60 NORTH AMERICAN FLORA [Volume 25 



Leaves acute ; pedicels much thickened at the apex. 16. E. incrassalum. 

 Leaves very inconspicuously veined ; petioles 6-12 

 mm. long. 17. B. longipes. 



Leaves green beneath. 



Fruit pointed at the apex. 18. E. oxycarpum. 



Fruit blunt at the apex. 



Fruit short-oblong, about 1.5 times as long as thick. 19. E. havanense. 

 Fruit oblong, 2-3 times as long as thick. 



Leaves inconspicuously reticulate-veined ; stip- 

 ules lanceolate. 20. E. obovatum. 

 Leaves conspicuously reticulate-veined ; stipules 

 ovate. 

 Leaves thin ; pedicels nearly filiform, 5-12 



mm. long. 21. E. ovatum. 



Leaves subcoriaceous ; pedicels 4-6 mm. long. 22. E. mexicanum. 

 Stipules large, strongly striate. 



Fascicles 10-15-flowered ; pedicels 2-3 mm. long. 



Leaves cuneate at the base, 10 cm. long or less ; calyx- 

 lobes mucronate. 23. E. costaricense . 

 Leaves narrowed or rounded at the base, 12 cm. long or 

 more; calyx-lobes acute. 24. E. amplum. 

 Fascicles 2-10 flowered ; pedicels 4-9 mm. long. 



Calyx-lobes ovate or ovate-lanceolate, acute or acuminate. 

 Flowering calyx 2 mm. long ; leaves abruptly short- 

 acuminate. 25. E. labascense. 

 Flowering eabyx 3-4 mm. long ; leaves gradually acute 

 or acuminate. 26. E. macrophvllum. 

 Calyx-lobes orbicular-ovate, sharply acuminate. 27. E. lucidum. 

 Stipules bifid. 28. E. popayanense. 



1. Erythroxylon minutifolium Griseb. Cat. PI. Cuba 41. 1866. 

 A shrub with stiff curved branches and numerous short spur-like branchlets, densely 

 leafy. Leaves orbicular, rigid, 6 mm. long or less, refuse at the apex, obtuse or subcord- 

 ate at the base, bright-green and shining above, dull-green beneath, rather prominently 

 few-veined, the petioles less than 0.8 mm. long, the short ovate stipules mostly imbri- 

 cated ; pedicels solitary in the axils, about one half as long as the leaves ; calyx cleft to 

 about the middle, its lobes triangular-ovate ; petals about 2 mm. long, oblong ; drupes ob- 

 long, obtuse at both ends, 5 mm. long. 



Type locality : Western Cuba. 

 Distribution : Cuba ; Haiti. 



2. Erythroxylon squamatum Sw. Prodr. 75. 1788. 



A tree or large shrub. Leaves elliptic to obovate-elliptic, rather firm in texture, 5-14 

 cm. long, 6 cm. wide or less, abruptly acuminate at the apex, narrowed at the base, the 

 midvein prominent, the lateral veins diverging from it at a very wide angle ; petioles 4-7 

 mm. long ; stipules ovate, acute, 2-4 mm. long, persistent on the twigs ; pedicels clustered in 

 the axils, slender, angled, longer than the petiole, in fruit 1.3-2 cm. long; calyx cleft to 

 about the middle, 1.5 mm. long, its lobes ovate, abruptly acute ; petals oblong, obtuse, 

 3.5-5 mm. long, the ligule about one third as long as the blade ; drupes narrowly oblong, 

 obtusely angled, blunt-pointed, 1.5-2 cm. long, about 8 mm. thick. 



Type locality : West Indies. 



DISTRIBUTION: Montserrat and Guadeloupe to Grenada, Trinidad, and Guiana; reported 

 from Cuba. 



Illustration : Vahl, Syrub. 3 : pi. 63. 



3. Erythroxylon alaternifolium A. Rich, in Sagra, 



Hist. Cuba 10 : 105. 1845. 

 A shrub, 4.5 m. high or less, much branched. Leaves obovate to obovate-oblong, firm 

 or coriaceous in texture, emarginate or obtuse at the apex, narrowed, subcuneate or some 

 of them rounded at the base, 2-6 cm. long, strongly reticulate-veined, bright-green and 

 shining above, yellow-green to brown-green beneath ; petioles 2.5-5 mm. long ; stipules 

 broadly ovate, acute, 1.5-2 mm. long; flowers solitary in the axils on pedicels not longer 

 than the petioles ; calyx 1 mm. long, cleft to a little beyond the middle, its lobes abruptly 



