1922] 



PFEIFFER — MONOGRAPH OF THE ISOETACEAE 131 



Distribution: California, Oregon, Washington, Vancouver. 



Specimens examined: 

 California: Mt. Tamalpais, Marin Co., 13 June, 1892, Palmer 



2356 (U. S. Nat. Herb.); Tamalpais, June, 1891, Brandegee 

 (N. Y. Bot. Gard. Herb.); Mt. Tamalpais, Marin Co., 13 

 June, 1892, Mrs. Brandegee (Mo. Bot. Gard. Herb, and Univ. 

 Minn. Herb.); Mt. Tamalpais, Marin Co., near the big 

 spring on trail to Larsens, 28 June, 189G, J\Iiss Eastwood 

 (Mo. Bot. Gard. Herb.) ; Pine Ridge, Fresno Co., 25 May, 

 1901, Thompson (Mo. Bot. Gard. Herb.); Soquel Point, be- 



tween Santa Cruz and Capitola, 28 May, 1902, Mrs. C. H. 

 Thompson (Mo. Bot. Gard. Herb.) ; Soquel Point, Santa 

 Cruz, summer, 1903, Thompson (Mo. Bot. Gard. Herb.) ; San 

 Diego, 6 March, 1895, Brandegee (Mo. Bot. Gard. Herb.) ; 

 Glacier Point Meadows, edges of pools in black mucky soil, 

 alt. 7100 ft. (Canadian Life Zone), 6 July, 1914, Smiley 

 492 (Gray Herb.) ; Tuolumne Meadows, pools back of Muir 

 Lodge, Yosemite, alt. 8500 ft. (Canadian Life Zone), 13 

 August, 1916, Smiley 747 (Gray Herb.) ; Coste Madera, June, 

 1887, Curran (N. Y. Bot. Gard. Herb.) ; partially submerged 

 in sluggish stream, Williams Ranch, Tuolumne Co., 14 June, 

 1895, Blasdale (N. Y. Bot. Gard. Herb.). 



Oregon : low pondy places and on high banks in springy situations 



in Willamette Valley, Salem, Silverton, etc., June and July, 

 1871, Hall 693 (Mo. Bot. Gard. Herb., Gray Herb, and U. 

 S. Nat. Herb.) ; low grassy places, Oregon, 1871, Hall (Gray 

 Herb.); "terrestrial, under scrub-oaks/' Woodburn, 1 June, 

 1882, Thos. J. Howell (Mo. Bot. Gard. Herb, and U. S. Nat. 

 Herb.) ; on springy soil and in water near Milwaukee, July, 

 1880, J. Howell & Thos. J. Howell 303 (Gray Herb.) ; on 

 damp springy soil and in water, near Milwaukee, July, 1880, 

 J. Howell (Gray Herb.) ; Oregon, 1886, T. J. Howell 613 

 (Gray Herb.) ; Gladstone, 14 July, 1894, T. J. Howell 1526 

 (Mo. Bot. Gard. Herb., U. S. Nat. Herb., and Univ. Minn. 

 Herb.); in shallow pool near south fall, Silver Creek Falls, 

 Marion Co., 29 May, 1921, Nelson (Peck) 3737 (U. S. Nat. 



Herb. ) . 



Washington: Columbia River 183-, Nuttall (Mo. Bot. Gard. 



Herb.), type?; springs and meadows, W. Klickitat Co., 

 May, August, 1881, Suksdorf (Mo. Bot. Gard. Herb, and U. 





