STANDLEY TREES AND SHRUBS OF MEXICO. 845 



5. Casearia guianensis (Aubl.) Urban, Symb. Antill. 3: 322. 1902. 

 Iroucana guianensis Aubl. PI. Guian. 1 : 329. pi. 127. 1775. 

 Casearia ramiflora Vahl, Symb. Bot. 2: 50. 1791. 



Veracruz. West Indies, Panama, and South America. 



Shrub or tree, 2 to 10 meters high ; leaves broadly obovate or oblong-obovate, 

 6 to 10 cm. long, 3 to 5 cm. wide, obtuse, shallowly and remotely crenate-serrate, 

 thick, in age nearly glabrous ; flowers 10 or fewer in each fascicle, the pedicels 

 3 to 6 mm. long ; sepals about 4 mm. long ; stamens usually 8 ; stigma entire ; 

 capsule 6 to 12 mm. long. " Cafeillo," " cafetillo," " palo bianco " (Porto Rico). 



6. Casearia obovata Schlecht. liinnaea 13: 434. 1839. 

 Casearia dentata DC. Prodr. 2: 51. 1825. 



Sinaloa, Tepic, and Veracruz ; type from Hacienda de la Orduiia, Veracruz. 



Shrub or small tree ; leaves short-petiolate, obovate-elliptic, 5 to 9.5 cm. long, 

 obtuse or abruptly short-pointed, sinuate-serrulate, coriaceous, densely pilosu- 

 lous beneath, pilosulous above along the nerves ; fascicles few or many-flowered ; 

 calyx 3 mm. long ; stamens usually 8 ; stigma entire ; fruit globose, 8 mm. in 

 diameter. 



Closely related to C. guianensis and perhaps not distinct. Another closely 

 related species is C. aculeata Jacq. (C spinosa Willd. ; C. hirta Swartz), which 

 has been reported from southern Mexico. It is a thorny shrub, of which the 

 writer has seen no Mexican specimens. 



7. Casearia laevis Standi., sp. nov. 



Sinaloa to Oaxaca ; type from Mazatl^n, Sinaloa {Rose, Standley d Russell 

 14154; U. S. Nat. Herb. no. 637012). Guatemala. 



Shrub or small tree, 2 to 4 meters high ; leaves short-petiolate, mostly elliptic 

 or obovate-elliptic, usually broadest above the middle, 4 to 6.5 cm. long, 2 to 

 3.5 cm. wide, obtuse or rounded at apex, rarely acute, rounded or obtuse at base 

 and very unequal, crenate-serrulate, thin, densely punctate, sparsely barbate 

 beneath along the costa, otherwise glabrous ; infloresence corymbose, few-flow- 

 ered, slender-pedunculate, the flowers on slender glabrous pedicels ; sepals 4 mm. 

 long, oblong-obovate, obtuse, the outer ones glabrous and ciliate, the inner ones 

 very minutely tomentulose ; stamens usually 8, the filaments sparsely pubescent 

 or glabrous ; disk appendages ligulate, half as long as the filaments, placed 

 between the stamens, hairy ; stigma entire ; fruit globose-obovoid, 12 mm. long, 

 glabrous; seeds usually 2. "Palo de piedra corteno " (Oaxaca). 



Besides the type, the following collections are to be referred here : Nelson 

 4308, Langlass6 949, Rose 1418, and Palmer 417, from Mexico ; J. D. Smith 2818 

 and 2007, from Guatemala. 



8. Casearia nitida (L.) Jacq. Enum. PI. Carib. 21. 1760. 

 Samyda nitida L. Syst. Nat. ed. 10. 1025. 1759. 

 Casearia corymbosa H. B. K. Nov. Gen. & Sp. 5: 366. 1821. 

 ? Casearia duhia DC. Prodr. 2: 51. 1825. 



Tepic to Tamaulipas, Veracruz, Yucatan, and Oaxaca. West Indies, Central 

 America, and northern South America ; type from Cartagena, Colombia. 



Shrub or small tree, 1 to 4.5 meters high or larger, with whitish branches ; 

 leaves short-petiolate, 4 to 7.5 cm. long, acute or short-acuminate, rarely 

 obtuse, rounded to acute at base, serrulate or subentire, thin, densely punctate, 

 barbate beneath along the costa but otherwise glabrous at maturity, when 

 young often pilosulous beneath ; corymbs few or many-flowered, the flowers 

 on short or elongate pedicels, greenish white ; sepals 3 to 4 mm. long, stamens 

 usually 8 ; stigma entire ; fruit obovoid or ellipsoid, 8 mm. long or larger. 

 "Cafetillo" (Veracruz, Tabasco); "vara blanca " (Guatemala, Honduras); 

 " cerillo " (Costa Rica); " comida de culebra," " cerillos " (Nicaragua). 



