BRITTON : STUDIES OF WEsT INDIAN PLANTS 7 
18. UNDESCRIBED SPECIES FROM JAMAICA 
Acalypha jamaicensis sp. nov. 
A shrub, 2-2.7 m. high, the branches slender, the young ones 
densely pubescent. Leaves oblong-lanceolate to oblong-oblance- 
olate, thin in texture, rather strongly pinnately veined, 9-15 cm. 
long, 3-5 cm. wide, sharply serrate all around, long-acuminate at 
the apex, subcordate at the base, sparingly pubescent above, 
rather densely pubescent on the veins beneath, the slender pu- 
bescent petioles 4 cm. long or less; flowers apparently monoecious; 
staminate spikes dense, pubescent, slender-stalked, about 3 cm. 
long, the short narrow bracts ciliate; pistillate spikes 3-6 cm. long, 
their bracts ciliate and pubescent, especially on the veins, 5-7- 
cleft to about the middle, the lobes obtuse or acutish; style dis- 
sected into filiform segments; fruit compressed, pubescent, 2 mm. 
broad. 
Woodlands, Upper Clarendon, Jamaica. Type, Harris 10842, 
collected at Leicesterfield, January 28, 1910. 
Related to A. pruinosa Urban, a nearly glabrous species with 
more deeply cleft pistillate bracts. 
- Actinostemon jamaicensis sp. nov. 
A tree, up to 10 m. high, with slender, somewhat drooping 
branches, glabrous throughout. Leaves ovate to oblong-lanceo- 
late, thin, 5-7 cm. long, 2-3.5 cm. wide, acuminate at the apex, 
rounded or narrowed at the base, shining above, pale beneath, 
pinnately veined, the very slender petioles 1 cm. long or less; 
staminate inflorescence interruptedly spicate, slender, 4-5 cm. 
long, flowers opposite the upper leaves; stamens 12, in clusters 
of 3, the united part and the free part of the filaments about equal 
in length; fruit depressed-globose, 9-12 mm. broad, 8-9 mm. high, 
both apex and base slightly sunken; seed globose, 3-3.5 mm. in 
diameter. 
Thickets, Grant’s Pen, near Yallah’s Bay, Jamaica, May 26, 
1911, Harris 10936, type; also at the same station, Harris 10643, 
10818, and 10826, Britton 3470 and 3913; coastal thickets, Morant 
Point, Britton 4103. 
Clusia clarendonensis sp. nov. 
Asmall tree, up to 5 meters high. Leaves thick, rigid, obovate, 
10 cm. long or less, 5-7 cm. wide, rounded at the apex, narrowed 
at the base, finely but rather strongly pinnately veined, the stout 
