Colocasia. | Aracee. 295 
III, p. 511 (1832). Synantherias sylvatica Schott. Gen. Aroid. t. 28 
(1858). Amorphophalus zeylanicus Blume Rumphia I, p. 148 (1835). 
Page 359.—For Colocasia Antiquorum Schott. read: 
Cc. esculenta Schott. Melet. I, p. 18 (1832). Arum esculentum 
Linn. Sp. Pl. p. 965 (1753). Colocasia Antiquorum Schott. 1. c. 
1oa. CaLapIuM Vent. 
Tuberous, moncecious herb; stem rooting from above the 
tuber; leaves few, long-petioled, simple, subpeltate, hastate; 
spathe long peduncled; tube thick-walled, ellipsoid; limb 
elliptic, hooded; spadix shorter than the spathe; fls. included 
in the tube; male exserted; appendage 0; male and female 
infls. separated by zone of sterile fls.; male infl. clavate, 
acute, of densely packed flat-topped, hexagonal, fleshy 
synandria; pollen emitted in threads; female infl. oblong 
ovoid; ovary 2-3-locular, with numerous ovules in each 
loculus; style wanting; stigma depressed hemispherical.— 
Sp. 9; American. 
C. BICOLOR Vent. Jard. Cels. t. 30 (1800); Engl. in Mon. Phan. IT, 
p. 457 (1879). Arum bicolor Ait. Hort. Kew, III, p. 316 (1789). 
Tubers about 1 by 2 in., depressed globose; leaves hastate, 
about 8 by 9 in., membranaceous, green, more or less spotted © 
with red or white; young leaves rounded at the base; sinus 
deep in mature leaves; lobes obtuse; apex acute; petiole 
about 10 in., sheathing at the base; spathe about 4 in. long; 
tube 14 in., glaucous green; limb 24 in. cream-coloured out- 
side, white within; spadix about 3 in., male portion 2 in., 
cream-coloured; fruit not seen. 
Low country in wet places; introduced. Peradeniya. FI. Apr. 
Native of S. America. 
10ob. XANTHOSOMA Schott. 
X. SAGITTIFOLIUM Schott. Melet. I, p. 19 (1832); Engl. in Mon. Phan. 
II, p. 469 (1879). Arum sagittifolium Linn. Sp. Pl. p. 1369 (1753) pp. 
?Xanthosoma violaceum Schott. in Oest. Bot. Wochenbl. III, p. 370 
(1853). ?Alocasia violacea Gardn. ex Parsons List. Perad. p. 9 (1926) 
nomen. 
Cultivated and occasionally seen as an escape. 
X. violaceum Schott. may possibly be distinct, though the character 
given by Engler does not appear to be valid. 
Native of the W. Indies. 
1oc. DIEFFENBACHIA Schott. 
Shrubby perennials; stem erect or prostrate; leaves 
crowded towards the top of the stem, simple; spathe per- 
sistent; spadix erect, rather shorter than the spathe; female 
Part IV. 
