PIPER FLORA OF THE STATE OF WASHINGTON. 547 



Stems few-leaved; involucre a series of equal bracts and a few short 

 calyculate ones. 



Flowers white; involucre nearly glabrous 3. H. alhifiorum. 



Flowers yellow. 



Heads small, black-hairy A. H. gracile. 



Heads larger; not black-hairy. 

 Involucre densely long-hairy. 



Cauline leaves ample, half-clasping at the broad 



bases 5. //. longiberbe. 



Cauline leaves much reduced 6. H. scouleri. 



Involucre with few or no long hairs. 



Leaves densely hirsute 7. H. griseum. 



Leaves nearly smooth 8. H. cynoglossoides. 



1. Hieracium coliunbianum Rydberg, Bull. Torr. Club 28:513. 1901. 

 Type locality: "Priest River Valley," Idaho. 



Range: North Idaho and adjacent Washington. 



Specimens examined: Dartford, Kreager, September 12, 1903; Loon Lake, Winston, 

 July 20, 1897; Spokane County, Suksdorf 935; Peshastin, Sandberg dc Leiberg 510. 

 Zonal distribution: Arid Transition. 



2. Hieracium canadense Michx. Fl. 2: 86. 1803. 

 Type locality: "Hab. in Canada." 



Range: British Columbia to Nova Scotia, south to Oregon and New Jersey. 

 Specimens examined: Loomis Elmer 570; Pullman Piper, August 5, 1893; Elmer 307; 

 Spokane Piper, July 26, 1896; Coupeville Gardner 422. 

 Zonal distribution: Arid Transition. 



3. Hieracium albiflorum Hook. Fl. Bor. Am. 1: 298. 1833. 



? Hieracium vancouverianum Arvet-Touv. Spicil. Hier. 10. 1874. 



Type locality: "Rocky Mountains north of Smoking River, Lat. 56°." Collected by 

 Drummond. 



Range: British Columbia and Alberta to California and Colorado. 



Specimens examined: Montcsano, Heller 3918; Grays Harbor, Wilkes Expedition; 

 Cascade Mountains, latitude 49°, Lyall in 1859; Silverton, Bouck 113; Seattle, Piper 502; 

 Mount Rainier, Piper, August, 1895; upper Nisqually Valley, Allen 11; Skagit Pass, Lake 

 & Hull, August 24, 1892; Colville, Lyall in 1860; Falcon Valley, Suksdorf 427; Nason 

 Creek, Sandberg c& Leiberg 611; Conconully, Whited 1323; Bridge Creek, Elmer 688, in 

 1897; Tukanon River, Za^e 742; Mount Carlton, Zrm^er 303; Lake Kalispcl, Z'rea^er 347. 



Zonal distribution: Transition and Canadian. 



4. Hieracium gracile Hook. Fl. Bor. Am. 1: 298. 1833. 

 Hieracium triste gracile A. Gray, Bot. Cal. 1: 441. 1876. 

 Hieracium hookeri Steud. Nom. ed. 2. 1:763. 1840. 

 Hieracium arcticum Froel.; DC. Prod. 7: 209. 1838. 



Type locality: Rocky Mountains. Collected by Drummond. 



Range: Alaska to Oregon and Colorado. 



Specimens examined: Cascade Mountains, latitude 49°, Lyall in 1859; Silverton, Bouck 

 116- Mount Rainier, Piper 2155; Allen2m; Mount AA&ms, Suksdorf A28; P/e« 1082, 1398; 

 Stevens Pass, Sandberg & Leiberg 716; Skagit Pass, Lake & Hull, August 24, 1892; Yakima 

 County, Henderson, August 5, 1892; Wenache Mountains, Elmer 449; Horseshoe Basin, 

 Elmer 726; Blue Mountains, Piper, July, 1896. 



Zonal distribution: Arctic. i 



6. Hieracium longiberbe Howell, Fl. N. W. Am. 395. 1901. 

 Type locality: "On clid's along the Columbia river near the Cascades." 

 Range: Oregon and Washington on cliffs in the Columbia Gap. 



