Britton: Studies of West Indian plants XII 5 



Piper aripoense Trelease, sp. now 



A shrub, 1 m. tall; flowering internodes moderately slender 

 and short, zig-zag, hirsute; leaves elliptic or oblanceolate-elliptic, 

 acuminate, more or less unequally cordulate, moderately large 

 (5X 14-9X20 cm.), pinnately nerved from below the upper fourth, 

 the nerves about 9X2, paler and appressed-hirsute on the 

 nerves beneath; petiole short (scant 5 exceptionally 10 mm.), 

 sometimes covered by the longer side of the base, hairy, winged 

 to the blade; spikes opposite the leaves, rather thick and short 

 (4 X 25 mm.), blunt; peduncle short (5 mm.), hirsute; bracts 

 concave-incurved, glabrous; flowers sessile, perfect; stigmas 3, 

 sessile; berries subglobose, glabrous. 



Heights of Aripo (Britton and Freeman 235 j, the type at 

 the New York Botanical Garden). 



Prestonia Brittoni N. E. Brown, sp. now 



Stem twining, 3 mm. thick at the flowering parts, glabrous. 

 Leaves opposite, stipulate; petioles in the specimen seen 15 mm. 

 long, glabrous; blade about 16 cm. long and 7V2 cm. broad, 

 oblong-elliptic, shortly" acute and apiculate at the apex, rounded 

 at the base, glabrous on both sides, with 8-9 primary veins on 

 each side of the midrib inarching and uniting 5 mm. from the 

 margin; stipules formed of a number of small teeth 1 mm. long 

 between the bases of the petioles. Cymes axillary pedunculate, 

 6-8 cm. in diameter, quite glabrous in all parts; peduncle 3-4 

 cm. long, nearly 2 mm. thick. Pedicels 15-25 mm. long. Sepals 

 10 mm. long and 4-5 mm. broad, oblong, obtuse, rather thick; 

 at the base of each sepal, between it and the corolla is a broadly 

 deltoid-ovate obtuse gland about 1 mm. long. Corolla only seen 

 in bud and in that condition the tube is 12 mm. long and 3 mm. 

 in diameter, cylindric, not dilated at any part, surmounted by a 

 truncate-based actite cone 5 mm. long and 6V2 mm. in dia- 

 meter formed by the contorted lobes; mouth of the tube raised 

 within into a distinct rim about 1 mm. high, without processes 

 or other appendages; lobes as unfolded from the bud 5 mm. 

 long and 6 mm. broad, suborbicular, entire. Stamens inserted 

 5 mm. below the top of the corolla-tube; filaments 1 mm. long; 

 anthers 5 mm. long, not or scarcely exserted. Ovary surrounded 

 by 5 large faintly crenulate or faintly toothed fleshy lobes. 



Heights of Aripo {Broadway iooog). 



Decastelma trinitense N. E. Brown, sp. now 



Stem twining, up to 2 mm. thick at the flowering part, with 

 internodes 2-3 cm. long, minutely puberulous, brown. Leaves 

 spreading; petiole 4-6 mm. long, minutely puberulous; blade 



