PIPER FLORA OF THE STATE OF WASHINGTON. 101 



46° to 49°, Lyall in I860; 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. . l^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 latifoUa Willd. Sp. PI. 4: 409. 1805. Wapato. 

 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 locality: "Habitat a Canada ad Carolinam." 



Kange: Throughout most of North America. 



Specimens examined: Cascade Mountains, 49°, Lyall in 1858; Seattle, Piper, August, 

 1892; Chambers Lake, Henderson, August, 1892; Falcon Valley, SuksdorfQlS. 



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. 



Range: British Columbia to Quebec, south to California and Kansas. 



Specimens examined: West Klickitat County, SuJcsdorf 1318; Lake Chelan, Lake cfe 

 FwZ/, August, 1892; Colville,L2/aZZin 1860; Union Flat, Piper 3049, 3049; Lake (& Hull Q2&; 

 Pullman, Hardwick, July, 1895; Prosser, Gnffiths cfe Cotton 806. 



Zonal distribution: Arid Transition. 



2a. Sagittaria arifolia stricta J. G. Smith, Ann. Rep. Mo. Bot. Gard. 6: 34. 1894. 

 Type locality: Falcon Valley, Klickitat County, Washington. Collected by Suksdorf. 

 Range: Washington. 

 Specimens examined: Falcon Valley, Suksdorf Q74. 



3. Sagittaria cuneata Sheld, Bull. Torr. Club 20: 283. 1893. 

 Type tocality: "East Battle Lake, Otter Tail County," Minnesota. 



Range: Washington to Minnesota, north to British Columbia and Saskatchewan. 

 Specimens examined: Phileo Lake, Spokane County, /Sw^stfor/ 2262. 



VAILISNERIACEAE. 

 ANACHARIS. 



1. Anacharis canadensis (Michx.) Planch. Ann. Sci. Nat. HI. 11: 75. 1849. 



Elodea canadensis Michx. Fl. 1: 20. 1803. Waterweed. 



Philotria canadensis Britton, Science IL 2: 5. 1895. 



Type locality : " Hab. in rivulis Canadae." 



Range: Throughout most of North America. 



Specimens examined: Green Lake, Piper, September, 1898; Lake Chelan, Gorman in 

 1897. 



