CARDUACEAE. 387 



zie and Alaska to Colo. — Alt. about 8000 ft. — Red Mountain, south of Ouray. 



30. Artemisia incompta Nutt. Hillsides from Mont, to northern Colo. — 

 Anita Peak. 



31. Artemisia discolor Dougl. In the mountains from Alb. and B. C. to 

 Colo., Utah and Wash. — Lake City. 



32. Artemisia Bigelovii A. Gray. On dry plains from Colo, to Tex. and 

 Ariz. — Arkansas River. 



33. Artemisia tripartita Rydb. (A. trifida Nutt.) On plains and hills 

 from Mont, and Wash, to Colo, and Ore. — Exact locality not given. 



34. Artemisia tridentata Nutt. On dry plains (sage plains) from Neb., 

 Mont, and B. C. to Colo, and Calif. — Alt. 4000-9500 ft. — Grand River, Sheeps- 

 horn road; Grand River, near State Bridge; Montrose; Pitkin; Gunnison; 

 Steamboat Springs; near Empire; Upper Laramie River; Cimarron; Durango; 

 Sangre de Cristo Creek; Hotchkiss ; Breckenridge. 



35. Artemisia arbuscula Nutt. On dry mountains and high plains from 

 Wyo. and Ore. to Colo, and Calif. — Hayden flats, Routt Co. 



36. Artemisia nova A. Nels. On high plains of Colo, and Wyo. — Alt. about 

 7700 ft. — Gunnison. 



37. Artemisia spiciformis Osterh. On dry plains of Colo, and Utah. — Alt. 

 about 9000 ft.— West side of North Park; Crested Butte. 



38. Artemisia cana Pursh. On dry plains and hills from Sask. and Mont. 

 to Colo. — Alt. 4000-10,000 ft. — Breckenridge ; Marshall Pass ; west of Hebron ; 

 Hayden flats, Routt Co. ; Timnath. 



39. Artemisia viscidula (Osterh.) Rydb. (A. cana viscidula Osterh.) On 

 dry plains of Wyo. and Colo.- — Steamboat Springs. 



Tribe 7. SENECIONEAE. 



83. PETASITES Tourn. Sweet Coltsfoot. 



I. Petasites sagittata (Pursh) A. Gray. In wet ground from Lab. and 

 Alaska to Minn, and Colo. — Alt. 8000-10,000 ft.- — Eldora to Baltimore; George- 

 town. 



84. HAPLOESTES A. Gray. 



I. Haploestes Greggii A. Gray. On dry plains from Kans. and Colo, to 

 Tex. and N. M. — Southeastern Colorado; exact locality not given. 



85. ARNICA L. 



Heads radiate. 



Basal leaves and lower stem-leaves with cordate or broadly ovate blades and 

 slender petioles. 

 Achenes glabrous or glandular puberulent ; rarely with a few silky hairs above. 



1. A. platyphylla. 

 Achenes densely hirsute or strigose. 



Blades of the leaves broadly oval ; the basal ones with short petioles. 



2. A. silvatica. 

 Basal and lower stem-leaves with long petioles and usually cordate bases ; 



involucres and peduncles more or less villous, slightly glandular. 

 Plant 1-2 dm. high ; leaves thick, usually entire. 3. A. pumila. 



Plant 2-4 dm. high ; leaves thin, usually toothed. 4. A. cordifolia. 

 Basal leaves with spatulate, oblanceolate or lanceolate blades. 



