Part 2, 1921] RUBIACEAE 125 



the pedicels in fruit 2-3 mm. long; calyx-lobes oblong-triangular, obtuse or acutish, 0.8 mm. 

 long; capsule obovoid, 4.5-5.5 mm. long, reddish-brown, densely puberulent when young, 

 glabrate in age. 



Type collected on a dry serpentine hill. Loma Santa Teresa, near Ivl Yunque, Oriente, Cuba. 

 December 2, 1910, J. A. Shafer 7746 (herb. N. Y. Bot. Card.). 



23. Exostema velutinum Standley, sp. no v. 



Tree, 6 meters high, the branchlets slender, gray, lenticellate, densely short-pilose, the 

 internodes equaling or shorter than the leaves; stipules deltoid, 1-2 mm. long, acute, brown, 

 puberulent; petioles stout, 3-7 mm. long, densely short-pilose; leaf-blades ovate-oval, oval, 

 or rounded-ovate, 3-5 cm. long, 1.8-3.5 cm. wide, broadly rounded at the base, acutish at the 

 apex, subcoriaceous, green above, lustrous, glabrous, the venation plane or the costa sub- 

 impressed, paler beneath, densely velvety-pilose with short whitish hairs, the venation prom- 

 inent, the lateral veins 3 or 4 on each, arcuate-ascending, the margin plane or nearly so; in- 

 florescence terminal, cymose-corymbose, densely many-flowered, 3.5-7 cm. wide, the pedicels 

 stout, 1-2 mm. long, short-pilose; calyx-lobes 4, minute, triangular-subulate; capsule obovoid, 

 3 mm. long, brown, short-pilose. 



Type collected at border of mangrove swamp, Rio San Juan, Santa Clara, Cuba, March, 1910, 

 N. L. Brilton, F. S. Earle, & Percy Wilson 5837 (herb. N. Y. Bot. Gard.). 



24. Exostema barbatum Standley, sp. now 



Shrub or small tree, 2-4.5 meters high, the branches stout, grayish, the branchlets densely 

 and minutely pilose, the internodes short; stipules broadly deltoid, 1-1.5 mm. long, obtuse or 

 acutish, puberulent; petioles very stout, 1-2 mm. long, minutely pilose; leaf-blades oval, 

 rounded-oval, or oval-elliptic, 1.3-2.2 cm. long, 0.7-1.5 cm. wide, rounded or obtuse at the 

 base, rounded or very obtuse at the apex, thick-coriaceous, deep-green above, lustrous, glabrous, 

 the costa subimpressed, the lateral veins obsolete, slightly paler beneath, villous-barbate 

 along the prominent costa, the lateral veins prominulous or plane, 3 or 4 on each side, the 

 margin more or less revolute; inflorescence terminal, cymose-corymbose, few- or many-flowered, 

 1.7-3.5 cm. broad, sessile or short-pedunculate, the pedicels stout, 1-3 mm. long, short-pilose; 

 calyx-lobes 5, linear-subulate, 1 mm. long; capsule obovoid or globose-obovoid, 3-3.5 mm. 

 long, reddish-brown, often lustrous, sparsely or densely short-pilose; seeds brown, 1.5 mm. 

 long, broadly winged. 



Tvpe collected on pine hills, Baracoa, Oriente, Cuba, March, 1903, L. M. Underwood c° F. 

 S. Earle 1360 (herb. N. Y. Bot. Gard.). 

 Distribution: Oriente, Cuba. 



25. Exostema mexicanum A. Gray, Proe. Am. Acad. 5: ISO. 



1861. 



Small tree, the branches slender, gray, conspicuously lenticellate, glabrous or obscurely 

 puberulent, the internodes elongate; stipules 2.5-4 mm. long, triangular, acuminate or long- 

 cuspidate; petioles 2-5 mm. long, glabrous or obscurely puberulent; leaf-blades ovate-oval, 

 ovate, or oval, 4.5-15 cm. long, 1.5-7.5 cm. wide, very obtuse or broadly rounded at the base, 

 abruptly acuminate or attenuate at the apex, membranaceous, bright-green, glabrous except 

 for tufts of short white hairs in the axils of the chief veins, the venation conspicuous, the 

 lateral veins 6-8 on each side, arcuate-ascending, the margin plane; inflorescence terminal, 

 cymose-corymbose, 7-10 cm. broad, densely many-flowered, the pedicels slender, 2-4 mm. long, 

 minutely puberulent; hypanthium 2.5-3 mm. long, ellipsoid, sparsely and minutely puberulent; 

 calyx-lobes 5, minute, deltoid, acute; corolla sparsely villosulous outside, the tube 8-10 mm. 

 long, the 5 lobes oblanceolate-linear, obtuse, about 1 cm. long, ascending or spreading; stamens 

 exserted, the anthers j-ellow, 3.5-4 mm. long. 



Type locality: Vicinity of Wartenberg, near Tantoyuca, Veracruz. 

 Distribution: San Luis Potost and Veracruz. 



