PIPER—FLORA OF THE STATE OF WASHINGTON. 569 
21. Erigeron canadensis L. Sp. Pl. 2: 863. 1753. 
Tyre Locauity: “Canada, Virginia.” 
Rance: Temperate North America. 
SPECIMENS EXAMINED: Mason County, Aineaid 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. Pl. 2: 863. 1753. 
Type Locatiry: European. 
Rance: 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, Sandberg & 
Leiberg 765; Stampede Tunnel, Henderson, July 26, 1892. 
ZONAL DISTRIBUTION: Arid Transition and Canadian. 
22a. Erigeron acris debilis A. Gray, Syn. Fl. 1°: 220. 1884. 
Type Locaiity: “Northern Rocky and Cascade Mountains, Montana, Canby, Sargent 
at Woodruffs Falls, * * * ; Mount Paddo, Suksdorf’, Howell.” 
Rance: Alaska to Labrador south to Washington and Montana. 
SPECIMENS EXAMINED: Olympic Mountains, //ett 820; Mount Adams, Suksdorf 70, 402, 
2170; Howell in 1882; Flett 1156; Henderson, August 9, 1892; Skamania County, Suksdorf 
2170; Loomis, Elmer 591. 
ZONAL DISTRIBUTION: Arctic. 
? 
ERIGERON GLABELLUS MUCRONATUS Hook. FI. Bor. Am, 2: 19. 1834. Type locality, 
‘“ Plentiful on low plains of the Columbia, near the coast.’’ We have been unable to deter- 
mine what this plant is from the brief description. 
SERICOCARPUS. 
1. Sericocarpus rigidus Lindl. in Hook. FI. Bor. Am. 2: 14. 1834. 
Sericocar pus oregonensis Nutt. Trans. Am. Phil. Soc. 7: 302. 1840. 
Type Locauity: “Columbia River.” Collected by Scouler. 
Rance: Washington to California in the coast region. 
SPECIMENS EXAMINED: Whidby Island, Gardner 154; Tacoma, Flett 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. ¢. 16. 1871. 
Type Locauiry; Mount Rainier, Washington Collected by Tolmie. 
Rance: Cascade Mountains, Washington and Oregon. 
SPECIMENS EXAMINED: Mount Rainier, Allen 143; Piper 498, 2156; Tolmie; Mount 
Stuart, Elmer 1094, without locality, Brandegee 18, 20, 32; Mount Adams, Suksdorf’ in 
1878 and 522; Flett 1091. 
ZONAL DISTRIBUTION: Arctic. 
EUCEPHALUS. 
Rays purple or violet. 
Rays white, becoming pink-tinged..-.....-.2..----- 2-22-2222. 2.. 1. E. paucicapitatus. 
Leaves tomentose beneath ..........2.-.---.-22.-.-----.... 2. E. ledophullus. 
Leaves glabrous. 
Leaves glaucous, broadly lanceolate ....................- 3. E. glaucophyllus. 
Leaves green. 
