302 Britton: SrubDiES OF West INDIAN PLANTS 
3. VIBURNUM ALPINUM Macf. Fl. Jam. 2: 201. 1850 
Hillsides and woodlands at middle and higher elevations in 
both relatively dry and wet districts, ascending to at least 1800 
meters in the Blue Mountains. Erroneously regarded by Grise- 
bach as identical with V. glabratum H.B.K. of Mexico and South 
America. 
14. HITHERTO UNDESCRIBED SPECIES OF JAMAICA 
Thrinax Rex Britton & Harris, sp. nov. 
Trunk up to 20 meters high, cylindric, 2-2.5 dm. in diameter, 
sometimes swollen at the base. Leaf-blades of middle-sized trees 
3 m. broad, silvery beneath, those of young plants sometimes 4 m. 
broad; leaf-segments 40-50, united to about one half, 3-5 cm. 
wide, notched at the apex into rigid acuminate narrow lobes 1-3 
cm. long, revolute-margined, the midrib prominent on the under 
side; petioles very stout, compressed, 2-edged, as long as the 
blades or longer; ligule triangular, acute, 2-2.5 cm. long; in 
florescence glabrous, much shorter than the leaves; bracts aeléne. 
puberulent, with a triangular-acute apex; ultimate branches of 
the inflorescence rather stout, 10-12 cm. long; pedicels stout, 
I.5-2 mm. long, about twice as long as the triangular acuminate 
bractlets; calyx hemispheric-campanulate, minutely toothed; fruit 
subglobose, 6-7 mm. in diameter; seeds brown, globular, shining, 
very nearly smooth, 5 mm. in diameter. 
Eastern slopes of the John Crow Mountains at 450 to 600 
meters altitude (Britton 4151; Harris & Britton 10,750). 
Chamaecrista fasciata sp. nov. 
Herbaceous, the roots apparently annual, the stems slender, 
erect, little-branched, 5-10 dm. high, more or less pubescent with 
long curled hairs. Leaves 8 cm. long or less, short-petioled; 
leaflets 20-40, linear-lanceolate, inequilateral, rounded at the 
base, acute and aristulate at the apex, strongly veined, ciliolate, 
but otherwise nearly glabrous, to-12 mm. long, 1.5—2 mm. wide; 
stipules lanceolate-attenuate, Sy veined, 8-10 mm. long; 
gland scutellate, sessile, 0.5 mm. wide, borne on the petiole below 
the lowest pair of leaflets; inane a little shorter than the 
petioles, villous, the bracts ovate-acuminate, about 4 mm. long; 
sepals lanceolate, acuminate, villous on the back, about one half 
as long as the petals; flowers 1.5 cm. broad; ovary and young 
pod densely long-villous; mature pod linear, a little curved, some- 
