458 Britton: Studies of West Indian plants 



acuminate at the apex, cuneate at the base, the slender petioles 

 6-12 mm. long; peduncle 1-2 cm. long, slender in flower, much 

 thickened in fruit; calyx 2 cm. long, deeply 2-lobed; corolla sub- 

 campanulate, 4 cm. long, yellowish white, reticulate-veined, its 

 broadly ovate, entire, acute or blunt lobes about one fourth as 

 long as the tube; fruit narrowly oblong, 10 cm. long, 3.5 cm. in 

 diameter, terete, pointed at the apex, truncate at the base. 



River-valley forests, mountains of western Porto Rico. Type 

 from Rio de Maricao, 500-600 m. alt. {Britton, Stevens 6f Hess 



2455)- 



Mikania Stevensiana sp. nov. 



Climbing to a height of 5 m., the branches glabrous, striate, 

 nearly terete, the twigs angular, sparingly pubescent. Leaves 

 triangular-ovate in outline, firm in texture, brittle when dry, 5 cm. 

 long or less, very scabrous and sparingly short-hispid above, 

 pubescent on the elevated veins beneath, 5-nerved, sharply 3-lobed, 

 the middle lobe triangular-lanceolate, long-acuminate, dentate, 3 

 or 4 times as long as the acute, entire or sparingly toothed, lateral 

 ones; petioles sparingly pubescent, 1-2 cm. long; inflorescence 

 corymbose-paniculate; heads peduncled; bracts of the involucre 

 linear, acute, 7 mm. long; achenes angled, glabrous, 5 mm. long; 

 pappus-bristles about 40; corolla 7 mm. long, as long as the pappus, 

 its lobes acute. 



Wooded valley, Maricao River, above Maricao {Britton & 

 Cowell 4225, type; Britton, Stevens & Hess 2430). 



50. UNDESCRIBED SPECIES FROM CUBA 

 Schoepfia cubensis Britton & Wilson, sp. nov. 



A slender, glabrous shrub, 2.5-4 "i- tall, the young twigs com- 

 pressed, longitudinally ridged, often flexuose, glabrous. Leaves 

 elliptic to oval, 2-3.4 cm. long, 1.5-2.8 cm. broad, short-petioled, 

 entire, glabrous, rounded at the apex, equilateral and rounded or 

 occasionally subcordate at the base, lustrous and rather indistinctly 

 veined on both surfaces; principal veins 5 or 6 on each side of the 

 midvein, strongly divergent; peduncles 0.8-1.2 cm. long; fruit 

 sessile, ellipsoid, 8 mm. long, 7 mm. wide. 



Camp La Gloria, Oriente {Shafer 8278). 



Cassia scleroxyla sp. nov. 



A slender tree, about 8 m. high, with smooth bark and exceed- 

 ingly hard wood, the young twigs loosely -appjessed-pubescent. 



