— 362 — 



il. Leaves pinnatifid or pin- 



nate; ovules anatropous. 

 (18) Schizocasia. 

 \2. Leaves otherwise, or the 

 ovules orthotropous. 



kl. Ovules basai. 



(19) Alocasia. 

 k2. Ovules pariétal. 



(20) -Colocasia. 



h2. Spadix fertile and floriferous 



quite to the apex. 



il. Styles broad, mutually con- 



tiguous. (21) Xanthosoma. 



il. Styles wanting or présent 



but then narrow, mutually 



remote. 



kl. Leaves rather parallel- 

 veined, without col- 

 lective veins between 



the primary ones. 

 (25) Philodendron. 



k2 Leaves reticulate-vein- 

 ed, coinmonly with 

 a collective vein bet- 

 ween the primary ones. 



11. Ovules really 

 pariétal. 



(20) Colocasia. 



12. Ovules on very 

 prominent par- 

 iétal placentae. 

 (22) Caladium. 



d2. d" Flowers consisting of single or grouped free stamens. 

 el. Leaves reticulate-veined. 



fl. Spadix with the apex adnate to the spathe; 

 aquatics. (39) C/yptocoryne. 



f2 Spadix with the apex free from the spathe; 

 terrestrials. 



gl . Spadix 2-sexual ; d and $ inflorescences 

 separated by a flowerless space or 

 (and) tuberculiform, subulate, linear, 

 lanceolate or clavate protubérances 

 (pistillodes. synandrodes) of the rachis. 

 hl. Leaves pedatipartite, not coet- 

 aneous with the flowers, i.e. ap- 

 pearing after the flowering. 



(41) Sauromatum. 



