Britton: Studies of West Indian plants — XI 53 



Clusia aripoensis Britton, sp. nov. 



A tree, with slender twigs. Leaves narrowly obovate, sub- 

 coriaceous, 7-8 cm. long, the apex obtuse, the base cuneate, the 

 rather closely pinnate venation prominent on the under side, 

 almost wholly obscure above, the rather slender petioles 1-2 

 cm. long, stigmas 5; young fruit obovoid, 2.8 cm. long, 2 cm. in 

 diameter. 



Forest, Heights of Aripo Trinidad (Trinidad Herbarium 9785, 

 Broadway), January 10-26, 1922. 



Stylogyne tenuifolia Britton, sp. nov. 



A tree up to about 10 m. in height. Leaves elliptic, mem- 

 branous, 8-20 cm. long, glabrous, the base narrowed, the apex 

 rather abruptly acuminate, the midvein impressed above, prom- 

 inent beneath, the stout petioles 5-12 mm. long; inflorescence 

 lateral and terminal, 5 cm. long or less, short-paniculate; bract- 

 lets oblong-lanceolate, 2-3 mm. long, deciduous; pedicels nearly 

 filiform, 5-10 mm. long; calyx-segments broadly ovate, rounded, 

 about 2 mm. long; corolla about twice as long as the calyx; fruit 

 globular, white, 6-7 mm. in diamater. 



Forests at higher elevations in the northern mountain range, 

 Trinidad. Type from Mt. Tocuche (Britton, Hazen and Mendle- 

 son 1341) ; collected also by Mr. Broadway on the Heights of 

 Aripo (Trinidad Herbarium, 9837, 9840). 



Prestonia Fendleri N. E. Brown, sp. nov. 



Stem climbing, the flowering parts with internodes 4.5-12 cm. 

 long, 1-2 mm. thick, thinly puberulous with minute curved hairs 

 on the youngest parts, becoming glabrous and brown with age. 

 Leaves with petioles 6-15 mm. long and blades 5-10 cm. long 

 and 3-7 cm. broad, elliptic, subequally and broadly rounded at 

 both ends, with a small abrupt point 1-2 mm. long at the apex, 

 with about 5 ascending curved primary veins on each side of the 

 midrib, inarching at their tips and forming loops near the 

 margin. Racemes axillary, the axis 1-2 cm. long in the example 

 seen, bearing 15 or more flowers on the upper half, flowerless 

 below, thinly and minutely puberulous. Bracts minute, less 

 than 1 mm. long. Pedicels 12-15 mm. long, slender, puberulous. 

 Sepals 5 mm. long and 1.5-2 mm. broad, lanceolate, acute, thinly 

 puberulous. Corolla pubescent at the top of the tube inside, 

 otherwise glabrous; tube 15-17 mm. long and about 4 mm. in 

 diameter, cylindric, with the mouth, where the lobes pass from 

 it, raised into an erect ring I mm. high; inside this ring arise 5 

 linear erect exserted processes (coronal-lobes) 4 mm. long; lobes 



