oe BRITTON: STUDIES OF WEST INDIAN PLANTS 
mm. long; flowers few, in small axillary clusters not longer than 
the leaves, or these terminating short leafy twigs; pedicels short, 
puberulent; calyx silky-pubescent, its lobes short, broad, obtuse; 
petals cuneate-spatulate, rounded at the apex, 3-3.5 mm. long; 
drupe oblong or narrowly oblong-obovoid, obtuse, about 8 mm. 
long and 4 mm. in diameter. 
Grassy plain, Aripo Savanna, Trinidad (Britton, Hazen and 
Freeman 2005, April 21, 1920). 
Acacia quadricostata sp. nov. 
woody vine, up to 8 m. long, the old stems 4-ribbed or 4- 
flanged, about 8 cm. thick near the base, the twigs 4-angled, armed 
with recurved prickles about 3 mm. long. Leaves 2-pinnate, 6-17 
cm. long; stipules wanting; petiole slender, bearing a sessile, 
circular gland; rachis glabrous, sometimes bearing a few minute 
prickles; rachilla very slender, angular; leaflets 35 pairs or fewer, 
sessile, linear-lanceolate, acutish, 6-8 mm. long, about I mm. 
wide, truncately inequilateral at the base, the midvein somewhat 
eccentric, the lateral veins few, glabrous, except for a characteristic 
line of yellowish hairs on the underside of the midvein near the 
base; legume linear-oblong, flat, densely puberulent, 5-9 cm. 
long, nearly 2 cm. wide, narrowed at the base with a short stipe, 
acute and short-tipped; seeds orbicular, dark brown, about 7 mm. 
in diameter. 
Hillside, Chacachacare Island, Trinidad (Britton, Freeman and 
Watts 2685), in fruit April 3, 1921. The prickles are persistent 
upon the old stems and branches. 
Erythrina pallida Britton and Rose sp. nov. 
A small tree, 4 meters high; young growth puberulent; second 
year growth glabrate with shining gray bark; spines at base of 
leaves stout, reflexed, 6-8 mm. long; leaves large; rachis 2 cm. 
long or more, glabrous; leaflets 3, broadly ovate, sometimes 
obliquely so, acuminate, 12-15 cm. long, green above, very pale 
beneath, glabrous on both sides at least when mature; inflores- 
cence subsessile, paniculate, 1-2 dm. long; pedicels stout, about 
1 cm. long; calyx 1.5 cm. long, nearly truncate, except a small 
protuberance on the lower side; corolla salmon-colored, narrow, 
7 cm. long; fruit with a long slender stipe 3 cm. long; tipped with 
a rigid persistent style, 2 cm. long, moniliform, 8-10-seeded; seed 
8 mm. long, 6 mm. broad. 
Hillsides and roadsides, Trinidad. Type from roadside near 
Carenage (Britton 2656), April 4, 1921. Commonly planted as 
a fence tree in Trinidad. 
