Dioscoreae generis species novae Septem. 61 



spicae versus spectantes; bracteae bifariae, alternae, extus dense glabres- 

 centes, intus glabrae, 1 — 5 mm longae, brunneo-lineolatae: bracteolae 0. 

 Perianthü masculi campanulati lobi brunneo-lineolati. subaequales, ovato- 

 acuti. Stamina 6, aequalia, perianthü lobis breviora; filamenta antheras 

 subaequantia. Spicae femineae flores 6 — 12 sessiles alternatim gerentes; 

 bracteae extus dense pubescentes; bracteolas non vidimus. Perianthü 

 feminei lobi iis floris masculi similes. Ovarium densissime pubescens, 3 — 6- 

 «ostatum. Fructus maturae ignotae, post anthesin teste ovario gravido 

 ad caelum versus respicientes. 



China: Yunnan; Mengtze, in woods at 4600 and 5000 feet, A. Henry, 

 9288 and 9288 A. 



This species ditfers from D. binnanica in the more pubescent leaves, 

 in the equal perianth-segments and in the filaments, 



3. Dioscorea Prazerl Prain et Burkill, 1, c, suppl., p. 2. 



Rhizoma crassum, aliquante informe, parum hypogaeum, venenosum, 

 ■carne albo. Caulis e radice singulus, glaber, sinistrorsum volubilis, teretius- 

 culus, inermis. viridis, bulbifer. Folia alterna, chartacea, utrinque glaber- 

 rima, subtus glauca. pellucide punctata, late cordata vel sursum ovato- 

 ■cordata, acuminata, apice minutissime raucronulata, basis sinu lato vel 

 latissimo. margine nonnunquam plus minusve undulata, 7- vel 9-nervia, 

 nervis extimis profunde bifidis. nervulis secundariis reticulatis utrinque 

 distinctis, plurima 8 — 12 cm longa 10 — 16 cm lata, nonnunquam tamen 

 ad 20 cm longa lataque; petiolus glaber, sulcatus. 4 — 7 cm longus. Spicae 

 masculae simplices (rarius singulae saepius 2 — 6-nae) vel paniculatae, 

 axillares; flores glomerati, 2 — 3-ni, sessiles in rhachi trigona sparsim sed 

 fere prorsus dispositi; pedunculus glaber; bracteae sub ramulis pani- 

 cularum lanceolatae 3 mm longae, sub glomerulis florum ovato-lanceolatae; 

 bracteolae ovato-acuminatae, naviculari-concavae. Perianthü masculi la- 

 oiniae ovatae, obtusae, subaequales et subsimiles, patentes. Stamina 6, 

 aequalia, filamentis aequilonga; antherae filamentis multo breviores. Spicae 

 femineae axillares, solitariae, simplices, ad 12 cm longae. dependentes; 

 flores ad 10 — 12, sessiles, deorsum spectantes, circiter 1 cm remoti; bracteae 

 et bracteolae adsunt. Capsulae sessiles, assurgentes; alae maturae perga- 

 mentaceae, irregulariter subquadrato-semicirculares, 2,5 cm longae, 1,5 cm 

 latae, stramineo-corneae. glaucescentes. Semina in loculo quoque gemina, 

 ovato-oblonga. 8,5 cm lata, 1,25 cm longa, circumcirca alata, rufo-brunnea. 



Northern Burma. Upper Chindwin District: Sittaung, Prazer. 

 Bhamo District: Bhamo, Burkill in Herb. R. E. P. 21537; Momouk, east 

 of Bhamo, Burkill in Herb. R. E. P. 21507, 21509, 21514. Katha District; 

 Katha, in forests on black soll, Burkill in Herb. R. E. P. 21557. 22493. 

 22494, 22495. 22496, 22652. 22658. 22664, 22665. 



In the districts of Bhamo and Katha this Dioscorea occurs in the 

 forests of Dipterocarps. 



4. Dioscorea sikkimensis Prain et Burkill, 1. c. suppl., p. 3. 



Syn.; Dioscorea deltoidea Hook, f., Fl. ßrit. Ind. VI (1892), 291, partim. 

 Rhizoma crassum, aliquante informe, parum hypogaeum, venenosum, 



