PIPER—FLORA OF THE STATE OF WASHINGTON. 101 
46° to 49°, Lyall in 1860; Kalispel Valley, Kreager 363; Usk, Kreager 366; Cotton 432; 
Nason Creek, Sandberg & Leiberg 694; without locality, Vasey 66; Waitsburg, Horner 
21; Pullman, Hull 629; Piper, July, 1897. 
ZONAL DISTRIBUTION: Transition. 
SAGITTARIA. ARROWHEAD. 
Beak of the akene horizontal or oblique, more than one-fourth its length. . 1. S. latifolia. 
Beak of the akene less than one-fourth its length. 
Bracts 8 to 20 mm. long; bog plant.....-...--------------------- 2. S. arifolia. 
Bracts 4 to 6 mm. long; water plant........-.-------------------- 3. S. cuneata. 
1. Sagittaria latifolia Willd. Sp. Pl. 4: 409. 1805. Waparo. 
Sagittaria sagittifolia macrophylla Hook. Fl. Bor, Am. 2: 167. 1839. 
Sagittaria sagittifolia vulgaris Hook. loc. cit. 
Sagittaria esculenta Howell, Fl. N. W. Am. 679. 1903. 
Type Locaity: “Habitat a Canada ad Carolinam.” 
Rance: Throughout most of North America. 
SPECIMENS EXAMINED: Cascade Mountains, 49°, Lyall in 1858; Seattle, Piper, August, 
1892; Chambers Lake, Henderson, August, 1892; Falcon Valley, Suksdorf'673. 
ZONAL DISTRIBUTION: Transition. , 
This is the wapato or wappatoo, formerly an important food plant of the Indians. The 
introduction of the European carp into the Columbia River has nearly caused the exter- 
mination of this plant, where it used to be abundant. 
2. Sagittaria arifolia Nutt.; J. G. Smith, Ann. Rep. Mo. Bot. Gard. 6: 32. 1894. 
Type LocaLity; Oregon. Collected by Nuttall. 
Rance: British Columbia to Quebec, south to California and Kansas. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 1318; Lake Chelan, Lake & 
Hull, August, 1892; Colville, Lyall in 1860; Union Flat, Piper 3049, 3049; Lake & Hull 626; 
Pullman, Hardwick, July, 1895; Prosser, Griffiths & Cotton 806. 
ZONAL DISTRIBUTION: Arid Transition. 
2a. Sagittaria arifolia stricta J. G. Smith, Ann. Rep. Mo. Bot. Gard. 6: 34. 1894. 
Type Locauiry: Falcon Valley, Klickitat County, Washington. Collected by Suksdorf. 
Rance: Washington. 
SPECIMENS EXAMINED: Falcon Valley, Suksdorf 674. 
3. Sagittaria cuneata Sheld. Bull. Torr. Club 20: 283. 1893. 
Type Tocauity: “East Battle Lake, Otter Tail County,” Minnesota. 
Rance: Washington to Minnesota, north to British Columbia and Saskatchewan. 
SPECIMENS EXAMINED: Phileo Lake, Spokane County, Suksdorf 2262. 
VALLISNERIACEAE. 
ANACHARIS. 
1. Anacharis canadensis (Michx.) Planch. Ann. Sci. Nat. ITT. 11: 75. 1849. 
Elodea canadensis Michx. Fl. 1: 20. 1803. WATERWEED. 
Philotria canadensis Britton, Science II. 2: 5. 1895. 
Type Locauity: ‘Hab. in rivulis Canadae.” 
Rance: Throughout most of North America. 
SPECIMENS EXAMINED: Green Lake, Piper, September, 1898; Lake Chelan, German in 
1897. 
