408 CICHORIACEAE. 



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



15. A. elata. 



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



21. 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 

 Canon; 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. (Troximon 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 Canon. 



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. 



9. Agoseris glauca (Pursh) Greene. (Troximon 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 ; mountains, Larimer Co. ; 

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

 Antonito. 



10. Agoseris parviflora (Nutt.) Dietr. (Troximon glucum parvifiorum 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. (Stylosanthus 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. 



