BRITTON: STUDIES OF WEsT INDIAN PLANTS 7 
13. Pithecolobium trinitense sp. nov. 
A tree up to 10 m. high; young twigs, petioles and rachises 
densely brown- puberulent. Leaves 10-15 cm. long; glands cir- 
cular, I mm. in diameter; petioles 1.5 cm. long or less; pinnae 
6-8 pairs, approximate; leaflets 12-16 pairs on each pinna, oblong, 
chartaceous, slightly inequilateral, 5-7 mm. long, 3 mm. wide or 
less, rounded at the apex, obliquely obtuse at the base, glabrous 
or nearly so and dark green above, pale, and pubescent beneath, 
at least on the veins, the midvein prominent; peduncles densely 
puberulent when young, glabrous when old; young flower-heads 
densely puberulent; flowers unknown, apparently capitate; oe 
curved into a nearly complete circle, about 6 cm. long and 7 m 
wide, somewhat constricted between the seeds; seeds blue, Be a 
orbicular-obovoid, somewhat compressed, 5 mm. long. 
Hillside, El Porvenir to Aguacate, Trinidad Mountains, Santa 
Clara, at 700-900 m. altitude, March 10, 1910 (Britton & Wilson 
53406, type). 
14. Pithecolobium (?) guantanamense sp. nov. 
A tree, 10 m. high with flexuous twigs, the foliage sparingly 
villous-pubescent. Leaves 6-8 cm. long, petioles slender, 1 cm 
long or less; glands scutellate, 0.5 mm. in diameter; pinnae 2 
pairs; leaflets 20 pairs or fewer, linear, chartaceous, 5-7 mm. long, 
I-I.5 mm. wide, inequilateral, pale green but somewhat darker 
above than beneath, acute at the apex, obliquely obtuse at the 
base, the few veins prominent beneath; flowers unknown; pod 
compressed, glabrous, chartaceous, dehiscent, doubly coiled, 6-8 
cm. long, 7-8 mm. broad over the seeds, constricted between them, 
the coils about 2 cm. broad; immature seeds suborbicular, some- 
what flattened, 4 mm. in greatest diameter. 
Bank of a water course, United States Naval Station, Guanta- 
namo Bay, Oriente, March, 1909 (Britton 2051). 
15. PITHECOLOBIUM ARBOREUM (L.) Urban, Symb. Ant. 2: 259. 
1900 
Mimosa arborea L. Sp. PI. 519. 1753. 
Pithecolobium filicifolium Benth. in Hook. Lond. Journ. Bot. 3: 
205. 18 
? Mimosa filicifolia Lam. Encyct. 3:34. 2783. 
Hillsides, river-banks and woodlands at lower and middle 
elevations, ascending, in Oriente, to at least 330 m.; all provinces 
