1904.] D. Prain & I. H. Burkill— 0?i Dioscorea deltoidea, etc. 7 



ad angulas nonnunquam papilloso-lineolata dispositi : panicula 12 

 cm. longa : spicarum rhachides 4*5 cm. longa) : pedunculus paniculse 3 

 cm. longus: bractese lanceolatae, ad 1*5 mm. longse : bracteolas ovato- 

 acaminatse, naviculari-concavse, glabrae, floribus breviores. Ferianthii 

 masculi lacinise ovato-oblongse, obtusae, subaequales et subsimiles 

 patentes. Stamina 6, sequalia, antherse filameiitis multo breviores. 

 Tlanta feminea ignota. 



South-West China. Yunnan : Mengtse, Dortbern mountains, at 

 7000 feet, A. Henry, 11065. 



This species seems to be most nearly allied to D. deltoidea. 



Dioscorea aoerifolia, Uline ex Diels. Radix ignota. Gaules glabri, 

 sinistrorsum volubiles, teretes, inermes, nigro-purpurei. Folia alterna 

 chartacea, supra glabei-rima, subtus ad nervos et nervulos pilis miuutis 

 nunc sparsim nunc densius hirtella, pellucide lineolata, cordato-acu- 

 minata, apice minutissime mucronulata, basis sinu latissimo, margins 

 undulata vel saepius palraatim sinuata vel lobata, lobis obtusis vel 

 nonnunquam acutis, 9- vel 11-nervia, nervis extimis profunde bifidis 

 vel trifidis, nervulis secondariis reticulatis subtus distinctis, 10-J8 cm. 

 longa, 10-12 cm. lata : petiolus apicem versus hirtellus, caeterum 

 glaber, crassior, supra canaliculatus, 10-12 cm. longus. Spicse masculse 

 simplices vel parum ramosae, saepius solitarise, nonnunquam binae, axil- 

 lares, 20-25 cm. longae : fiores in cymulas in rhacbi puberula 5-7 mm. 

 remotas dispositi : peduncalus puberulus, 4*5-5 cm. longus : bracteae lan- 

 ceolatse, ad 2 ram. longae : bracteolae ovatae, acuminatae, glabrae, floribus 

 breviores. Perianthii masculi laciniae ovato-oblongae, obtusae, subae- 

 quales, patentes. Stamina 6, aequalia ; antherae filamentis paullo bre- 

 viores. Spicse femineas axillares, solitariae, simplices, 16-20 cm. longae, 

 dependentes ; flores 30-40, sessiles, deorsum spectantes, circa "75 cm. 

 reraoti : bracteae et bracteolse adsunt. Gapsulse sessiles, assurgentes : alae 

 maturae pergamentaceae, basin versus rotundatae, apice parum retusae, 

 stramineae, purpureo notatee, 2 cm. longae, 8 cm. latee. Semina in loculo 

 quoque gemina, obovata, complanata, ala membranacea alba irregula- 

 riter circumcincta. Dioscorea acerifolia, Uline ex Diels in Engl. Bot. 

 Jahrb. XXIX., (1900), 261. D. quinqueloba, C. H. Wright, in 

 Journ. Linn. Soc. Bot. XXXI, (1903), 92 (sjn. excl.). 



Central China. Hupeh : without precise locality. A, Heiiry, 1^0- 

 Chienshih, A. Henry, 5870; Patung, A. Henry, 7358. 



Wright, Halting D. acerifolia and D. quinqueloha, adds to the above localities 

 some in northern China : we are unable to state to which of the two species these 

 northern specimens belong. Diels adds to Dr. Henry'a localities in Central China 



