ASCLEPIADACEAE. — TYLOPHORA 351 



iterum sensim dilatatus, fauce fere 1 cm. crassus; lobi 1.2-1.4 cm. longi, 

 apice cohaerentes, e basi lata anguste elliptico-oblongi, medio circiter 

 3 mm. lati, intus ad carinam sparse pilosuli, ceterum ut videtur glabri, 

 margine ciliato ; corona cyathif ormis, f oliolis fere ad medium connatis, 

 in dentes anguste triangulares acutos apice incisos hirsuto-ciliatos ligulis 

 interioribus oblongo-linearibus subobtusis glabris circiter 3-plo bre- 

 viores productis; pollinia oblonga, apice uno apiculata, translatoribus 

 ut videtur angustis brevibus; retinacula anguste oblongoidea, apice 

 uno leviter dilatata. 



Western Szech'uan: Hsiao-chin Ho valley, near Monkong Ting, 

 alt. 1900-2600 m., June 30, 1908 (No. 2313, type; climber 1-1.5 m., 

 flowers dark). 



Our plant seems most closely related to C. sootepensis Craib (in Kew Bull. Misc. 

 Inform. 1911, 420. — Costantin in Lecomte, Fl. Gen. Indo-Chine, IV. 152 [1912]) 

 from Siam, Chiengmai, in open deciduous jungle on Doi Sootep, alt. 450 m., A. F. G. 

 Kerr (No. 695, type ex Craib) as far as I can judge by the author's description. 

 In the Siamese species the leaves are described as subsessile, and I can hardly 

 beUeve that the plant from western Szech'uan can be identical with this southern 

 species. 



TYLOPHORA R. Br. 



Tylophora pseudotenerrima Costantin in Lecomte, Fl. Gen. Indo- 

 Chine, IV. 108 (1912). 



Western Szech'uan: west of Kuan Hsien, Pan-lan-shan valley, 

 alt. 2100-2900 m., June 1908 (No. 2244; climber 0.75-1.5 m. tall, 

 flowers green). 



Our plant is very similar to Tylophora tenuissima Wight & Arnott according to 

 the plate in Wight, Icon. II. t. 588, which differs in the dark color of the flowers 

 and in its longer inflorescence, and is usually regarded as a form or even a synonym 

 of T. tenuis Blume. Otherwise it agrees almost perfectly with Costantin's de- 

 scription which was drawn from specimens from Indo-China, the type having been 

 collected by Godefroij in " Cambodga: m* de Pursat." The polUnia seem to be 

 erect and included in the upper part of the anthers. 



Tylophora nana Schneider, n. sp. 



Frutex 10-30 cm. altus, aspectu Thesii; ramuli gracillimi, teretes, 

 striati, viridescentes, villoso-puberuli, basi glabrescentes, satis dense 

 foliati. Folia lineari-lanceolata, margine revoluta, 1.2-2 cm. longa, 

 1.5-3 mm. lata, utrinque acuta, superne obscure viridia, puberula, costa 

 impressa, subtus pallida, vix v. paulo pilosa, costa prominente, ceterum 

 fere enervia; petioli 1-2 mm. longi, modo ramulorum puberuli. Cymae 

 axillares, sessiles, pseudo-umbellatae, 4-7-florae; flores parvi, viridi- 

 flavescentes, aperti circiter 8 mm. diametientes; pedicelli gracillimi, vix 



