518 COIS^TKIBUTIO^S^S FROM THE NATIONAL HEEBARIUM. 



Slender shrub, sometimes 2 meters high, witli reddish brown branches; 

 leaflets mostly 2 to 4 cm. long, pubescent; sepals 3 to 4 mm. long, the petals 

 twice as long ; capsule 5 to 7 mm. long. 



4. Oxalis yucatanensis (Rose) Standi. 

 Lotoxalis occide^italis Rose, Coutr. U. S. Nat. Herb. 10: 115. 1906. Not 



Oxalis occidentalis Knuth, 1915. 



Lotoxalis yucatanensis Rose, Contr. U. S. Nat. Herb. 10: 116. 1906. 



Sinaloa to Guerrero and Yucatan ; type from YucatS^n. Central America. 



Slender shrub, rarely more than 30 cm. high ; leaflets 1 to 2.5 cm. long, 

 glabrous or sparsely pubescent beneath ; sepals 4 to 5 mm. long ; capsule 6 to 8 

 mm. long. 



5. Oxalis neaei DC. Prodr. 1 : 691. 1824. 

 OxuHs tephrodes Turcz. Bull. Soc. Nat. Moscou 31': 427. 1858. 

 Oxalis psilotrichia Turcz. Bull. Soc. Nat, Moscou 31': 427. 1858. 

 Oxalis fasciculaia Turcz. Bull. Soc. Nat. Moscou 32 ' : 272. 1859. 

 Lotoxalis neaei Rose, Contr. U. S. Nat. Herb. 10: 115. 1906. 

 Guerrero to Veracruz and Chiapas ; type from Acapulco, Guerrero. Central 



America and South America. 



Slender shrub, a meter high or less, or often herbaceous ; leaflets 1 to 3 cm. 

 long, pubescent on both sides ; sepals 3 to 4 mm. long ; capsule 4 to 6 mm. long. 



66. ERYTHROXYLACEAE. Coca Family. 



1. ERYTHROXYLON L. Syst. Nat. ed. 10. 1035. 1759. 



Reference : Britton, N. Amer. Fl. 25 : 59-66. 1907. 



Glabrous trees or shrubs; leaves alternate, entire, thin, stipulate, petiolate; 

 flowers small, solitary, or fasciculate in the leaf axils ; fruit a small drupe. 



Erythroxylon coca Lam., of South America, is the well-known coca plant, 

 from which cocaine is obtained. It is cultivated extensively in Peru and 

 Bolivia. 



Stipules large, conspicuously striate ; leaves acute. 



Calyx lobes ovate 1. E. tabascense. 



Calyx lobes orbicular-ovate 2. E. lucidum. 



Stpules small, not striate ; leaves rounded or very obtuse at apex. 

 Leaves large, usually 3.5 to 7 cm. long. 



Pedicels filiform, 5 to 12 mm. long 3. E. havanense. 



Pedicels stout, 4 to 6 mm. long 4. E. mexicanum. 



Leaves small, all or most of them less than 3 cm. long. 



Leaves broadly ovate 5. E. compactum. 



Leaves ovate to broadly oval, broadest at or below the middle. 



Branchlets glaucescent ; pedicels 5 to 7 mm. long 6. E. pringlei. 



Branchlets not glaucescent ; pedicels 2 to 4 ram. long 7. E. pallidum. 



1. Erythroxylon tabascense Britton, N. Amer. Fl. 25: 66. 1907. 



Wrythroxylon cllipticum Ramirez; Villada, Naturaleza 3: 53. pi. //. 1898. 

 Not E. ellipticum R. Br. 1863. ^ 



Tabasco, and probably in Veracruz ; type from San Sebastian, Tabasco. 



Shrub with brown branches; leaves 8 to 14 cm. long; petals 1 to 3.5 mm. 

 long. " Zapotillo " (Veracruz, Ramirez). 



The infusion of the leaves is said to be used as a beverage. 



