570 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Leaves broadly lanceolate 4. E. engelmanni. 



Leaves narrowly lanceolate 5. E. serrulatus. 



1. Bucephalus paucicapitatus (Robinson) Greene, Pittonia 3: .56. 1896. 

 Aster paucicapitatus Robinson, Proc. Am. Acad. 29: 829. 1894. 



Aster engelmanni paucicapitatus Robinson, Proc. Am. Acad. 26: 176. 1891. 



Type locality: Olympic Mountains, Washintjton. 



R.\nge: Olympic Mountains. 



Specimens examined: Olympic Mountains, Piper 2195; Flett 819. 



Zonal distribution: Hudsonian. 



2. Bucephalus ledophyllus (A. Gray) Greene, Pittonia 3: 55. 1896. 

 Aster ledopTiyllus A. Gray, Proc. Am. Acad. 16: 98. 1880. 



Aster engelmanni ledophyllus A. Gray, Proc. Am. Acad. 8: 388. 1872. 

 Type locality: "In the Cascade Mountains." Collected by Lyall. 

 Range: British Columbia to Oregon in the Cascade Mountains. 



Specimens examined: Mount Rainier, Piper 2147; Allen284; Mount Adamf^, nenderson, 

 August 5, 1892; SuJcsdorfGl. 



Zonal distribution: Hudsonian. 



3. Bucephalus glaucophyllus nom. nov. 



Aster engelmanni glaucescens A. Gray, Syn. Fl. ed. 2. 1-: 200. 1886, not Aster glancescens 

 Wender. 1832. 



EucepJialus glaucescens Greene, Pittonia 3: 56. 1S9(). 



Type locality: "On Mount Paddo " [Adams], Washington. Collected by Suksdorf. 



Range: Wa.s]iington to California. 



Specimens examined: Mount Adams, Flenderson, August 12, 1892; Suksdorf 651; 

 Howell 401; Flett 1089; Simcoe Mountains, Howell, September 1880; Falcon Valley, Suks- 

 dorf 398; Skamania County, Suksdorf, August 10, 1886. 



Zonal distribution: Hudsonian. 



4. Bucephalus engelmanni (A. Gray) Greene, Pittonia 3: 54. 1896. 

 Aster engelmanni A. Gray, Syn. Fl. 1-: 199. 1884. 



Aster elegans engelmanni D. C. Eaton in S. Wats. Bot. King Explor. 144. 1871. 



Type locality: "Cascade Mountains, latitude 49°." Collected by Lyall. 



Range: British Columbia to Utah and Wyoming. 



Specimens examined; Cascade Mountains, latitude 49°, Lyall; Colville to Cascade 

 Mountains, latitude 49°, Lyall in 1860; head of Twisp River, Whited 39; Atanum River, 

 Henderson, August 2, 1892; Stehekin, Whited 1401; near Skagit Pass, Lake cfc Hull 693; 

 North Fork Bridge Creek, Elmer 649; without locality, Vasey 526; Mount Stuart, Sandberg 

 & Leiherg 559; Clealum Lake, Cotton 869, Fort Simcoe, Cotton 1562. 



Zonal distribution: Canadian and Hudsonian. 



5. Bucephalus serrulatus Greene, Pittonia 3: 55. 1896. 



Type locality: Mount Adams. Collected by Suksdorf (no. 1563). 



Known only from the type collection. The plant is exceedingly close to E. engelmanni. 



ASTBR. 



Leaves coriaceous, serrate; involucre well imbricated. 



Involucre campanulate, glandular 1. A. conspicuus. 



Involucre broadly turbinate, not glandular 2. A. radulinus. 



Leaves membranaceous. 



Involucre viscid or pruinose-glandular. 



Heads less than 1 cm. broad 3. A. campestiis. 



Heads over 1 cm. broad. 



Leaves entire, firm; bracts rather rigid, well imbricated. 4. A. integrifolius. 



