60 D. Prain et J. H. Burkill. 



apicem spicae versus spectantes: bracteae bifariae, alternae, fere glabrae, 

 1 — 5 mm longae, brunneo-lineolatae; bracteolae 0. Perianthii masculi cam- 

 panulati lobi marginibus exceptis externe villosi, brunneo-lineolati, ex- 

 teriores lanceolati acuti cymbiformes, interiores ovati acuti marginibus 

 retrorsi. Stamina 6, aequalia, perianthii lobis breviora, filamentis quam 

 antheris longioribus. Spicae femineae Mores 20 — 40 sessiles alternatim 

 gerentes: bracteae et bracteolae adsunt. Perianthii feminei lobi iis floris 

 masculi similes. Ovarium densissime pubescens. Fructus stipitatae, sti- 

 pite 4 — 5 mm longo, imbricatae, mox ad caelum versus spectantes, glabres- 

 centes, maturae tamen semper glabrae: alae regulariter semiorbiculares 

 vel irregulariter oblongae, 2 — 3 cm longae, 10 — 15 mm latae, apice retusae, 

 basi truncatae vel cuneatae. Semina ala membranacea inaequaliter circum- 

 cincta, 



Burma. Hukung Valley near the Assam border, Griffith, 5545, 

 K.D. Bhamo District; Bhamo, on land above flood level, Burkill in 

 Herb. R. E. P. 22770: hills east of Bhamo beyond Momouk, Burkill in 

 Herb. R. E. P. 21520, 21546. Katha District; Hatha, Burkill in Herb. 

 R. E. P. 22499, 22640. 22657, 22659. Northern Shan States; Lashio, 

 Burkill in Herb. R. E. P. 22534, 22578; Manpwe, Burkill in Herb. 

 R. E. P. 22504; Hsipaw, Burkill in Herb. R. E. P. 24059, 24137; between 

 Hsipaw and Mankang, Burkill in Herb. R. E. P. 24140. Southern Shan 

 States; without precise locality, Abdul Huq; Mong-Kung, 2500—4000 ft., 

 Craddock, 27; Fort Stedman, Collett, 704: Taunggyi, Abdul Khalil. 

 Pakokku District; Gangaw Valley, Millar in Mus. R. E. P. 20634. Minbu 

 District: below Kan on the Yomas, Aubert and Gage. Prome District; 

 hills South of Prome, Burkill in Herb. R. E. P. 23824. Pegu District; 

 Kyauktaga, Burkill in Herb. R. E. P. 21978, 22119; Sittang side, Kurz, 

 2629; Bank of Sittang, Kurz, 483; Pegu town, in bamboo thickets, Bur- 

 kill in Herb. R. E. P. 21960. Myaungmya District; Hmanwi, Burkill. 

 Amherst District; Moulmein, Wallich, 5103 C; on the south-east of Moul- 

 mein, Burkill in Herb. R. E. P. 23917; Thingan-nyi-naung on the east 

 of the Dawna range, Burkill in Herb. R. E. P. 24385; Myawadi on the 

 Siamese frontier, Burkill in Herb. R. E. P. 24448. Tenasserim, without 

 exact locality, Heifer, 5544. 



2. Dioscorea yunnanensis Prain et Burkill, 1. c. no. 4, p. 186. 



Rhizoma deest. Caulis sinistrorsum volubilis, dense pubescens, teres, 

 inarmatus (saltern quoad surculi). Folia membranacea, alterna, subreni- 

 formi-cordata vel cordata, sinu angustiore, apice parum acuminata, supra 

 glabrescentia viridia, infra dense albo-pubescentia, inermia, 7 — 9 cm longa. 

 11 — 12 cm lata, nervis primariis 9—11 (extremis bifurcatis) infra distinctis. 

 supra vix distinctis, nervis secundariis supra infraque indistinctis, reti 

 anastomotico vix visibili: petiolus dense pubescens, inermis, 3 — 8 cm 

 longus. Spicae dependentes, ad axillas foliorum singulae vel binae, 

 masculae 18 — 20 cm longae, femineae 5 — 20 cm longae. Spicae masculae 

 rhachis praeter basin sterilem 1 — 3 cm longam flores in cymis scorpioidiis 

 4 — 10 mm distantibus gerentes: cymae 3 — 5-florae, 5 mm longae, apicem 



