﻿Britton: Studies of West Indian plants 515 



vein, faint above, rather prominent beneath, the ultimate venation 

 coarsely reticulated, the petioles about i cm. long, the ochreae 

 4-5 mm. long; racemes slender, simple, minutely puberulent, 

 6-12 cm. long; ochreolae subtruncate, 0.5 mm. long, about as 

 long as the bracts; flowering pedicels spreading, 1-3 at each 

 ochreola, i mm. long; perianth about 1.5 mm. long, its lobes 



Wooded hillside, Tea Gully near Newmarket, Jamaica {Britton 

 1592)' 



Portulaca caulerpoides Britton & Wilson, sp. nov. 



Perennial, prostrate, forming tufts 8-12 cm. in diameter; 

 stems slender, branched, hairy in the axils. Leaves obovoid, 

 3-5 mm. long, 2-3 mm. broad, not at all flattened, rounded at the 

 apex, narrowed at the base, subsessile, glabrous, shining, with 

 labyrinthine or tortuous mottling; flowers terminal, solitary, 

 sessile; sepals oval; petals pale yellowish-white, broadly obovate, 

 2.5-3 mm. long, 2-2.5 mn^- broad, notched at the apex; seeds 

 reniform, black, 0.5 mm. broad, rugulose. 



Limestone rocks, Cayo Muertos, Porto Rico (Britton, Cowell & 

 Brown 4990). 



The aspect of this species is similar to that of the green alga 

 Caulerpa clavifera, which occurs in the adjacent sea. 



Chamaecrista jamaicensis sp. nov. 



A shrub up to 1.3 m. high, the slender branches appressed- 

 pubescent. Stipules lance-subulate, acuminate, striate, 2-4 mm. 

 long; petioles 6 mm. long or less, bearing a nearly cyhndric gland 

 1-1.5 mni. long near the lowest pair of leaflets; rachis pubescent; 

 leaflets 4-8 pairs, dull, coriaceous, sessile, glabrous, oblong, or 

 the two upper ones oblong-obovate, 13-22 mm. long, 8 mm. wide 

 or less, prominently many-v^eined, obtuse and mucronate at the 

 apex, rounded at the base, inequilateral; peduncles bracted, 

 pubescent, i -flowered, shorter than the leaves; bracts lanceolate, 

 long-acuminate, striate, about 4 mm. long; sepals lanceolate, 

 acuminate, about i cm. long, broadly scarious-margined, pubescent 

 on the back with scattered, appressed hairs; petals obovate, 

 short-clawed, somewhat unequal, about as long as the sepals; 

 longer anthers 9 mm. long; pod obliquely linear, 3-4 cm. long, 

 about 6 mm. wide, pubescent with scattered hairs. 



Dry soil near the southern coast of Jamaica. Type from the 

 south slope of Long Mountain (Britton 811). 



Referred by Grisebach to Cassia polyadena DC., originally from 



