342 CARDUACEAE. 



3. Chrysothamnus Bigelovii (A. Gray) Greene. (Bigelovia Bigelovii A. 

 Gray) On dry plains from Colo, and Utah to Tex. and N. M. Alt. about 

 7000 ft. Huerfano Co. ; mesas, La Veta ; Buena Vista. 



4. Chrysothamnus Parryi (A. Gray) Greene. (Bigelovia Parryi A. Gray) 

 On hills and in dry valleys from Wyo. to Colo. Alt. 7500-10,000 ft. Gray's 

 Peak; Georgetown; South Park; near Empire; Lake City; southeast of 

 Ouray; North Fork; Pitkin; mesa, Yampa; Parlin; Cottonwood Lake; Twin 

 Lakes; Steamboat Springs; Marshall Pass; Cerro Summit; Cumbres; Mt. 

 Harvard; on Grizzly Creek; near Empire; Middle Park; Black Canon of the 

 Gunnison; Little Muddy, Gunnison Co.; Breckenridge; Hayden. 



5. Chrysothamnus Newberryi Rydb. On dry hills of N. M. and Colo. 

 Mesa Verde. 



6. Chrysothamnus Howard! (Parry) Greene. (Bigelovia Howardii A. 

 Gray) On dry hills from Neb. and Wyo. to Colo. Middle Park; Greene, 

 North Park; near Walden. 



7. Chrysothamnus Greenei (A. Gray) Greene. (Bigelovia Greenei A. Gray; 

 C. scoparius Rydb.) On plains of Colo. Alt. 5000-7500 ft. Huerfano Co.; 

 La Veta; Hugo. 



8. Chrysothamnus filifolius Rydb. On plains of Colo. Antonito; Granite. 



9. Chrysothamnus collinus Greene. On hills of Wyo. and Colo. West- 

 cliffe. 



10. Chrysothamnus wyomingensis A. Nelson. On dry plains of Wyo. and 

 Colo. South Park at Jefferson. 



11. Chrysothamnus virens Greene. Plains of southern Colo. Pike's Peak; 

 Canon City. 



12. Chrysothamnus graveolens (Nutt.) Greene. (Bigelovia graveolens A. 

 Gray) In canons, on "bad-lands," and dry hills from Neb. and Mont, to 

 N. M. and Utah. Alt. 4000-8000 ft. New Windsor; Golden; Grand Junc- 

 tion; near Denver; Grizzly Creek; Canon City; Idaho Springs; Egeria Park; 

 Breckenridge; Ft. Collins; Boulder; Delta; Jefferson Co. 



13. Chrysothamnus patens Rydb. On dry plains and hills in Colo. Alt. 

 4600-7500 ft. Grand Junction; Alamosa; Manitou; lola. 



14. Chrysothamnus pinifolius Greene. On dry hills and plains in Colo. 

 Alt. 7000-13,000 ft. Gunnison; Doyles; Mt. Abram. 



15. Chrysothamnus confinis Greene. On arid plains of Colo, and N. M. 

 Alt. 4000-8000 ft. Grizzly Creek; Huerfano Valley, near Gardner. 



1 6. Chrysothamnus plattensis Greene. On plains of Wyo. and Colo. Alt. 

 4000-5000 ft. Denver; New Windsor; near Hebron; Ft Collins. 



17. Chrysothamnus pulcherrimus A. Nels. On plains from Mont, to Colo. 

 North Park; Pagosa Springs; near Hebron; Grand River, near State 

 Bridge ; Trimble Springs ; Poudre Canon ; forks of Poudre and Big South ; 

 Gypsum. 



1 8. Chrysothamnus frigidus Greene. On plains from Ass. to Colo. Alt. 

 8000 ft. Buena Vista. 



19. Chrysothamnus elegans Greene. On plains of Colo. Alt. 7500-8500 

 ft. Gunnison; Doyles; South Park. 



20. Chrysothamnus linifolius Greene. On dry plains of Wyo. and Colo. 

 Alt. 4000-5000 ft. Deer Run; Grand Junction; Hotchkiss, Delta Co.; Olathe. 



