226 BOTANICAL GAZETTE [OCTOBER 
Montana and southern Alberta. While examination of a large 
number of specimens indicates that it passes gradually into the 
more typical form of the species, as.do many other varieties, its 
recognition as a variety should help to a better understanding of 
the range of expression in S. caudata. Little is known of its height 
other than the notes given by STANDLEY, which indicate a lower 
stature than that of the species. The branchlets frequently are 
shorter and more divaricate; the leaves are very small, 5—8 cm. 
long, 7-12 mm. wide, seldom exceeding 1 cm. in width, common 
sizes being 6cm.xX8mm., 7cm.Xg-10 mm., or on sterile shoots 
8-10 cm. X11-16mm., strongly glandular-serrulate, as are the 
stipules also. The aments are 2-3 or 3.5 cm. long, rather lax; the 
scales 3-3.5mm. long, linear-lanceolate, acute to truncate or 
toothed, and glabrate. The capsules are 6.5-8 mm. long. 
The range of variety. parvifolia is in the Rocky Mountains from Banff, 
Alberta, to the Yellowstone Park in Wyoming and the Wahsatch Mountains 
near Ogden, Utah, also in the mountains of western Idaho and eastern Oregon, 
and westward in Oregon to the eastern slope of the Cascades in Wasco County. 
ERTA.—Rocky Mountains Park, NV. B. Sanson 164 m., June 17, 1911 
(B); 265, July 5, 1911 (B); 413, 414, August 21, 1911 (B); 2056, June 22, 
1912 (B). 
MonTAanaA.—Flathead County, Glacier National Park, 6-8 ft. high, boggy 
meadow, along Swiftcurrent Creek, below Lake McDermott, alt. about 1350 
m., P. C. Standley 16865 (type) August 1, 1919 (N); thicket along lake, abun- 
dant, very slender, 6-12 ft. high, vicinity of Glacier Hotel (‘‘Lewis’s”), at head 
of Lake McDonald, alt. 900-1050 m., Standley 17906, August 22, 1919 (N); 
Deer Lodge or Powell counties, Deer Lodge Valley, mountain streams, 5000 
ft. ubaat J.W. Blankinship 788, m. f., May 27, 1906 (N). 
Wyominc.—Yellowstone National eck. Upper Fire Hole Basin, Yellow- 
stone bake J. M. Coulter, Hayden Survey, July 1872 (N 253728, fr.); along 
Lamar Creek, J. N. Rose 406, fr., August 20, 1893 (N). 
Ipano.—Fremont County, dene an irrigating ditch, St. Anthony, Merrill 
and Wilcox 899, fr., July 6, 1901 (B, N); Washington County, Weiser, alt. 
2200 ft., M. E. Jones 6548, July 5, 1899 (N)._, 
OrEGON.—Union County, a small tree, bank of Catherine Creek, alt. 3500 
ft., W. C. Cusick 2385, m. f. fr., May 30, June 28, 1900 (N); Grant County, 
Prairie City, alt. rog4om., W. W. Eggleston 13700, September 5, 1916 (N); 
Wasco County, along streams in yellow pines, near head of Warm Springs 
River, alt. 3000 ft., HE. I. Applegate 2777, September 7, 1898 (N). 
Ur die: Mountains near Ogden, Hayden’s Expedition, 1872 (N, sheet 
26198 in part, with S. lutea Nutt.). 
