[Vor. 11 
314 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Distribution: abundant in late-drying depressions; Oregon, 
southward through the Sacramento and San Joaquin Valleys and 
foothills of the Sierra Nevada Mts. of California. 
Specimens examined: 
Oregon: Pathologium, Corvallis, 30 Мау, 1915, Scherer (Ore); 
ploughed field near Corvallis, 31 May, 1892, Mulford (G and 
M); 1 mile west of Corvallis, 8 June, 1912, Weniger (Ore.); in 
field on damp ground, 10 May, 1899, Getty (Ore.); golf links, 
Corvallis, 10 May, 1915, Otto Elmer (Ore.); in fields west of 
Corvallis, 27 May, 1902, Raber (Ore.). 
California: between Exeter and Kaweah, Tulare Co., 26 April, 
1895, Eastwood (С); near Suisun, May, 1886, Greene 10 
(Stanford); Live Oaks, San Joaquin Co., March, 1883, Rattan 
(G and Stanford); Live Oaks, San Joaquin Co., April, 1885, 
Titus (Stanford); Hernandez, San Benito Co., 16 May, 1903, 
Lathrop (Stanford); Lewis, Mariposa Co., 17 April, 1892, 
Congdon (Stanford); Stanislaus, 1853-54, Bigelow (G); Thal- 
heim, Stanislaus Co., 6 March, 1916, A. L. Grant 647 (M and 
Stanford); growing in late drying depressions in stiff clay soil, 
often coming into flower while still in the water, Elmira, 
Solano Co., 3 May, 1901, К. Brandegee 168 (M, R. Mt., Calif., 
Stanford, and Pomona) ; Sweeney Creek, Solano Co., 22 April, 
1919, Jepson 8252 (Cornell and Calif.) ; small colonies on sites 
of vernal pools, Elmira, Solano Co., 6 May, 1903, C. F. Baker 
2923 (G, M, R. Mt., and Pomona); between Santa Rosa 
Sebastopol, 8 June, 1905, К. Brandegee (M, В. Mt., and 
Pomona); near Vacaville, 2-6 May, 1891, Jepson (Calif); 
low ground, Santa Rosa, Sonoma Co., 27 April, 1918, Abrams 
6901 (Stanford); Burns Valley, Lake Co., May, 1902, Bowman 
2 (Stanford); plains of Sacramento Valley, Hartweg (б, lype 
collection); Sacramento, 7 April, 1918, Hannibal (Stanford); 
College City, Colusa Co., 6 April, 1915, Johnson (Calif.); 
Clear Creek, Butte Co., 175 ft. alt., 15-30 April, 1897, Н. Ё. 
Brown 188 (М, В. Mt., and Stanford); Chico, April, 188% 
Gray (С); Chico, April, 1899, Austin 158 (М and Calif) 
Chico-Coville Road, 7 miles east of Chico, 24 April, 1914, 
Heller 11314 (Cornell and Stanford); fields, Butte Co., May, 
1897, Bruce 2107 (Stanford); near Biggs, Butte Co., 15 May, 
