PIPER FLORA OP THE STATE OF WASHINGTON. 559 



3a. Chrysothamnus nauseosus gxaveolens (Nutt.)- 



Chrysocoma graveolens Nutt. Gen. 2: 136. 1818. 



Bigelovia gravolens A. Gray, Proc. Am. Acad. 8: 645. 1873. 



Chrysothamnus speciosus Nutt. Trans. Am. Phil. Soc. 7: 323. 1840. 



Type locality: "On the banks of the Missouri in denudated soils." 



Range : British Columbia to Dakota, south to California and New Mexico. 



Specimens examined: North Yakima, Henderson, October 5, 1892; Watt, August, 1895; 

 Wenache, Whited 1327; Rattlesnake Mountains, Cotton 481; White Bluffs, Dunn, Septem- 

 ber 13, 1902; Egbert Springs, Sandberg & Leiberg 344; Chelan, Elmer 851; Coulee Cily, 

 Lake cfc Hull 733; Spokane, Sandberg, McDougal, ck Heller 913. 



Zonal distribution: Upper Sonoran. 



4. Chrysothamnus bloomeri Greene, Erythea 3: 115. 1895. 



Aplopappus bloomeri A. Gray,' Proc. Am. Acad. 6: 541. 1865. 



Type locality: "Mount Davidson, Nevada." 



Range: Washington to California and Nevada. 



Specimens examined: Mount Adams, Suksdorf 190; Yakima Region, Brandegee 843; 

 Simcoe Mountains, Howell in 1880; Big Klickitat River Cotton 1490; without locality, 

 Vasey in 1889; Mitchell Creek, Okanogan County, Gorman 835 (erroneously referred to 

 Aplopapjnis watsoni); Mount Ad&ms, Henderson d; Flett 1068; Falcon Y &Wey, Suksdarf, 

 October 3, 1881. 



Zonal distribution : Arid Transition. 



ERICAMERIA. 



1. Ericameria nana Nutt. Trans. Am. Phil. Soc. 7: 319. 1840. 



Ericameria resinosa Nutt. loc. cit. 



Aplopappus nanus D. C. Eaton in Wats. Bot. King Explor. 159. 1871. 



Type locality: "On shelving rocks on the Blue Mountains of Oregon." Collected by 

 Nuttall. 



Range: Washington to Idaho and Nevada. 



Specimens examined: West Klickitat County, Suksdorf 338; mountains north of 

 Ellensburg, Whited 862; North Yakima, Mrs. Steinweg in 1894; Yakima Region, Bran- 

 degee 845; Chelan, Elmer 855; Alkali Lake, Sandberg & Leiberg 418; cliflFs at the mouth of 

 the Tukanon, Piper. 



Zonal distribution: Arid Transition and Upper Sonoran. 



HOOREBEKIA. 



Bracts of the involucre rigid. 



Rays inconspicuous or wanting; leaves coriaceous or nearly so. 



Heads large, solitary or few, discoid 1.7/. carthamoides. 



Heads middle-sized, racemose; rays small 2. H. racemosa. 



Rays conspicuous. 



Leaves membranaceous, serrate, hirsute or villous 3. JEf. hirta. 



Leaves coriaceous, entire, glabrous A. H. haUii. 



Bracts of the involucre not rigid; leaves entire. 

 Plants herbaceous, low. 



Involucre glandular; stems leafy 5. H. lyallii. 



Involucre woolly ; stems naked or nearly so 6. 77. lanuginosa. 



Plants shrubby, at least at base. 



Leaves linear, very narrow, scabrous 1. H. stenophylla. 



Leaves lanceolate or oblong-spatulate, puberulent S. H. greenei. 



1. Hoorebekia carthamoides (Hook.) 

 Pyrrocoma carthamoides Hook. Fl. Bor. Am. 1: 307. pi. 107. 1833. 

 Aplopappus carthamoides A. Gray, Proc. Acad. Pliila. 1863: 65. 1863. 



