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216 
DIOSCOREACEAE. 
1.—DIOSCOREA. 
Key to species. 
. Plants armed with ae 1. rhipogonoides. 
Plants unarme a ved 2. 
. Leaves cre 5 zx s 3. 
Leaves oppos vi. € 4. 
. Capsule jm 3 Fines broad 2. sativa 
Capsule lobes more than 3 lines broad — 3. bulbifera. 
Leaves 3-4 inches long, 2-3 inches broad 5. 
~ under 3 inches a and under 
2 inches broad — ... is 6. 
Leaves ras didit. 4. persimilis. 
Leaves cordat 5. Batatas. 
. Leaves akala: or hastate at the base 6. Fordii. 
Leaves rounded at the base .., es 1, Benthamii. 
. D. rhipogonoides, Oliver in Hook. Ic. Pl. t. 1868. Wongnei- 
chong, and on hills above the Sookunpo valley, Hong- 
kong ; top of the Phoenix Mt., Swatow. Fl. white, April 
to Ma 
. D. sativa, Linn. ; Benth. Fl. Hongk. 368. Aberdeen New 
d M 
a an t. Victoria, Hongkong; Saikung Road, 
Ho g New Territory; pee FI. white, August. 
D. iit, p us Pl. ed. i. 1033. Kwangtung without 
locality. l. — 
D. persimilis, Prain et BEET in Journ. As. Soc. Beng. n.s. ii. 
454. Hongkong New Territory without locality ; ; 
i , Augt 
: ast. 
D. Batatas, Decne.; Benth. FI. gk 368. Conduit Road, 
Hongkong ; Lantao ERU, Hongkong New Territory ; 
Canton; Lienchow River. Fl. September. 
D. Fordii, Phaea Burkill l. c. 450. Mt. ` Victoris, Mt. Gough, 
and North Point, Hongkong ; ; Lantao Island, Hongkong 
New Territory. Fl. September 
. Benthamii, Prain et Burkill 10.448. Mt. Parkar north, 
D 
Happy Valley, Little Hongkong, and Tai Hong- 
kong; Lantao Island, Hongkong. New Perey. FI. 
white, June 
ROXBURGHIACEAE. 
1.-STEMONA. 
Key to species. 
Peduncles 1-flowered ... (om s E acuta. 
Peduncles 3-flowered . . tuberosa. 
S.acuta, C. H. Wri ight in Joan “Lin Soc. xxxii. 493. 
Lienchow Fail “Fi, erceniah, May. 
8. tuberosa, Lo Hook. f. Fl. Bri X Ind. vi. 298. Mt. 
Parker Noe Fer cd Fl. greenish, January ? 
