247] FLORA OF BOULDER, COLORADO 99 



113. SALIX L. Willow. 



294. S. amygdaloides Anders. Peacti willow. 

 Common along streams; the only willow, except the next, 



of tree size about Boulder, 5100-7000 ft. (Daniels, 90). 



Quebec to Washington; New York to Missouri and 

 Arizona. 



295. S. caudata (Nutt.) Piper [S. Fendleriana Anders. ; 5". 

 pentandra caudata Nutt.; 5. lasia?jdra. Fendleriana Bebb]. 

 Fendler's willow. 



Along streams in mountain canons, 5500 (Boulder creek)- 

 lOOOO ft. (Daniels, 807). 



Alberta to British Columbia; New Mexico to Cali- 

 fornia. 



296. S. exigua Nutt. Narrowleaf willow. 



Marshall; Valmonl; Boulder; South Boulder Canon; near 

 junction of Fourmile and Boulder creeks, 5000-9000 ft. 

 (Ramaley). 



Mackenzie to Washington; Colorado to California. 



297. S. luteosericea Rydb. Silky sandbar willow. 

 Sandy stream flats in the plains and mesas, 5100-7000 ft. 



(Daniels, 134). 



Nebraska to Idaho and Colorado. 



2975^. S. lutea Nutt. Yellow wiliow. 



Redrock lake, loioo ft. (Ramaley and Robbins). 

 Canada to Colorado and Califor.ma. 



298. S. Wolfii Bebb. Wolf's willow. 

 Eldora to Baltimore, 8000-10000 ft. (Rydberg). 

 Wyoming to Colorado. 



299. S. irrorata Anders. Bloom-branciied willow. 

 Gregory Caiion (E. Bethel). 



Colorado to New Mexico. 



300. S. perrostrata Rydb. Long-beaked willow. 

 Common in mountain cafions, 5500-8600 ft. (Daniels, 811). 

 Hudson Bay to Alaska and Colorado. 



