14 Britton: Studies of West Indian plants 



reticulate-veined, glabrous, and with impressed midvein above, 

 strongly reticulate-veinedj minutely scurfy and with prominent 

 midvein beneath, the petioles 3-6 mm. long; staminate flowers 

 racemose-spicate in the upper axils, the inflorescence 2-3 cm. long; 

 bracts lanceolate, acute, about 1.5 mm. long; pedicels 1-2 mm. 

 long; buds subglobose, lepidote, 1 mm. in diameter. 



Rocky banks and hillsides, mountains of northern Oriente. 

 Type collected at Arroyo del Medio, above the falls, 450-550 m. 

 alt. {Shafer 3466). 



Similar to L. revolutus, but the venation of the leaves is quite 

 different. In L. revolutus only the pistillate inflorescence is 

 known ; in L. saxicola only the staminate. 



5. Leucocroton angustifolius sp. nov. 



A much-branched, spreading shrub, about 6 dm. high, the 

 twigs bearing distant leaf-scars. Leaves scattered, coriaceous, 

 glabrous, linear or linear-oblong, 5-10 cm. long, 13 mm. wide or 

 less, revolute-margined, rounded and mucronulate or emarginate 

 at the apex, narrowed at the base, the midvein impressed above, 

 prominent beneath, the primary lateral veins numerous, diverging 

 at nearly right angles from the midvein, both surfaces reticulate- 

 veined, the petioles 4-6 mm. long; pistillate flowers solitary at 

 the ends of clustered, terminal, slender, scaly, bracted peduncles 

 2-3 cm. long; bracts lanceolate, numerous, acute, ascending, 1.5 

 mm. long; calyx-segments lanceolate, similar to the bracts; ovary 

 depressed-globose, obtusely 3-lobed, lepidote; styles stout, re- 

 curved. 



Rio Guayabo, above the falls, Oriente, 450-550 m. alt. {Shafer 



3626). 



6. Leucocroton (?) linearifolius sp. nov. 



A much-branched shrub about 6 dm. high, the twigs short, 

 stiff, covered by leaf-scars. Leaves densely clustered at the ends 

 of the twigs, coriaceous, glabrous, linear, 3-6 cm. long, 3-5 mm. 

 wide, shining on both sides, emarginate at the apex, gradually 

 narrowed to the base, short-petioled, the midvein impressed 

 above, prominent beneath, the lateral veins very numerous and 

 close together, prominent on both surfaces, diverging nearly at 

 right angles to the midvein, simple, or forked; staminate flowers 

 few, in short, solitary slender-peduncled racemes shorter than 

 the leaves, the pedicels filiform, 2 mm. long, the bractlets linear- 

 lanceolate; bud of the staminate flower globose, I mm. in diameter. 



Rocky bank of river at Camp La Barga, Oriente, 450 m. 

 alt. {Shafer 4144). 



