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, muc 
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 & 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 2439). 
50. UNDESCRIBED SPECIES FROM CUBA 
Schoepfia cubensis Britton & Wilson, sp. nov. 
A slender, glabrous shrub, 2.5-4 m. 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 
mid vein, strongly divergent; peduncles 0.81.2 cm. long; fruit 
sessile, ellipsoid, 8 mm. long, 7 mm. wide. 
Camp La Gloria, Oriente (Shafer 8278). 
Cassia scleroxyla sp. nov. 
_ Aslender tree, about 8 m. high, with smooth bark and exceed- 
ingly hard wood, the young twigs loosely appressed-pubescent. 
