MACKENZIE: NOTES ON CAREX 543 
ferent in appearance from the densely cespitose plants with much 
less developed vegetative growth, acute scales, and _ perigynia 
ranging from 3 to 4 mm. in length, with beak shorter than the body, 
which represent the other extreme of the series. However, all 
kinds of intermediate combinations appear, and make separation 
impossible except arbitrarily. 
Other plants with narrow involute leaves collected in very dry 
situations also look quite different, but their peculiar aspect 
seems wholly due to their dried-up condition, as no structural 
differences have been found. 
The species as here treated ranges from Vancouver Island and 
the Canadian Rockies south through Washington and Oregon to 
the higher Sierras of California and eastward in the higher moun- 
tains of Nevada and Utah. It seems common in Colorado, 
Wyoming, Montana, and Idaho. It has been found in northern 
Michigan. It is to be expected in northern New Mexico and 
possibly Arizona, and its northern range in western Canada is 
yet to be ascertained. 
SPECIMENS EXAMINED: 
CANADA: Rocky Mt. Park, Macoun 64056, July 8, 1904 (N. Y.); 
between Kettle and Columbia Rivers, Macoun 63318, June 6, 
1902, and 63319, July 9, 1902 (N. Y.), and 63320, July 19, 1902 
(N. Y.); Nanaimo, Vancouver Island, Macoun 76742, July 13, 
1908 (N. Y.); Medicine Hat, Assiniboia, Macoun 7402, June 4, 1894 
(C.); Mountain Post, Assiniboia, Macoun 10780, June 11, 1895 
(N. Y., H); Revelstoke, Shaw 834, July 6, 1905 (N. Y.); Revelstoke, 
Macoun 57A, May 19, 1890 (C.); Lake Louise, Macoun 64055, 
July 20, 1904; Mt. Arrowsmith, Rosendahl 2023, June 28, 1907 
(N. Y., H); Qu’Appelle Valley, Macoun 49, June 22, 1879 (H); 
Yale, Macoun, June 17, 1876 (H); Grand Valley, Macoun 261, 
June 16, 1880 (H); Trail to Asalkan Glacier, British Columbia, 
Brainerd, Aug. 11, 1897 (B); Vancouver, Macoun, July 27, 1887 
(B); Calgary, Macoun 25460, June 7, 1897 (D. C.); Mt. Arrow- 
smith, Vancouver Island, Macoun 30969, July 17, 1887 (D. C.); 
Rogers Pass, Selkirk Mts., Macoun 30968, July 29, 1890 (D. C.); 
Elbow River, Rocky Mts., Macoun 25461, July 15, 1897 4 bog tees 
Esquimault, Vancouver Island, Macoun 376, June 9, 1893, and 
