502 Britton: Studies of West Indian plants 



Distribution: Cayo Romano, Camaguey: Bahamas Jamaica. 

 Closely related to Tricera Vahlii (Baill.) Britton [Buxus Vahlii 

 Baill.] of Porto Rico and St. Croix. 



15. Tricera microphylla Griseb. Nachr. Ges. Wiss. Goetting. 



1865: 163. 1865 

 Buxus Wrightii Muell. Arg. in DC. Prodr. 61 1 : 17. 1869. 



Type locality : Western Cuba. 



Distribution : Known only from the type specimens collected 



by Wright. 



16. Tricera Leoni sp. nov. 



A shrub, or small tree, up to 4 m. high, glabrous throughout, 

 the slender twigs densely leafy. Leaves linear to linear-oblong, 

 coriaceous, shining, 2 cm. long or less, 2-4 mm. wide, spinulose- 

 acute at the apex, narrowed at the base, the midvein faintly dis- 

 tinguishable above, rather prominent beneath, the lateral vena- 

 tion wholly obscure, the petioles I 1.5 mm. long; inflorescence 

 terminal, short-stalked; bracts ovate, acute, about 1 mm. long; 

 pedicels of the staminate flowers 1.5-2 mm. long; staminate 

 perianth-segments oblong-lanceolate, acute, 2-2.5 mm. long, 

 filaments a little longer than the anthers; capsule globose-oblong; 

 glabrous, 3 mm. long, the separated, persistent styles 2 mm. long. 



Hill north of Monte Catalina, northeast of San Diego de los 

 Banos, Pinar del Rio {Brothers Leon & Charles 4874, type) ; 

 barren specimens from the southern slope of Monte Cajalbana, 

 Pinar del Rio (Brothers Leon & Charles 4943), with narrower 

 leaves than the type, are provisionally referred to the same species. 



17. Tricera revoluta sp. nov. 



A much-branched shrub, 3-10 dm. high, the twigs densely 

 leafy, the internodes only 1-2 mm. long. Leaves linear-oblanceo- 

 late, coriaceous, 12-20 mm. long, 3-5 mm. wide, strongly revolute- 

 margined, sharply cuspidate-mucronate at the apex, attenuate 

 at the base, the midvein elevated beneath, the venation otherwise 

 wholly obscure, the petioles about 2 mm. long; inflorescence few- 

 flowered in the upper axils, pubescent; staminate flowers nearly 

 2 mm. long, and nearly as long as their stout pedicels; capsule 

 subglobose, 5-6 mm. long, pubescent, shorter than the persistent, 

 separated styles. 



Dry, rocky situations, serpentine hills near mouth of Rio 

 Yamaniguey, Oriente (Shafer 4247, type); between Camp La 



