Ball — Notes on Some Western Willows. 75 



S. pentandra ^ caudata Nutt., Sylva 1 : 61. pi. IS. 1842. 



S. Fendleriana Anderss., Sal. Bor.-Ain. 54. (8). 1858. 



S. arguta Anderss. (excl. vars.) Monos;. Sal. 32. fig. 22. 18G7. — 

 Anderss. in DC. Prod. 16': 205. 1868. 



*S'. lasiandra var. Fendleriana Bebb in Bot. Calif. 2 : 84. 1880. — Bebb in 

 Coult., Man. Rocky Mt. Bot. 334. 1885. —Nelson, Prel. Fl. Wyo. 179. 1896. 



The rather characteristic foliage of this variety is well 

 shown in Nuttall's figure and his name caudata is aptly de- 

 scriptive of the long and slenderly acuminate apex of the ma- 

 ture leaf, to which he calls attention. The figure in Sargent's 

 Silva is also very accurate as regards both foliage and aments. 

 The rather narrowly lanceolate leaves are from three to seven 

 inches long, slenderly caudate at the apex, rounded or sub- 

 acute at the base, thicker and more coriaceous than those of 

 S. lasiandra proper, remaining dark green below when 

 mature; stipules very small or wanting; petiolar glands not 

 large ; aments 1-2 inches long, dense, on shorter peduncles 

 than those of lasiandra; fertile scale usually broader, 

 oblanceolate. 



The variety ranges from New Mexico northward in the 

 Rocky Mts. to beyond our northern border, and westward 

 nearly to the coast. Its characters are most constant and 

 strongly marked in the Rockies ; toward the coast it is less 

 easily distinguished from typical S. lasiandra. The only 

 Rocky Mt. specimen in which I have observed serious devia- 

 tion from the varietal characters is Baker, Earle, and Tracy, 

 124, in which the half grown leaves are becoming distinctly 

 glaucous beneath. The aments are those of the variety, 

 however. 



Specimens examined. — Baker, Earle, and Tracy, 124, PI. So. Colo., 

 8. cordata, 1898. — Brandegee, Colo. Fl., var. Fendleriana, Canon Cy., 1877. — 

 Davis, 150, S. nigra, Lincoln Co., Nev., 1880. — Engelmann, Clear Creek 

 at Idaho Spr., Colo., Aug. 22, 1881; Salt Lake City, Utah, June 29, 1880. — 



Fendler, S16, PI. Nov.-Mex. ( ), 1847. — Hall, 471, PI. Oreg. ( ), 



1871. Heller, 2941, 3334, Idaho PI., 1896; 3637, N. Mex. PI., S. lasi- 

 andra, 1897. — Jones, 5171, West. Flora, S. desertorum (the ^f only); 

 5427, West. FL, var. Fendleriana, 1894. —Nelson, 737, Fl. Wyo., var. 

 Fendleriana, 1894; 3284, Fl. Wyo., 1897. — Pammel, 207, PI. Wyo., 1897. 



S. FLAVESCENS Nuttall. 



S. flavescens Nutt., Sylva 1 : 65. 1842. — Bebb in Bot. Calif. 2 : 86. 1880. — 

 Bebb in Coult., Man. Rocky Mt. Bot. 336. 1885. — Bebb, Bot. Gaz. 16: 105. 



