120 NORTH AMERICAN FLORA [Volume 32 



6. Exostema acuminatum Urban, Symb. Ant. 3: 378. 1903. 



Exostema salicifolium Griseb. Cat. PI. Cub. 125, in part. 1866. 



Shrub or tree, sometimes 7 meters high, glabrous throughout, the branches yellowish or 



gray, rimose and lenticellate ; stipules 1-2.5 mm. long, broadly triangular, filiform-acuminate; 



petioles 2-3 mm. long; leaf-blades lanceolate or ovate-lanceolate, 4-6 cm. long, 1-2.2 cm. wide, 



rounded at the base, gradually attenuate to the acute apex, chartaceous, lustrous above, the 



costa prominent above, the lateral veins prominulous, arcuate, nearly obsolete beneath, the 



margin subrevolute; pedicels axillary, mostly 1-flowered, 1-1.5 cm. long; hypanthium 5 mm. 



long, oblong or elliptic-oblong; calyx-lobes 5, minute, triangular; corolla white, 6-7 cm. long, 



the tube 2-2.5 cm. long, 1.5 mm. thick, the 5 lobes linear, twice as long as the tube or longer; 



stamens exserted, the anthers 1.2-1.5 cm. long; capsule elliptic-oblong, 1.8 cm. long, 6 mm. 



thick, brownish-black, lustrous. 



Type locality: Near Gona'ives, Haiti. 

 Distribution: In forests, Hispaniola. 



7. Exostema purpureum Griseb. Cat. PI. Cub. 125. 1866. 



Shrub, 2-15 dm. high, glabrous throughout, the branches stout, gray or brownish, the 

 internodes elongate; stipules 1-1.5 mm. long, subcuspidate, thick; petioles stout, 2.5-7 mm. 

 long; leaf-blades lance-oblong, ovate-oblong, ovate, or elliptic-oblong, 3.5-6.5 cm. long, 1.5- 

 2.5 cm. wide, rounded or obtuse at the base, acute or subacuminate at the apex, with a broad 

 obtuse acumen, thick-coriaceous, lustrous, bright-green above, paler beneath, the costa im- 

 pressed above, stout and prominent beneath, the lateral veins usually obscure or obsolete, 

 4-6 on each side, distant, divergent, the margin often revolute; pedicels mostly axillary, 

 solitary or geminate, very slender, 0.5-2 cm. long; hypanthium ellipsoid, 4-5 mm. long; calyx- 

 lobes 5, minute, triangular, acute; corolla purple outside, rose within, the tube about 1.5 cm. 

 long, the lobes of equal length; capsule ellipsoid, about 1.5 cm. long, smooth, the valves after 

 dehiscence 8 mm. broad. 



Type locality: Near Baracoa, Cuba. 



Distribution: Arroyos and dry thickets, Oriente, Cuba. 



8. Exostema caribaeum (Jacq.) R. & S. Syst. Veg. 5: 19. IS 19. 



Cinchona caribaea Jacq. Enum. PI. Carib. 16. 1760. 



Cinchona jamaicensis Wright, Phil. Trans. Roy. Soc. London 67: 506. 1778. 



Cinchona myrtijolia Stokes, Bot. Mat. Med. 1: 359. 1812. 



Cinchona racemosa Schrank; Steud. Nom. Bot. ed. 2. 1: 363. 1840. 



Exostema longicuspe Oerst. Vidensk. Meddel. 1852: 48. 1852. 



Shrub or tree, sometimes 8 meters high, the branchlets stout, grayish or brownish, rimose, 



glabrous, densely leafy; stipules 2.5-5 mm. long, the lobes rounded or acute, long-cuspidate, 



thick, ciliolate; petioles slender, 3-12 mm. long, glabrous or short-pilose; leaf -blades mostly 



ovate, sometimes broadly ovate, ovate-oval, ovate-oblong, or elliptic-oblong, 5-11 cm. long, 



1.3-5 cm. wide, obtuse or acute at the base, often abruptly short-decurrent, usually rather 



abruptly acuminate at the apex, sometimes acute or attenuate, membranaceous, yellowish - 



green, glabrous above, usually glabrous beneath except for tufts of hairs in the axils of the 



veins, or sometimes quite glabrous, rarely densely white-pilose with short hairs, the venation 



usually impressed above and prominent beneath, the lateral veins few, arcuate-ascending, the 



margin plane; flowers axillary, solitary, the pedicels stout, 4-10 mm. long; hypanthium 



glabrous, 4-5 mm. long; calyx-lobes 5, 1 mm. long or shorter, broad, obtuse or acutish; 



corolla white, glabrous, the tube 3-5 cm. long, 2 mm. thick, often curved, the 5 lobes linear, 



recurved, about equaling the tube; stamens long-exserted, the anthers linear, about 2 cm. 



long; capsule oval or ellipsoid, 1-1.5 cm. long, smooth, dark-brown, lustrous; seeds oval, 



3-6 mm. long, black, with a narrow brownish wing. 



Type LOCALITY: [Thickets near Havana, Cuba]. 



DISTRIBUTION: Florida Keys; San Luis Potosi to Colima and Costa Rica; general in the West 

 Indies. 



Illustrations: Phil. Trans. Roy. Soc. London 67: pi. 10; Jacq. Sel. Stirp. Am. pi. 179, f. 95; 

 Britton, N. Am. Trees f. 765; Lamb. Descr. Cinchona pi. 4; Andr. Bot. Repos. pi. 481; Gaertn. Fruct. 

 pi. 33; Sarg. Silva pi. '226; Sarg. Man./. 635. 



