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, 3-3.5^111. 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. 



A small 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 



