PIPER — FLORA OF THE STATE OF WASHINGTON. 569 



21. Erigeron canadensis L. Sp. PI. 2: 863. 1753. 

 Type locality: "Canada, Virginia." 



Range: Temperate North America. 



Specimens examined: Mason County, Kincaid in 1892; North Yakima, Watt, August, 

 1895; Leavenworth, Whited, August 6, 1896; Lake Chelan, Lake & Hull, August 14, 1892; 

 Loomis, Elmer 567; Prosser, Cotton 886. 



Zonal distribution: Transition and Upper Sonoran. 



22. Erigeron acris L. Sp. PI. 2: 863. 1753. 

 Type locality: European. 



Range: British Columbia to Labrador south to Oregon and Colorado. Europe. Asia. 



Specimens examined: Goose Lake, Flett 1156; Falcon Valley, Suksdorf 353; Yakima 

 Region, Brandegee 878; Cascade Mountains, 49°, Lyall in 1860; Stevens Pass, Sandherg & 

 Leiberg 765; Stampede Tunnel, Henderson, July 26, 1892. 



Zonal distribution: Arid Transition and Canadian. 



22a. Erigeron acris debilis A. Gray, Syn. Fl. l^: 220. 1884. 



Type locality: "Northern Rocky and Cascade Mountains, Montana, Canhy, Sargent, 

 at Woodruffs Falls, * * * ; Mount Paddo, Suksdorf, Howell." 



Range: Alaska to Labrador south to Washington and Montana. 



Specimens examined: Olympic Mountain.s, Flett 820; Mount Adams, SvJcsdorf 70, 402, 

 2170; Howell'm 1882; Flett 1156j Henderson, August 9, 1892; Skamania County, Suksdorf 

 2170; Loomis, Elmer 591. 



Zonal distribution: Arctic. 



Erigeron olabellus mucronatus Hook. Fl. Bor. Am. 2 : 19. 1834. Type locality, 

 " Plentiful on lorn plains of the Columbia, near the coast." We have been unable to deter- 

 mine what this plant is from the brief description. 



SERICOCARPirS. 



1. Sericocarpus rigidus Lindl. in Hook. Fl. Bor. Am. 2 : 14. 1834. 



Sericocarpus oregonensis Nutt. Trans. Am. Phil. Soc. 7: 302. 1840. 



Type locality: "Columbia River." Collected by Scouler. 



Range: Washington to California in the coast region. 



Specimens examined: Whidby Island, (rarcZner 1.54; Tacoma, FZe« 164, 876; Olympia, 

 Henderson 1706; McAllisters Lake, Henderson, July 22, 1888; Fort Vancouver, Tolmie. 



Zonal distribution: Humid Transition. 



OREASTRUM. 



1. Oreastrum alpigenum (Torr. & Gr.) Greene, Pittonia 3: 147. 1896. 



Aster alpigenus A. Gray, Proc. Am. Acad. 8: 389. 1872. 



Aplopappus alpigenus Torr. & Gr. Fl. N. Am 2: 241. 1842. 



Aster pulchellus D. C. Eaton in S. Wats. Bot. King Explor. 143. t. 16. 1871. 



Type locality; Mount Rainier, Washington Collected by Tolmie. 



Range: Cascade Mountains, Washington and Oregon. 



Specimens examined: Mount Rainier, Allen 143; Piper 498, 21.56; Tolmie; Mount 

 Stuart, Elmer lOQi, without locality, Brandegee 18, 20, 32; Mount Adams, Suksdorf in 

 1878 and 522; FleU 1091. 



Zonal distribution: Arctic. 



EUCEPHALTJS. 



Rays purple or violet. 



Rays white, becoming pink-tinged 1 . E. paucicapitatus. 



Leaves tomentose beneath 2. PJ. ledophyllus. 



Leaves glabrous. 



Leaves glaucous, broadly lanceolate 3. E. glaucophyllus. 



Leaves green. 



