SUPPLEMENT TO THE FLORA OF MONTANA. 47 



glabrous and scarcely impressed-reticulate above, sericeous 

 and veins prominent beneath, often nearly glabrate in age; peti- 

 oles 1-3 mm. long: aments 2-3 cm. long: capsules short avoid, 2-3 

 mm. long, sessile. A low, procumbent shrub, 3-9 dm. high in al- 

 pine and subalpine situations in the Rocky Mountains from Mon- 

 tana northward. 



Hitherto confused with .5\ z'cstita, Pursh, from which it differs in 

 its thinner, narrower, rounded or pointed leaves, which are less ret- 

 iculate above and less silky pubescent below ; its longer aments and 

 smaller capsules, as well as by its difference in range. 6". vcstita, 

 Pursh is separated from this by its thicker, broader, retuse leaves; 

 prominently impressed reticulate above and villous sericeous below, 

 its shorter aments and larger (4-6 mm. ), more acuminate capsules^ 

 while its range appears to be restricted mainly to Quebec and Lab- 

 rador. Xamed for M. L. Fern aid of the Gray Herbarium, who 

 first called attention to this Rocky Mountain species. 



Stanton Lake, 7500 ft., Aug. 7, 1894, R. S. Williams, No. 103! ; 

 Single-shot Mountain, Teton Co., 7000 ft., July 4, 1897, R. S. Wil- 

 liams and three other localities in the state quoted by Rydberg 

 (Fl. 112) under 6". vcstita. 



Salix flava, Rydberg, Bull. Torr. Bot. Club, 28: 273. Near 

 S. lutca, Nutt. "Boulder River, 1888, F. Tweedy, 63". 



SaJix iasiandra, Bcnth. (W. W. Rowlee). A small or 

 medium sized tree with rough grayish bark, but trunk very smooth 

 and straight when young. Mountain canyons mainly. 



Belgrade, May 31, 1901 ; Garrison, Sept. 4, 1899; Bridger Canyon, 

 May 15, 1901; Spring Hill, May 20, 1901, W. W. Jones. 



Salix lasiandra caudata, Sudw. Bull. Torr. Bot. Club, 20: 43. 

 (W. W. Rowlee). Columbia Falls, May 27, 1897 and Oct. 3, 1893, 

 R. S. Williams, 974. 



Salix lasiandra Lyallii, Sargent. 

 "Thompson Falls," Holzinger, Cont. U. S. Xat. Heil- 3:251. 



Salix padophylla, Rydberg, Bull. Torr. Bot. Club. 28:499. S. 

 padifoUa, Rydberg 1. c. 28: 272. Nearest 6\ Mackcnziana, Barratt. 

 "10 miles east of Monida, 1899, A, & E. Nelson, 5427.'' 



Salix perrostrata, Rydberg. (W. W. Rowlee). Not hither- 

 to found west of the Black Hills. Here a shrub 6-10 feet high. 



Bozeman, May 6, 1901, W. W. Jones; St. Mary's Lakes, July 5, 

 1897, R. S. Williams; Square Butte, Fergus Co., July 16, 1901, F. 



