418 AROIDEZ. 
2. Arisema macrospathum, Benth. Pl. Hartw. p. 52; Engler in DC. Monogr. 
Phanerog. ii. p. 546; Schott, Prodr. Aroid. p. 38. , 
Sourn Mexico, Morelia (Hartweg, 394), region of Orizaba (Bourgeau, 2522), without 
locality (Parkinson). Hb. Kew. 
3. XANTHOSOMA. 
Xanthosoma, Schott, Melet. i. p. 19, et Gen: Aroid. t. 46; Benth. et Hook. Gen. Plant. iii. p. 976. 
An exclusively Tropical-American genus, of about twenty-five known species. 
1. Xanthosoma helleborifolium, Schott in GEster. Bot. Zeitschr. 1865, p. 33; 
Engler in DC. Monogr. Phanerog. ii. p. 486. 
Acontias helleborifolius, Schott, Melet. i. p. 19, et Prodr. Aroid. p. 197; Griseb. Fl. Brit. W. Ind. 
p. 511. 
Arum helleborifolium, Jacq. Ic. Pl. Rar. iii. t. 613. 
Panama (fide Grisebach).—VENEZUELA to Peru, BraziL, and Guiana, and in the Wrst 
INDIES. 
2. Xanthosoma hoffmannii, Schott in CEster. Bot. Zeitschr. 1865, p. 33; 
Engler in DC. Monogr. Phanerog. ii. p. 485. 
Acontias hoffmannii, Schott, Prodr. Aroid. p. 196. 
Costa Rica, San José (Hoffmann). 
B. wendlandii, Engler in DC. Monogr. Phanerog. ii. p. 485. 
Acontias wendlandii, Schott in Caster. Bot. Zeitschr. 1858, p. 178, et Prodr. Aroid. p. 195. 
Costa Rica (Wendland). 
3. Xanthosoma jacquini, Schott, Melet. i. p. 19, Syn. Aroid. p. 57, et Prodr. 
Aroid. p. 183; Engler in DC. Monogr. Phanerog. ii. p. 470. 
Caladium xanthorrhizon, Boos, Cat. p. 348. 
Alotasia undipes, K. Koch et Bouché in Ind. Sem. Hort. Berol. 1854, Append. p. 5. 
Xanthosoma undipes, K. Koch in Bonplandia, 1856, p. 4. 
Xanthosoma sagittifolium, Liebm. Om Mexicos Aroideer, p. 5, non Schott. 
Sourn Mexico, Mirador (Liebmann).— VENEZUELA. Hb. Kew. 
4, Xanthosoma mexicanum, Liebm. Om Mexicos Aroideer, p. 5; Engler in 
DC. Monogr. Phanerog. ii. p. 479; Schott, Prodr. Aroid. p. 189. 
South Mexico, Trapiche de la Concepcion, near Comaltepec, Oaxaca, at 3000 feet 
(Liebmann). 
5, Xanthosoma pedatum, Hemsl. n. sp. 
Xanthosomati cubensi affinis, differt foliis glaucescentibus segmentis infimis semihastatis, spadice 
breviore crassioreque etc. 
Herba, ut videtur, acaulis, undique glaberrima, pedunculis in foliorum vaginis (saltem in specimine 
unico Salviniano) duobus. Folia solitaria?, subtus glaucescentia, longe petiolata; lamina 
pedato-quinquesecta, circa 15 poll. diametro, circumscriptione reniformia ; segmenta discreta, 
