STANDLEY TREES AND SHRUBS OF MEXICO. 549 



The bark is used for tanning and dyeing, and has been exported for that 

 purpose from Baja California. The Indians of Sonora are said to use the 

 branches for basketry. An infusion of the bark or gum is a popular remedy 

 for venereal diseases. 



It may be that more than one species should be recognized here, but tlie 

 characters that have been cited as distinguishing the three species here com- 

 bined do not hold for the material examined by the writer. 



20. Elaphrium galeottianum (Engl.) Rose, N. Amer. Fl. 25: 2-19. 1911. 

 Bursera galeottiana Engl, in DC. iMonogr. Phan. 4: 47. 1883. 



Puebla and Oaxaca ; type from Tehuacan, Puebla. 



Small tree; leaflets 13 to 25, glabrous. " Cuajiote Colorado" (Oaxaca, 

 Villada). 



Very closely related to E. microphyUum, and perhaps only a form of it. 

 The leaflets, however, are narrower, and the pubescence usually more abundant. 



21. Elaphrium odoratum (T. S. Brandeg.) Rose, N. Amer. Fl. 25: 250. 1911. 

 Bursera odorata T. S. Brandeg. Proc. Calif. Acad. II. 2: 138. 1889. 



Bursera teniiifolia Rose, Contr. U. S. Nat. Herb. 3: 314. 1895. 



Bursera aptera Ramirez, Anal. Inst. Med. Nac. Mex. 2: 16. 1896. 



Bursera purpusii T. S. Brandeg. Zoe 5: 249. 1908. 



Elaphrium covillci Rose, N. Amer. Fl. 25 : 250. 1911. 



Elaphrium confusum Rose, N. Amer. Fl. 25: 251. 1911. 



Elaphrium hrachypodum Rose, N. Amer. Fl. 25: 253. 1911. 



Sonora and Baja California to Morelos and Puebla ; type from San Gregorlo, 

 Baja California. 



Shrub or small tree; bark yellow, peeling off in thin papery sheets; leaflets 

 5 to 11, 1 to 3.5 cm. long, acute to rounded at apex, entire or obscurely crenu- 

 late, usually glabrous but sometimes sparsely pubescent beneath. " Cuajiote 

 verde " (Morelos); " torote " (Baja California, Sinaloa) ; " chutama " (Sina- 

 loa). 



The gum is applied to cure scorpion stings, insect bites, and other wounds. 

 It is yellowisli, brown, or almost black, odorless, acrid, and bitter, and is 

 reputed to have expectorant and drastic purgative properties. It is used also 

 for mending broken dishes. The bark is employed for tanning hides. 



The species is a variable one, the leaves varying greatly upon the same 

 plant. All the names listed above refer to very closely related forms, which 

 it seems impossible to separate by any constant character. For an illustration 

 of a tree see Contr. U. S. Nat. Herb. 16: pi. 115. 



This is probably the species figured by Hernandez and described ' in a 

 chapter entitled " De Cuitlacopalli seu Stercore Copallis, Copallifera VI." 



22. Elaphrium pringlei (S. Wats.) Rose, N. Amer. Fl. 25: 252. 1911. 

 Bursera pringlei S. Wats. Proc. Amer. Acad. 25: 145. 1890. 



Jalisco ; type from bluffs of the Rio Grande de Santiago, near Guadalajara. 

 Small tree ; leaflets linear-lanceolate, 2 to 4 cm. long, dark green above, 

 pale beneath ; flowers purplish. " Cuajiote Colorado." 



23. Elaphrium penicillatum DC. Prodr. 1: 724. 1824. 



Bursera grareolens pilosa Engl, in DC. Monogr. Phan. 4: 49. 1883. 



Bursera penicillata Engl, in DC. Monogr. Phan. 4: 52. 1883. 



Elaphrium pilosum Rose, N. Amer. Fl. 25: 251. 1911. 



Southern Chihuahua and Sinaloa to .Taliscn. 



Shrub, 1 to 3 meters high ; leaflets 7 to lo, thin, 4 to 8 cm. long. 



' Thesaurus 48. 1651. 



