128 Rhodora [June 



between Sheridan and Buffalo, altitude 3,500-5,000 feet, June 15- 

 July 15, 1900, Frank Tweedy, no. 3,558 (R&Y); Soda Lakes, Sept. 

 24, 1898, A. Nelson, no. 5,352 (R); McGill's Ranch, Aug. 9, 1895, 

 A. Nelson, no. 1,668 (R); Rockyford, July 6, 1896, A. Xelson, no. 

 2,219 (R). Colorado: Saguache, Sept. Wolf A Rothrock (R); 

 Lee's Lake, Sept. 24, 1896, C. S. CrandaU, no. 2,527 (H); Hiram 

 Prince Lake, July 10, 1908, II'. II'. Robbing, no. 5,714 (11). Utah: 

 1875, C. C. Parry, no. 10.5 (ID. Nevada: Thousand Spring Valley, 

 (3,000 feet altitude, Sept., 1868, S. Watson, no. 1,138 (H & Y); Truckee 

 Pass, 4,000 feet altitude, July, 18(17, S. Watson, no. 1,115 (H & Y); 

 Humboldt Lake, 4,000 feet altitude, Aug., 1807, 8. Watson, no. 1,13!) 

 (H & Y); Pyramid Lake, May, L879, Miss 8. A. Plummer (H). New 

 Mexico: Northern part, 1851 52, C. Wright, nos. 1,894 and 1,895 

 (H & Y). Arizona: Santa Cruz (reek near Tucson, May, 1881, 

 ./. C. Lemmon, no. 299 (H). California: 1833, Douglas (H); 

 Dr. Coulter, no. 719 (H); Soldier's Home, in reservoir, Los Angeles 

 County, June 19, 1902, LeRoy Abrams, no. 2,575 (H); shallow borders 

 of ponds, San Bernadino Mountains, Aug. 1882, 8. B. &■ II'. F. Parish, 

 no. 1,429 (Y); Los Angeles, Rev. ./. C. Netin,no. 516 (H); Monterey, 

 Oct. 1, 1894, (J. P. Snell (R); ponds, San Francisco, 1808-9, .1. Kdtbgg 

 c(- II'. G. Harford, no. 950 (Y); Berkeley, July 18, 1895, ./. II'. Blankin- 

 ship (H); common in sloughs, Suisun, Solano County, June 0, 1903, 

 C. F. Baker, no. 3,215 (H); Cuyamaca Lake, 1,000 feet altitude, San 

 Diego County, June 20, 1903," LeRoy Abrams, no. 3,906 (A&H); 

 Monterey, Oct. 1, 1904, C. P. Snell (A no. 522,547); Santa Barbara, 

 1879, Mrs. Elwood Cooper (H); hanks of Russian River, north of 

 Cloverdale, July. 9, 1902, .1. .1. Heller, no. 5,825 (A & H k R). Ore- 

 gon: near Prineville, 955 m. altitude, Aug. 28, 1894, ./. B. Leiberg, 

 no. 847 (H); 1871, Klihu Hall, no. 494 (H & Yi; Cascade Mountains, 

 49° North Latitude, 1859, Dr. Li/all (H). WASHINGTON: shallow- 

 places in the Columbia River, Klickitat Count v, Sept. 15, and Oct., 

 1891, Wm. Suksdorf, no. 2,062 (ID; Okanagan River, Oct. 10, 1880, 

 S, Watson, no. 394 (A&H). British Columbia: Kamloops, June 

 20, 1889, ./. Macotm (H and C no. 4,151); in water, Alhemi, Van- 

 couver Island, Aug. 2, 1887, ./. Macoun (C no. 4,145). 



This species growing in so many parts of the world and varying so 

 greatly, as do man}' species of the genus, has naturally received many 

 names. The great majority of these are by common consent treated 

 as synonyms of P. peetinatus, but there are some better marked states 

 of the plant which are insistently maintained as distinct species. The 

 English botanists, Fryer and Bennett and others, treat as P. inferrup- 

 tvs Kit. (P. flabellatus Bab.) a plant with or without broad 3-5- 

 nerved lower leaves and with three-keeled fruits. Morong included 

 P. intemeptus in his Naiadaceae of North America on the basis of 

 sterile, broad-leaved plants, collected in Manistee, Michigan, by E. J. 



