[Vor. 3 
168 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Distribution: British Columbia, south to Colorado and 
Idaho. 
Specimens examined: 
British Columbia: Field, 12 July, 1904, Farr (Univ. Penn. 
Herb.) ; Ottertail Drive, near Field, 15 July, 1905, Farr 817, 
818 (Univ. Penn. Herb.) ; border of an alkali marsh, Similka- 
meen River, 10 June, 1905, Macoun 69356 (Gray Herb.); 
Lower Fraser River, N. Lat. 49°, Oregon Boundary Commis- 
sion, coll. of 1859, Dr. Lyall (Gray Herb.). 
Montana: Big Fork, Aug., 1908, Mrs. Joseph Clemens 
(Field Mus. Herb. and Mo. Bot. Gard. Herb.). 
Yellowstone National Park: Mammoth Hot Springs, 5 July, 
1899, Blankenship (Gray Herb.) ; about willow elumps on river 
bottom, Snake River, 12 Aug., 1899, 4. «€ E. Nelson 6402 (Gray 
Herb., U. S. Nat. Herb., and Mo. Bot. Gard. Herb.); Fitz- 
gerald's Ranch, near Gardiner Mountain, 3 July, 1902, 
Mearns 1493 (U. S. Nat. Herb. and Field Mus. Herb.). 
Wyoming: low ground, Adam's Ranch, Jackson's Hole, 15 
July, 1901, Merrill & Wilcox 967 (U. S. Nat. Herb.) ; sandy 
soil, Blue Lakes on Wind River, 6 July, 1881-82, Forwood 
(U. S. Nat. Herb.); Wind River, Aug., 1894, A. Nelson 760 
(Gray Herb. and U. S. Nat. Herb.); Horse Creek, coll. of 
1893, A. Nelson 100 (U. S. Nat. Herb.) ; Green River, 26 July, 
1894, A. Nelson 1036 (Gray Herb., U. S. Nat. Herb., and Mo. 
Bot. Gard. Herb.) ; Dale Creek, near Sherman, 29 July, 1884, 
Letterman (Mo. Bot. Gard. Herb.) ; Evanston, 10 July, 1897, 
Williams (U. S. Nat. Herb.) ; La Barge, Uinta Co., 18 July, 
1894, Stevenson 201 (U. S. Nat. Herb.) ; Myer's ranch, Bear 
River, south of Evanston, alt. 2285—2440 m., 26 July, 1902, 
Pammel 6 Blackwood 4044 (Mo. Bot. Gard. Herb.). 
Colorado: N. Lat. 39-412, coll. of 1862, Hall £ Harbour 332, 
in part (Phil. Aead. Nat. Sei. Herb. and Mo. Bot. Gard. 
Herb.), and 115, in part (Gray Herb.); Colorado Springs, 
Мау, 1878, Jones (U. б. Nat. Herb. 223024, in part). 
Idaho: open grassy stream lands, Mackay, Custer Co., 1 
Aug., 1911, Nelson & Macbride 1500 (Mo. Bot. Gard. Herb.) ; 
Areo, 19 June, 1893, E. Palmer 193 (U. S. Nat. Herb.). 
