466 BRITTON: STUDIES OF WeEsT INDIAN PLANTS 
opposite, thick-coriaceous, ovate to orbicular, flat, 1-3.5 cm. long, 
rounded or obtuse at the apex, cordate or subcordate at the base, 
bright green and shining above, pale green and dull beneath, 
densely punctate, the midvein prominent, the lateral veins faint, 
the stout petioles 1-2 mm. long; peduncles rather stout, somewhat 
longer than the leaves; inflorescence cymose, few- to several-flow- 
ered; young fruit sessile, subglobose, 2 mm. in diameter, the calyx- 
limb 2 mm. broad. 
Pine-lands, central districts. Type from north of Los Indios 
(O. E. Jennings 390). 
Related to C. nummularia Berg. of Hispaniola, C. Maxoni 
Britton & Urban of Jamaica, and C. Boldinghi Urban of St. Martin. 
Evolvulus arenicola Britton & Wilson, sp. nov. 
A diminutive perennial, with a slender, woody root, the few or 
solitary, simple or few-branched stems slender, appressed-pu- 
bescent, 2-5 cm. long, ascending or nearly prostrate. Leaves 
ovate to elliptic, 9-15 mm. long, puberulent or glabrate above, 
appressed-pubescent beneath, mostly obtuse or rounded at both 
ends, the midvein faint, the lateral veins wholly obscure, the pu- 
bescent petioles 1-2 mm. long; flowers 1 or 2 at the ends of the 
_ Stems or branches; pedicels 5-8 mm. long, pubescent; sepals linear- 
lanceolate, acuminate, villous, 5 mm. long; corolla white, rotate, 
9-12 mm. broad; obscurely lobed; stamens about one-half as long 
as the corolla; styles deeply 2-cleft; capsule subglobose, shorter 
than the sepals. 
White sand, vicinity of Los Indios (Britton & Wilson 14190): 
Gerardia pinetorum Britton & Wilson, sp. nov. 
ate, 44.5 mm. long, 0.5-0.8 mm. broad, ciliolate; corolla rose- 
pink, glabrous, the tube 
obovate, 4.5-8 mm. long, 2.5-5 mm. broad. 
Along the Los Indios River above Los Indios (O. E. Jennings 
456). 
