Pomona College Journal of Economic Botany 



255 



aa. Male flowers with 6 stamens, the filaments united to form a columnar body 

 within the corolla, free and radiating above, anthers sagittate. 



Calyptrogyne 



Tribe II— COCOINEAE 



Ovary 3 celled (in the species here described). Fruit with 1-3 seeds, often 

 1-2 of the cells obliterate; endocarp bony, marked by 3 pores, each corresponding 

 to the position occupied or which ought to be occupied (morphologically) by the 

 embryo in the cells. 



a. Flowers in numerous glomerules of 3, one female between two males, at least 

 in the lower part of the branches. Female flowers having a gamopetalous 

 corolla. Bactris 



aa. Female flowers considerably larger than the males and placed on the lower 

 part of the branchlets ; corolla with imbricate petals. Male flowers 

 in notches, approximate in the upper part of the branchlets. Acrocomia 

 II. Leaves flabellate, and radiately divided (never pinnate). 



Tribe III— CORYPHEAE 

 Sub tr. I — Eucorypheae 

 Ovarv formed by 3 carpels, free from the base, or more or less united together, 

 a. Ovary formed by 3 carpels, completely united together, and with 3 distinct 

 uniovulate cells. The fruit usually formed by the development of only 

 one cell and with the remains of the style lying close to its base. Leaves 

 with unarmed petioles. Sabal 

 aa. Ovary formed b)'^ 3, more or less independent carpels. 



1. Petiole more or less spinous on the edges. Seed with homogenous 



albumen. Acoelorhaphe 



2. Petiole spinous on the edges. Seed with ruminate albumen. Copernicia 



3. Petiole smooth on the edges. Seed with homogenous albumen. 



Pritchardia 



Sub. tr. II — Thrinaceae 

 Ovary formed by a single carpel, unicelled and uniovulate. 

 a. Seed having an even surface; albumen equable but penetrated from its basal 

 part, more or less deeply, or even completely transversed, by an intrusion 

 of the integument. 



b. Stamens 6 "with almost sessile reversed anthers. Hemithrinax 

 bb. Stamens 6" (or .'5-7), with slender subulate filaments. Thrinax 

 aa. Seed marked by 5-6 vertical grooves and more or less distinctly lobed- 

 cerebriform. Coccothrinax 



OREODOXA Kunth 



(Non Willd.) Kunth in Humb. et Bon])!. Nova gen. et sp. PI. I, p. 244, edit, 

 min. p. 305 (1815); Mart. Hist. nat. Palm. Ill, p. l66. Roystonea O. F. Cook 

 in Bull. Torrey bot. Club, IQOl, p. 549. 



