ASCLEPIADACEAE. CYNANCHUM 347 



vix longiora, ovato-elliptica, 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 tliis species is closely related to C. auriculatum Royle, which has 

 larger whitish flowers with a corolla longer than the gynostegium and much 

 broader leaves. It seems to be also similar to C. Giraldii Schlechter (in Bot. Jahrb. 

 XXXVI. Beibl. 82, 92 [1905]), wliich 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) otophylium 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 cm. longi. Cymae 

 elongatae, pseudo-racemoso-paniculatae, ad 4 cm. 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 23/2-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 

 simpHcibus; 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 vv-ith 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 

 its denser and shorter inflorescence, its larger flowers, the corona of which is scarcely 

 half as long as the corolla-lobes, and in other characters. 



Cynanchum (§ Cynoctonum) Wilfordii Franchet et Savatier. Enum. 

 PL Jap. II. 445 (1879). — Hemsley in Jour. Linn. Soc. XXVI. 109 



