162 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Tree, sometimes 20 or even 40 meters high, with a trunk diameter of a meter, 

 but usually smaller; branches slender, spreading or somewhat drooping; bark 

 rough, blackish, coming off in narrow strips ; leaves 6 to 15 cm. long ; wood 

 light reddish brown, soft, weak, its specific gravity about 0.44. " Sauz " 

 (Tamaulipas). 



The bark is sometimes used in domestic medicine for its reputed tonic, febri- 

 fuge, anaphrodisiac, carminative, and stimulant properties. Palmer states 

 that in T;imaulipas a decoction of the bark is used as a lotion for erysipelas. 

 All the Mexican material is referred by Schneider to /S. nigra lindlieimerii, 

 which occurs also in western Texas. 



3. Salix gooddingii Ball, Bot. Gaz. 40: 376. 1905. 



Chihuahua to Baja California and Sinaloa. California to New Mexico ; type 

 from Clark County, Nevada. 



Shrub or tree, sometimes 12 meters high ; bark rough, dark ; leaves narrowly 

 lanceolate, 5 to 12 cm. long; capsules glabrous. " Sauz " (Chihuahua). 



Palmer reports that a decoction is used in Chihuahua for fevers. A form 

 which may represent a hybrid between this and S. bonplandiana is reported 

 from Baja California by Schneider. 



4. Salix wrightii* Anderss. Ofv. Svensk. Vet. Akad. Forh. 15: 115. 1858. 

 Northern Chihuahua. Western Texas and New Mexico. Type from Texas 



or Chihuahua. 



Shrub or small tree. 



5. Salix jaliscana Jones, Contr. West. Bot. 12: 77. 190S. 

 Jalisco, the type from Ferreria; Michoacan (?). 



Shrub or small tree ; leaves elliptic or elliptic-lanceolate. 



6. Salix bonplandiana H. B. K. Nov. Gen. & Sp. 2: 20. pi. 101, 102. 1817. 

 Salix pallida H. B. K. Nov. Gen. & Sp. 2: 20. 1817. 



Nearly throughout Mexico ; type from Hidalgo. Guatemala ; southern New 

 Mexico and Arizona. 



Small or large tree, sometimes 12 meters high or more, with a trunk 40 cm. 

 in diameter, the branches slender, somewhat drooping; bark brown, thick, 

 irregularly fissured ; leaves lanceolate or linear-lanceolate, 12 cm. long or 

 shorter, 1 to 2 cm. wide. "Sauz" (Jalisco, Baja California); "sauce" 

 (VrMna). 



7. Salix taxifolia H. B. K. Nov. Gen. & Sp. 2: 18. 1817. 

 Salix microphylla Schlecht. & Cham. Linnaea 6: 354. 1831. 



Nearly throughout Mexico ; type from Queretaro. Western Texas to Ari- 

 zona ; Guatemala; Porto Rico (?). 



Shrub or tree, sometimes 18 meters high, ^vith a trunk 50 cm. in diameter ; 

 leaves linear or lanceolate, 3 cm. long or shorter, silverj^-silky ; capsules pubes- 

 cent. "Taray," "taray de rio " (Durango, Fatoni) ; " tarais " (Chihuahua). 



8. Salix exigua Nutt. N. Amer. Sylv. 1 : 75. 1842. 



Chihuahua to Baja California. Northward to Canada ; type from Oregon. 

 Shrub, 2 to 4 meters high, or sometimes a tree 7 meters high. 



* Named for Charles Wright (1811-1885), one of the most famous of American 

 botanical collectors. From 1847 to 1851 he made very large collections in 

 western Texas, southern New Mexico and Arizona, and Chihuahua and Sonora. 

 These were studied by Gray, and many species of northeastern Mexico were 

 first described from Wright's collections. Later Wright obtained an extensive 

 series of plants in Cuba, and also in Nicaragua and other reglon.s. Sets of his 

 plants are in the U. S. National Herbarium, 



