160 CONTEIBUTIONS FROM THE NATIONAL HEEBAEIUM. 



New Mexico: Farmington; Tierra Amarilla; Tunitcha Mountains; Santa Fe; Pecos; 

 Magdalena; Gila; Kingston; near Carlisle; White Mountains; Organ Mountains; 

 Mesilla Valley. Common along streams, from the Lower Sonoran to the Transition 

 Zone. 



Salix thurberi Rowlee is a form with longer leaves that are noticeably dentate. In 

 our opinion it is not essentially different from S. exigua as defined above. 



This is the common shrubby willow which grows in sandy soil, on ditch banks, and 

 to some extent beside streams, in the mountains at the lower levels throughout the 

 State. It is exceedingly variable in the size of the leaves and the degree of pub- 

 escence of the whole plant. The leaves are always narrowly linear and acute. The 

 Indians and Mexicans use the stripped branches in basketry. 



12. Salix taxifolia H. B. K. Nov. Gen. & Sp. 2: 22. 1817. 



Type locality: "ColiturinhortisMexicani, Queretari, Zelayae, alt. 900-1200 hex." 



Range: Arizona and New Mexico to Mexico. 



New Mexico: Deer Creek (Goldman 1441). 



Closely related to S. exigua, but with shorter leaves and very pubescent capsules. 

 It is known to us only from a single specimen from the extreme southwestern corner 

 of the State. 



13. SaUx fendleriana Anderss. Ofv. Svensk. Vet. Akad. Forh. 15: 115. 1858. 

 Type locality: "Hab. in Mexico nova." Type collected by Fendler, probably 



about Santa Fe (no. 816). 



Range: Northern New Mexico, northward and westward to the Pacific Coast. 



New Mexico: Nutritas Creek below Tierra Amarilla [Eggleston 6634, 6637). 

 Transition Zone. 



The species seems to be much more abundant farther north. 



14. Salix lasiandra Benth. PI. Hartw. 335. 1849. Western black willow. 

 Type locality: "Ad flumen Sacramento, " California. 



Range: Western and northern New Mexico to California, and northward. 



New Mexico: Chama; Santa Fe Canyon; north of Ramah; Mogollon Mountains. 

 Transition Zone. 



This is one of the two shrubby willows found along the borders of mountain streams 

 at middle elevations. The stems are brown and shining; the leaves are somewhat 

 coriaceous, resembling a cottonwood leaf, almost perfectly lanceolate, acuminate, 

 finely serrate, shining dark green above and pale or somewhat glaucous beneath, 8 to 

 12 cm. long. It is sometimes associated with S. irrorata, but our material shows it 

 only from the western and northern parts of the State. 



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



Type locality: "Hab. in Nova Mexico." The type is Wright's 1877 and did 

 not come from New Mexico but from the banks of the Rio Grande, in Texas or Chihua- 

 hua, or from Lake Santa Maria, Chihuahua. 



Range: From New Mexico southward into western Texas and Chihuahua, west- 

 ward to Arizona and Sonora. 



New Mexico: Cross L Ranch; Albuquerque; Socorro; Kingston; Mangas Springs; 

 Mesilla Valley; Roswell. Lower and Upper Sonoran zones. 



The species is the common narrow-leaved willow tree of New Mexico. It occurs 

 mostly along water courses (or near acequias or flooded bottoms) at the lower levels. 

 The mature leaves are light green, of about the same color on both surfaces, nan-owly 

 lanceolate, with numerous small teeth. Small, nan-owly oblong-lanceolate, acute 

 leaves appear with the flowers. The trunk is sometimes 20 cm. in diameter and is 

 covered with rough gray bark. The branches are slender, greenish yellow, and not 

 reflexed, even on old trees. 



