408 CICHORIACEAE. 



Involucres 1-1.5 cm. in diameter; plant tall and stout, scarcely glaucous. 



15. A. data. 

 Involucres less than i cm. in diameter ; plant slender, glaucous. 



2 J. A. arizonica. 

 Involucres of two distinct sets of bracts ; the inner narrowly linear, 2 to 3 

 times as long as the ovate or oval outer ones ; beak 3-4 times as long as 

 the body of the achenes. 22. A. rostrata. 



1. Agoseris pubescens Rydb. On hillsides of Wyo. and Colo. — Platte 

 Caiion ; Marshall Pass. 



2. Agoseris maculata Rydb. In the mountains of Colo. — Alt. 10,000-13,000 

 ft. — Silver Plume ; Tennessee Pass. 



3. Agoseris attenuata Rydb. In the mountains of Colo. — Alt. near 10,000 

 ft. — Mountains west of North Park. 



4. Agoseris pumila (Nutt.) Rydb. (Troximon pumilum Nutt.) On hills 

 from Mont, to Colo. — Alt. up to 12,300 ft. — Red Mountain; Silver Plume. 



5. Agoseris scorzoneraefolia (Schrad.) Greene. (Tro.rimon glaucum dasy- 

 cephalum T. & G.) On hillsides from Mont, and Alb. to Colo.— Alt. 4000- 

 8000 ft. — Divide road to Steamboat Springs ; Gunnison ; Four-mile Hill, Routt 

 Co. ; Marshall Pass ; Gypsum Creek Caiion. 



6. Agoseris agrestis Osterh. On hills of Colo. — Alt. 7000-12,000 ft. — Estes 

 Park, Larimer Co.; Ojo; butte, five miles southwest of La Veta; Berthoud 

 Pass. 



7. Agoseris Leontodon Rydb. On hills from Mont, and S. D. to Colo, and 

 Ariz. — Alt. 7000-10,000 ft. — Georgetown; Cripple Creek road, near Pike's 

 Peak; Van Boxle's ranch, above Cimarron; Marshall Pass; Gunnison; Four- 

 mile Hill; Walton Creek; Bear Creek. 



8. Agoseris roseata Rydb. On hills in Colo. — Bear River, twenty miles 

 below Steamboat Springs. 



g. Agoseris glauca (Pursh) Greene. (Tro.vimon glaucum Nutt.) On 

 prairies and in meadows from Sask. and Wash, to Colo, and Utah. — Alt. 

 4000-10,000 ft. — Pitkin ; near Teller, North Park ; Stove Prairie ; Bosworth's 

 ranch ; Ruxton Dell ; Wahatoya Creek ; Mancos ; inountains, Larimer Co. ; 

 swamp above Beaver Creek; Dolores; Elk River; Conejos River, north of 

 Antonito. 



ID. Agoseris parviflora (Nutt.) Dietr. {Troximon glucunt parviUorum A. 

 Gray) In meadows from N. D. and Alb. to Colo. — Alt. 4000-8000 ft. — 

 Chambers' Lake; Gunnison; Parlin; Steamboat Springs; Mt. Harvard; 

 Boulder. 



11. Agoseris rosea (Nutt.) Dietr. (Troximon roseum Nutt.) In valleys 

 of Colo. — Alt. about 8000 ft. — Ojo. 



12. Agoseris laciniata (Nutt.) Greene. (Stylosaiifhus laciniatus Nutt.; not 

 Troximon laciniatum A. Gray) In meadows and valleys from Wyo. and 

 Ida. to Colo, and Calif. — Alt. 5000-9500 ft. — Minturn, Eagle Co. ; Cerro Sum- 

 mit; Los Pinos; Durango; Seven Lakes, near Pike's Peak; Grayback mining 

 camps; river bluffs north of La Veta; butte, five miles southwest of La Veta; 

 headwaters of Sangre de Cristo Creek; Boulder. 



13. Agoseris montana Osterh. In the mountains of Colo, and Wyo. — Alt. 

 9000-11,500 ft. — Mountains west of North Park, along road to Steamboat 

 Springs; Buffalo Pass; mountainsides near Empire. 



14. Agoseris arachnoidea Rydb. In valleys of southern Colo. — Alt. 7000- 

 9500 ft. — Grayback mining camps ; La Veta. 



