( 262 ) 
Montana: Belt Mountains, 1883, Scrzbner, no. 260. 
ALBERTA: Sheep Mountain, 1895, Macoun (Herb. Geol. 
Surv. Can., 20. 73663). This specimen has unusually broad 
and obtuse leaves, therefore, approaches both S. reticulata 
and S. nivalis. 
5. SALIX NIVALIS Hook. Fl. Bor. Am. 2: 152; Salix re- 
ticulata nivalis Anders. in DC. Prod. 16: 301. 
It is nearest related to S. saw7montana, and perhaps rep- 
resents only the most depauperate form thereof. It differs in 
the small leaves less than 1 cm. long, which are much more 
reticulate than in S. sax¢montana. Itis much less related to 
S. reticulata. It differs in the small leaves, the 3—12-flow- 
ered short catkins and very short peduncles, the shorter and 
broader and almost glabrous bracts, the glabrous filaments, 
and shorter capsules. 
S. nivalis is confined to the Rocky Mountains of British 
America and Montana at an altitude of 2500 to 3500 m. 
Montana: Old Hollowtop, Pony Mts., July 7 and 9, 1897, 
Rydberg & Bessey, no. 3926. 
YELLOWSTONE Park: Electric Peak, Aug. 18, 1897, Ayd- 
berg d& Bessey, no. 3925. 
IpaHo: Mt. Chauvet, July 29, 1897, Rydberg d- Bessey, 
20. 3924. 
Canapian Rockies: Old Man’s River, 1883, Dawson 
(Herb. Geol. Surv. Can., zo. 18813); Avalanche Mountain, 
1890, Macoun (no. 18842),* Sulphur Mountain, 1891 (no. 
18841, 18840"); Mt. Aylmer (xo. 28840"); Moose Mountain, 
1897; Silver City, 1885. 
6. SALix GLActaAtis Anderson, Oefvers. Vet. Akad. Foer- 
handl. 15, 131 and Proc. Am. Acad. 4: 274. 
The only specimens I have seen that agree with the 
description of S. glacial’s were collected at Port Barrow by 
Murdock, zo. 29. They are characterized by the smooth and 
shining light brown bark, the brown glabrous bud scales, the 
small, oval leaves, which are rather thin, not reticulate and 
e numbers cited in parenthesis are those of the herbarium of the Geo- 
logical and Natural History Survey of Canada. 
