122 NORTH AMERICAN FLORA [Volume 32 



veins, the eosta prominent, the lateral veins slender, prominulous, about 6 on each side, the 

 margin plane; inflorescence terminal, corymbose, many-flowered, the pedicels 4—6 mm. long, 

 longer than the hypanthium; hypanthium obovoid, 3-4 mm. long; calyx-lobes 5, triangular- 

 acuminate, about 1 mm. long; corolla-tube 1.5 cm. long, the lobes slightly longer. 



Type locality: Jamaica. 

 Distribution: Jamaica. 



13. Exostema rupicola Urban, Symb. Ant. 7: 399. 1912. 



Shrub, the branches blackish, rimose, glabrous or minutely pilosulous when young; 



stipules triangular-lanceolate, acuminate, 2.5 mm. long, persistent; petioles 3-6 mm. long; 



leaf-blades elliptic-oblong or lanceolate, 3-4.5 cm. long, 1.2-1.6 cm. wide, acute at the base, 



narrowed to the short-acuminate apex, subcoriaceous, glabrous, green above, sublustrous or 



dull, the venation impressed, paler beneath, the venation prominent, the margin subrevolute; 



inflorescence terminal, corymbose, few-flowered, the pedicels 5-10 mm. long; hypanthium 



glabrous, 2.5-3 mm. long, oblong; calyx-lobes filiform, 2.5-3 mm. long, ciliolate; corolla white, 



glabrous, 2 cm. long or more in bud. 



Type locality: Along streams near Bahoruco, Province of Barahona, Santo Domingo, at an 

 altitude of 70 meters. 



Distribution: Known only from the type locality. 



14. Exostema brachycarpum (Sw.) R. & S. Syst. Veg. 5: 19. 



1819. 



Cinchona brachycarpa Sw. Prodr. 41. 1788. 



Tree, sometimes 12 meters high, glabrous throughout, the branches stout, grayish, the 

 internodes short or elongate; stipules ovate-deltoid, 8-10 mm. long, obtuse or acutish; petioles 

 stout, 0.5-1.2 cm. long; leaf-blades oval, ovate-oval, or oblong, 7-15 cm. long, 3.5-8 cm. 

 wide, rounded or obtuse at the base, obtuse or acute at the apex, sometimes broadly short- 

 acuminate, the venation plane above, prominent beneath; inflorescence terminal, cymose- 

 corymbose, few- or many-flowered, the pedicels stout, longer than the calyx; hypanthium 4-5 

 mm. long; calyx-lobes 5, minute, deltoid, acute; corolla pale-red, glabrous, the tube slender, 

 2.5-5 cm. long, the 5 lobes linear, half as long as the tube; anthers 10-12 mm. long; capsule 

 oval, 1.5 cm. long, coarsely 10-costate. 



Type locality: Jamaica. 

 Distribution: Mountains of Jamaica. 

 Illustration: Lamb. Descr. Cinchona pi. 8. 



15. Exostema floribundum (Sw.) R. & S. Syst. Veg. 5: 19. 1819. 



Cinchona floribunda Sw. Prodr. 41. 1788. 



Cinchona montana Badier, Obs. Phys. 34: 129. 1789. 



Cinchona luciana Vitm. Summa PI. Suppl. 1: 264. 1802. 



Tree, the branchlets stout, brownish, glabrous, the internodes short; stipules sheathing, 

 9 mm. long or shorter, thin, brown, the lobes obtuse or acute; petioles stout, 5-12 mm. long, 

 glabrous; leaf-blades elliptic, elliptic-oblong, oval, or oval-oblong, 11-22 cm. long, 4.5-11.5 cm. 

 wide, obtuse or acutish at the base, abruptly short-acuminate at the apex, with an obtuse 

 acumen, chartaceous, bright-green, lustrous above, glabrous, the venation impressed, glabrous 

 beneath or pilose in the axils of the lateral veins, these prominent, 7-12 on each side, arcuate, 

 the margin usually plane; inflorescence terminal, cymose-corymbose, 7-15 cm. broad, many- 

 flowered, the pedicels stout, 3-12 mm. long; hypanthium ellipsoid, 6-7 mm. long, glabrous; 

 calyx-lobes 5, triangular-subulate, 1-2 mm. long; corolla pale-red, the tube 2-3 cm. long, 1.5 

 mm. thick, the 5 lobes linear, obtuse, about as long as the tube; stamens exserted, the anthers 

 10-12 mm. long; capsule cylindric, 1.2-2 cm. long, dark-brown, obscurely costate. 



Type locality: St. Lucia. 



DISTRIBUTION: Lesser Antilles; perhaps also in Hispaniola. 



Illustrations: Obs. Phys. 34: pi. 1; Lamb. Descr. Cinchona pi. 7; Phil. Trans. Roy. Soc. 

 London 74: pi. 19. 



