558 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3. Chrysopsis hispida (Hook.) Nutt.; DC. Prod. 7: 279. 1S39. 



■Diplopapjms hispidus Hook. Fl. Bor. Am. 2: 22. 1834. 



Chrysopsis hirsuta Greene, Pittonia 3: 296. 1898. 



Type locality: "Carlton-House Fort." 



Range: Washington to Saskatchewan, south to Texas and Arizona. 



Specimens examined: Loon Lake, Winston, July 20, 1897; Spokane, Piper 2385; 

 Granddalles, Cotton 1550. 



Zonal distribution: Arid Transition and Upper Sonoran. 



CHRYSOTHAMNUS. Rabbit brush. 



Bracts of the involucre attenuate, acute 4. C. hlooinert. 



Bracts of the involucre obtuse or obtusish. 

 Stems glabrous. 



Heads few; plant 15 to 30 cm. high 1. C. jmmilus. 



Heads numerous; plant .5 to 2 m. high 2. C. v'lscidifiorvs . 



Stems more or less pubescent 3. C nauaeosas. 



1. Chrysothamnus pumilus Nutt. Trans. Am. Phil. Soc. 7: 323. 1840. 

 Bigeloria douglnsu piiinUa A. Gray, Syn. Fl. 1-: 140. 1884. 



Type locality: "On the border of Lewis River and the Rocky Mountain plains." Col- 

 lected by Nuttall. 



Range: Washington and Montana to Utah. 



Specimens examined: Yakima region, Bramlegce in 1882. 



2. Chrysothamnus viscidiflorus (Hook.) Nutt. Trans. Am. Phil. Soc. 7: 324. 1840. 

 Crinitaria viscidtfora Hook. Fl. Bor. Am. 2: 24. 1834. 



Bigelovia viscidiflora DC. Prod. 7: 279. 1838. 



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



Type locality: "On the barren plains of the Columbia from the Great Falls to the 

 mountains, and along Salmon River." Collected by Douglas. 



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



Specimens examined: Tampico, Henderson, July 31, 1892; Ellensburg, Whiied 855; 

 North Yakima, Henderson, October 5, 1892; Wenache, Whited 1328; Rattlesnake Moun- 

 tains, Cotton 481; Egbert Springs, Sandherg cfc Leiherg 382; Chelan, Elmer 852; Coulee 

 City, Lake cfc Htdl 732; without locality Vasey 509; mouth of Snake River, Cooper. 



Zonal distribution: Upper Sonoran. 



2a. Chrysothamnus viscidiflorus lanceolatus (Nutt.) Greene, Erythca 3: 95. 1895. 



Chrysothainnus lanceolatus Nutt. Trans. Am. Phil. Soc. 7: 324. 1840. 



Bigelovia douglasii lanceolata A. Gray, Syn. Fl. 1-: 140. 1884. 



Type locality: "Toward the source of the Platte and on the Ijaiiks of Lewis River." 

 Collected by Nuttall. 



Range: Washington lo Montana and Wyoming. 



Specimens examined: Tampico, Flett 1026. 



Zonal distribution: Upper Sonoran. 



3. Chrysothamnus nauseosus (Pall.) Britton in Britt. & Bi. 111. Fl. 3: 326. 1898. 

 Chrysocotna iiauseosa Pall.; Pursh, Fl. 2: 517. 1814. 



Chrysothamnus speciosus albicaulis Nutt. Trans. AnL Phil. Soc. 7: 324. 1840. 



Bigelmna graveolens albicaulis A. Gray, Proc. Am. Acad. 8: 645. 1873. 



Type locality: "On the banks of the Missouri." 



Range: Washington to Alberta, south to California and Wyoming. 



Specimens examined: Yakima Region, Cooper; Ellensburg, Whited 856; Uintanum 

 Creek, Cotton 895; Prosser, Cotton 897; Blue Mountains, Horner 327; Wawawai, Piper 1571; 

 Quillamene Creek, Cotton 1790. 



Zonal distribution: Upper Sonoran. 



