STANDLEY TKEES AND SHEUBS OF MEXICO 1389 



3. Psychotria pinularis Sesse & Moc. Fl. Mex. ed. 2. 57. 1894. 



Sinaloa to Guerrero. West Indies and South America; type from Porto Rico. 



Shrub, nearly glabrous; leaves mostly obovate, 4 to 7 cm. long, obtuse to short- 

 acuminate, attenuate to the base, thin, glabrous except for tufts of hairs beneath 

 in the axils of the lateral nerves; cymes few-flowered, the flowers pedicellate, 

 white. "Crucecilla" (Sinaloa). 



4. Psychotria horizontalis Swartz, Prodr. Veg. Ind. Occ. 44. 1788. 

 Sinaloa to Chiapas. Greater Antilles; Central America and northern South 



America. 



Shrub, 4 meters high or less; leaves short-petiolate, narrowly or broadly elliptic, 



5 to 12 cm. long, long or short-acuminate, acute or obtuse at base, rufous- 

 villous beneath along the costa or glabrous; cymes slender-pedunculate, usually 

 many-flowered; fruit red. 



5. Psychotria undata Jacq. PL Hort. Schonbr. 3: 5. pi. 260. 1798. 

 Psychotria rufescens H. B. K. Nov. Gen. & Sp. 3: 364. 1818. 

 Veracruz; Oaxaca (?). Florida; West Indies; Central America. 



Shrub, 1 to 3 meters high; stipules thin, brown, deciduous; leaves elliptic- 

 oblong to elliptic, 15 cm. long or less, acuminate, pubescent or glabrate; inflor- 

 escence fulvous-villous; corolla white; fruit 5 to 6 mm. long, red, glabrous or 

 pubescent. "Huesito" (Panama). 



Psychotria sessilifolia Mart. & Gal.,' described from Veracruz, is perhaps to be 

 referred here. 



6. Psychotria pulverulenta Urban, Symb. Antill. 7: 456. 1913. 



Reported from Mexico (San Luis Potosi ?) by Urban. Florida; Greater 

 Antilles; Cuba. 



Leaves lanceolate or elliptic-lanceolate, 7 to 15 cm. long, acuminate, pilosuloua 

 or puberulent beneath; cj'mes often borne in the forks of the branches; corolla 



3 mm. long, glabrous; fruit 10-costate, 3.5 to 4 mm. long. 



7. Psychotria erythrocarpa Schlecht. Linnaea 9: 595. 1834. 



Tamaulipas and San Luis Potosi to Chiapas; type from Hacienda de la Laguna, 

 Veracruz. 



Shrub, the branchlets densely pubescent; leaves short-petiolate, mostly 

 obovate or oblong-obovate, 4 to 9 cm. long, obtuse to short-acuminate, obtuse 

 to attenuate at base, densely pubescent beneath; cymes short and small, usually 

 2 to 3 cm. wide; corolla pubescent; fruit red, pubescent. 



Closely related and perhaps not specifically different is Mapouria chamissoana 

 Loesener (Verh. Bot. Ver. Brand. 56: 112. 1923). 



8. Psychotria pubescens Swartz, Prodr. Veg. Ind. Occ. 44. 1788. 

 Guerrero to Veracruz. West Indies and Central America. 



Shrub, 1 to 3 meters high; leaves short-petiolate, oblanceolate to elliptic, 



6 to 14 cm. long, acuminate, acute at base, thin, finely puberulent beneath; 

 inflorescence corymbose, loosely many-flowered, pubescent; corolla white, about 



4 mm. long; fruit red. 



9. Psychotria hebeclada DC. Prodr. 4: 513. 1830. 



Veracruz and Oaxaca and perhaps elsewhere. Central America and Panama. 



Shrub, 1 to 1.5 meters high, the branches densely pubescent; leaves short- 

 petiolate, lance-oblong to elliptic, 7 to 18 cm. long, acuminate, acute to attenuate 

 at base, thin; inflorescence corymbose, the flowers white or pinkish; fruit 3.5 mm. 

 broad. "Huesito" (Panama). 



1 BuU. Acad. Brux. 11': 228. 1844. 



