Britton: Studies of West Indies plants — XI 51 



base, palmately-veined, glabrous on both sides; petioles 0.5-1.5 

 cm. long; heads long-peduncled, the peduncles pubescent; 

 involucre subcylindric-campanulate, 5-6 mm. high, its bracts 

 oblong, glabrous, their tips acute or acuminate; pappus white, 

 4 mm. long; achene about I mm. long. 



Climbing on shrubs, Loma del Sabicu, Oriente {Leon 10751). 



Chaptalia montana Britton, sp. now 



Leaves oblanceolate-spatulate, thin, 4-7 cm. long, lyrate- 

 pinnatifid, the terminal lobe large, elliptic-obovate, obtuse, 

 apiculate, the lateral ones few, small, rounded, the upper surface 

 green and glabrate, the under grayish-lanate; scape filiform, 

 1.5-2.5 dm. long; head erect; involucre subcampanulate, its 

 bracts linear, acuminate, lanate below, the inner ones about 

 7 mm. long; achenes fusiform, 5.5-6 mm. long, the slender beak 

 longer than the body; pappus white. 



Sierra Maestra, Oriente {Leon 10802). 



65. UNDESCRIBED SPECIES FROM TRINIDAD 

 Bactris savannarum Britton, sp. nov. 



Trunk slender, up to 10 m. high, erect, copiously armed, like 

 the leaf-rachis, with nearly white, deflexed spines 1-5 cm. long, 

 which turn darker in age. Leaves about I m. long or longer, 

 petioled, the numerous, unarmed segments 2-4 dm. long, about 

 4 cm. wide or less, light green, paler beneath than above, the 

 base attenuate, the apex acuminate or acute, some of the upper 

 ones of young leaves confluent; spathe narrowly oblong, 2-3 

 dm. long-acuminate, densely appressed-bristly, the bristles 

 rather soft; inflorescence about as long as the spathe, its axis and 

 slender branches densely brown-villous; flowers numerous, nearly 

 white, about 4 mm. long; fruit orange, depressed-globose, small 

 for the genus, about 8 mm. in diameter, vertically striate; 

 fruiting calyx nearly flat, about 5 mm. broad, its lobes rounded, 

 striate. 



Aripo Savanna and its forest borders, Trinidad {Britton, 

 Broadway and Hazen 260, type; Trinidad Herbarium 9850, 

 Broadway) ; Professor L. H. Bailey has kindly sent us two 

 photographs of this palm taken by him in 1921. 



Pilea aripoensis Britton, sp. nov. 



Stems filiform, 4-7 cm. long. Leaves membranous, spatulate, 

 entire, i-nerved, 12 mm. long or less, the apex rounded, the base 

 cuneate, the filiform petiole somewhat shorter than the blade, 



