Britton: Studies of West Indian plants 31 



leaves acute at both ends, bipartite, persistent, obtuse stipules; 

 corymbose peduncled flowers, the calyx truncate, with five short 

 teeth. The genus of this plant was questioned by A. Richard 

 (in Sagra, Hist. Cub. ii : 13), and I do not know any species which 

 answers to the description. 



Rondeletia americana L. Sp. PI. 172. 1753 



This, the type of the genus, is also recorded by De Candolle 

 as found at Havana by Ossa, and Grisebach (Fl. Br. W. I. 327) 

 mentions it as Cuban. I know the plant only from St. Vincent 

 and Jamaica. 



Rondeletia laevigata Ait. Hort. Kew. ed. 2, i: 366. 1810 



De Candolle mentions this also as found at Havana, but no 

 species answering to the description is known to me from Cuba; 

 Grisebach (Fl. Br. W. I. 328) indicates that it is from the island 

 of Trinidad. 



Rondeletia leptacantka DC. Prodr. 4: 410. 1830 



Collected by Ossa, near Havana, according to De Candolle. 

 Described as a plant with opposite spines, broadly oval, subacute 

 leaves, the twigs and leaves subpilose when young, the slender 

 peduncle as long as the leaves or longer, three- to five-flowered at the 

 apex. No species of Rondeletiaknownto me answers the description. 

 Grisebach (Cat. PI. Cub. 133) refers the plant to Chomelia fascicu- 

 lata Sw. [Anisomeris fasciculata (Sw.) Schum.], but this disposal 

 of it is not satisfactory. 



57. THREE ERIOCAULONS FROM THE ISLE OF PINES 



Eriocaulon arenicola Britton & Small, sp. nov. 



Plants 4-26 cm. tall, the scapes solitary or usually several 

 together; leaves ascending or spreading, 1-8 cm. long, linear- 

 attenuate, convex beneath, slightly concave above, glabrous; 

 scapes slender, mostly 6-angled, slightly spirally twisted, each 

 subtended by an obliquely opened sheath which is shorter than 

 the leaves; heads dense, at first depressed-globose, later sub- 

 globose or ovoid-globose, becoming about 5 mm. in diameter, 

 pubescent, whitish-gray; bracts of the involucre cuneate to obo- 

 vate, the outer ones about 1.5 mm. long; flowers numerous, 



