AROIDEA, 419 
integra, acuminata, acuta, sinibus latiusculis rotundatis; segmenta intermedia et centrale 
ovata, basi truncata; segmenta infima semihastata, lobo basilari rotundato; omnia nervis 
lateralibus primariis pluribus sursum gradatim minus conspicuis, in nervum collectivum margine 
sat remotum conjunctis ; petiolus fere bipedalis, concolor, anguste vaginatus, in siccitate nullo 
loco 6 lineas crassus. Pedunculi quam folium multo breviores. Spatha 7-8 poll. longa, infra 
medium ventricoso-tubulosa, lamina lanceolata, acuta, spadix 2-24 poll. excedens, quam tubus 
longior, omnino floribus vestita. Spadiaz crassiuscula, cylindrica, vel leviter clavata, parte 
exserta mascula. Synandria 12-16 locellata, apice disciformia, sessilia. Ovarium multi- 
ovulatum. Fructus ignotus. 
GuATEMALA, Barranca Honda 3800 feet (Salvin). Hb. Kew. 
This is closely related to X. cubense, Engler (Acontias cubensis, Schott, but not 
Andromycia cubensis, Rich., which Engler cites as a synonym, though it is a very 
distinct plant); but it is readily distinguished by the segments of the leaves being 
divergent (not overlapping), and by the lower ones being half-hastate. The slenderer 
petiole is not mottled; and the stouter spadix is decidedly obtuse and relatively shorter. 
Further, the leaves of the present plant are glaucous beneath. Other differences may 
exist in the female flowers and fruit; but as they are in a partly decomposed state, we 
can only say that the ovules are numerous, all traces of the dissepiments having 
disappeared. 
6. Xanthosoma pilosum, K. Koch in Ind. Sem. Hort. Berol. 1855, Append. 
p. 2; Engler in DC. Monogr. Phanerog. ii. p. 479 ; Schott, Prodr. Aroid. p. 186. 
Costa Rica (Hoffimann).—CoLomBIA. 
7, Xanthosoma robustum, Schott in Gster. Bot. Wochenbl. 1853, p. 370, Syn. 
Aroid. p. 58, et Prodr. Aroid. p. 182; Engler in DC. Monogr. Phanerog. ii. p. 474. 
Sour Mxxico, Mirador (Liebmann), Orizaba (Bourgeau, 2417). 
8. Xanthosoma roseum, Schott in ister. Bot. Zeitschr. 1858, p. 178, et Prodr. 
Aroid. p. 180; Engler in DC. Monogr. Phanerog. ii. p. 475. 
Costa Rica, San José (Hoffmann). 
Also recorded from Guadalupe Island. 
9. Xanthosoma sagittifolium, Schott, Meletem. i. p. 19, Syn. Aroid. p. 56, et 
Prodr. Aroid. p. 179; Engler in DC. Monogr. Phanerog. ii. p. 469; Bot. Mag. t. 4989; 
Griseb. Fl. Brit. W. Ind. p. 511. 
Arum sagittifolium, Linn. Sp. Pl. ed. 2, p. 1869. 
South Mexico, valley of Cordova (Bourgeau, 1903).—West Inp1Es, from Cusa and 
Jamaica to Barpapos. Hb. Kew. 
4, PHILODENDRON. 
Philodendron, Schott, Meletem. i. p. 19; Benth. et Hook. Gen. Plant. iii. p. 978. 
An exclusively Tropical-American genus of about 120 known species. 
3h2 
