wilson's plant. It apparently belongs to the group 
Cynoctonum and may be related to the following species, which widely differs in 
ts denser and shorter inflorescence, its larger flowers, the corona of which is scarcely 
as long as the corolla-lobes, and in other characters. 
Cynanchum ($ Cynoctonum) Wilfordii Franchet et Savatier. Enum. 
Pl. Jap. YI. 445 (1879). — Hemsley in Jour. Linn. Soc. XXVI. 109 
