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 Howardi (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 coUinus 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 caiions, 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. 



16. 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. 



18. Chrysothamnus frigidus Greene. On plains from Ass. to Colo.— Alt. 

 8000 ft. — Buena Vista. 



ig. 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. 



