Britton: Studies of West Indian plants 



503 



Barga and Camp San Benito, about 1,000 m. alt., Oriente (Shafer 

 4472). 



18. Tricera foliosa sp. nov. 



A low, much-branched shrub, the slender twigs densely leafy. 

 Leaves linear-oblanceolate, subcoriaceous, glabrous, 10-15 mm. 

 long, 2 mm. wide or less, obtuse and often minutely mucronulate 

 at the apex, long-attenuate to the base, the midvein impressed 

 above, slightly elevated and channeled beneath, the lateral vena- 

 tion wholly obscure, the margins slightly or scarcely revolute, the 

 petioles 1-2 mm. long; inflorescence axillary, shorter than the 

 leaves; staminate flowers white, about 1.5 mm. long, as long or 

 longer than their pubescent petioles; bracts lanceolate, about 1 

 mm. long; capsule subglobose, densely and finely pubescent, 

 about 3 mm. in diameter, the separated persistent styles about 

 2 mm. long. 



Among rocks near water, Camp La Gloria, south of Sierra 

 Moa, Oriente (Shafer 8256, type) ; on rocks, vicinity of Camp San 

 Benito, Oriente (Shafer 4073). 



41. THE GENUS PLUMIERA L. IN 



Leaves narrowly linear, 1.7 mm. wide or less. 

 Leaves oblong to elliptic-oblanceolate or obovate, 1-8 cm. wide. 

 Leaves densely lanate or pubescent beneath. 

 Corolla-lobes narrowly obovate. 

 Corolla-lobes broadly elliptic-obovate. 

 Leaves glabrous, or sparingly pubescent beneath. 

 Petioles short, 1 cm. long or less. 



Leaves obovate or oblanceolate, the lateral venation 



obscure. 

 Leaves narrowly oblong, the lateral venation promi- 

 nent. 

 Petioles slender, mostly 2-4 cm. long. 



Leaves glabrous beneath, their margins not involute. 

 Corolla-lobes 2.5-3.5 cm. long, 1-1.5 cm. wide; 



venation widely spreading. 

 Corolla-lobes 1.5-2.5 cm. long. 



Venation of the leaves ascending, not prominent 



beneath; corolla-lobes obovate. 

 Venation of the leaves widely spreading, promi- 

 nent beneath; corolla-lobes oblong-oblanceo- 

 late. 

 Leaves pubescent on the veins beneath, their margins 

 involute. 



CUBA 



I. P. filifolia. 



2. P. sericifolia. 



3. P. lanata. 



4. P. clusioides. 



5. P. nipensis. 



6. P. emarginata. 



7. P. obtusa. 



8. P. venosa. 



9. P. trinitensis. 



