186 D. Prain & I. H. Burkill — a new species from Burma. [No. 4, 



Mong-KuDg, 2500-4000 ft., Grac^iocA;, 27; Forfc Stedman, OoZ/e^^, 704; 

 Taunggyi, Ahdnl Khalil. Pakokku District; Garigaw Y^Uej, Millar 

 in Mas. R. E. P. 20634. Minbu District ; below Kan on the Yomas, 

 Auhert and Gage. Prome District ; hills South of Prome, Burhill in 

 Herb. R. E. P. 23824. Pegu District; Kyauktaga, Burkill in Herb. 

 H. E. P. 21978, 22119; Sittang side, Kurz, 2629; Bank of Sittang, Kurz 

 483 ; Pegu town, in bamboo thickets, BurUll in Herb. R. E. P. 21960. 

 Myautigmya District; Hinanwi, Burkill. Amherst District ; Moulmein, 

 Wallich, 5103 0; on the soutli-east of Moulmein, Burkill in Herb. 

 R. E. P. 2:^917; 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 localit}'", 

 Heifer, 5544. 



A very closely allied species is found in south-west China, which 

 we here describe. 



DioscOREA YUNNANENSis. RMzoma deest. Gaulis sinistrorsum volu- 

 bilis, dense pubescens, teres, inarmatus (saltern quoad surculi). Folia 

 membranacea, alterna, subreniformi-cordata vel cordata, sinu angus- 

 tiore, apice parum acuminata, supra glabrescentia viridia, infra dense 

 albo-pubescentia, inermia, 7-9 cm. longa, 11-12 cm. lata, nervis prima- 

 riis9-ll (extremis bifurcatis) infra distinctis supra vix distinctis, ner- 

 vis secundariis supra infraque indistinctis, reti anastomotico vix visibile : 

 petiolus dense pubescens, inermis, 3-8 cm. longus. Spicse dependentes, 

 ad axillas folioram singulee vel binae, masculae 18-20 cm. longee, femineae 

 5-20 cm. longse. Spicse masctilm rhachis pr^eter basin sterilem 1-3 cm. 

 longam flores in cymis scorpioidiis 4-10 mm. distantibus gerentes : cymas 

 3-5-flora3, 5 mm. longge, apicem spicae versus spectantes ; bractese bifa- 

 riae, altei-nse, extus dense glabrescentes, intus glabi-ae, 1-5 mm. longae, 

 brunneo-lineolat^ : bracteolae 0. Perianthii masculi campanulati lobi 

 brunneo-lineolati, subasquales, ovato-acuti. Stamina 6, asqualia, peri- 

 anthii lobis breviora ; filamenta antheras subaequantia. Spicae feminess 

 flores 6-12 sessiles alternatim gerentes ; bracte^ extus dense pubes- 

 centes : bracteolas non vidimus. Perianthii feminei lohi iis floris masculi 

 similes. Ovanwm densissime pubescens, 3-6-costatum. Fructus loisitnrad 

 ignotce, post anthesin teste ovario gravido ad caelum versus respicieiites. 



China: Yunnan; Mengtze, in woods at 4,600 and 5,000 feet, A. 

 Henry, 9288 and 9288 A. 



This species differs from D. hii'manica in the more pubescent 

 leaves, in the equal perianth-segments and in the filaments. 



DioscoREA sp. Another apparently nearly related plant has 



