352 Britton : Studies 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 oblong, 

 puberulent, with a triangular-acute apex; ultimate branches of 

 the inflorescence rather stout, 10-12 cm. long; pedicels stout, 

 1.5-2 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 415 1; 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, 10-12 mm. long, 1.5-2 mm. wide; 

 stipules lanceolate-attenuate, strongly veined, 8-10 mm. long; 

 gland scutellate, sessile, 0.5 mm. wide, borne on the petiole below 

 the lowest pair of leaflets; peduncles 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- 



