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 Vela; Buena Vista. 



4. Chrysothamnus Parryi (A. Gray) Greene. (Bigelovia I'arryi 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 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 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; Caiion 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. — xA.lt. 

 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. 



