BRITTON: STUDIES OF West INDIAN PLANTS 467 
Rondeletia calcicola sp, nov. 
A glabrous shrub about 2 m. high, the twigs slender. Leaves 
coriaceous, narrowly oblong to oblong-oblanceolate, 5~13 cm. 
long, 8-18 mm. wide, shining above, dull beneath, acute at the 
apex, attenuate at the base into petioles about 1 cm. long or less, 
loosely reticulate-veined with the midvein prominent on the under 
surface; inflorescence terminal, few-flowered; fruiting pedicels 
rather stout, 3-7 mm. long; capsule oblong or oblong-obovoid, 
glabrous, 1 cm; long, about twice as long as thick; fruiting calyx- 
lobes ovate-lanceolate, acute, I-1.5 mm. long. 
Wooded limestone plain, Coe’s Camp, Ensenada de Siguanea 
(Britton & Wilson 14842). 
Diodia ciliata Britton & Wilson, sp. nov. 
Stems perennial, prostrate, 4-6 dm. or more in length, rooting 
and partly buried in sand, densely pilose with whitish hairs on the 
younger growth; leaves elliptic to somewhat elliptic-obovate, 1.5-—3 
cm. long, 7-14 mm. broad, acute at the apex, cuneate to broadly 
cuneate at the base, the margin conspicuously and densely ciliate 
with rather stiff white hairs, yellowish green and glabrous above, 
the midvein and lateral veins inconspicuous, whitish-pilose beneath, | 
especially on the midvein, sessile; stipules ciliate; ovary 2-celled; 
fruit elliptic-obovoid, 3 mm. high, glabrous, or with few scattered 
appressed hairs on the back. 
In white sand, vicinity of Los Indios (Britton & Wilson 15347). 
Diodia arenicola Britton & Wilson, sp. nov. 
Perennial; stems ascending, I-1.5 dm. high, glabrous; leaves 
lanceolate, 6-14 mm. long, 2-3 mm. broad, acute at the apex, 
rounded or somewhat acutish at the base, glabrous or with few, 
stout, socibeahiae: fonts oo hairs above, glabrous beneath, 
mm. long; calyxlobes triangular- 
ovate, ciliate: ser 5 mm. high, the lobes ovate, obtuse; anthers 
ovate-lan ceolate; style 3-lobed; fruit ellipsoid, 2.5 mm. high, 1.2 
mm. broad, glabrous. 
Along arroyo, Los Indios, Isle of Pines (O. E. Jennings 355 in 
part, type); vicinity of Los Indios (Britton & Wilson 15812). 
Mitracarpum depauperatum Britton & Wilson, sp. nov. 
A diminutive, woody perennial, 2-5 cm. high, forming small 
tufts, the stems few-branched or simple, the internodes very short. 
Leaves narrowly linear, 6-15 mm. long, less than 1 mm. wide, 
