394 CARDUACEAE. 



Peak ; near Pagosa Peak ; Ruby ; mountains above Ouray ; Berthoud Pass ; 

 headwaters of Clear Creek. 



6. Senecio pagosanus Heller. (S. lactucinits Greene of 1900-; not of 1893) 

 In the mountains of Colo. Alt. 10,000-12,000 ft Little Kate Mine, La Plata 

 Mountains; near Pagosa Peak; mountains above Ouray; Mt. Harvard. 



7. Senecio Holmii Greene. On alpine peaks of Colo. Alt. 10,000-14,000 ft. 

 Ragged Mountain ; Keblar Pass ; Mt. Princeton ; near Pagosa Peak ; Mt. 

 Harvard ; Cameron Pass ; mountains above Boreas. 



8. Senecio taraxacoides (A. Gray) Greene. (S. amplectens tara.vacoides A. 

 Gray) On alpine peaks of Colo. Alt. 10,000-13,000 ft. Cameron Pass ; Mt. 

 Garfield; Pike's Peak; Mt. Harvard; Bottomless Pit, near Pike's Peak; West 

 Spanish Peak; Gray's Peak. 



9. Senecio Soldanella A. Gray. On alpine peaks of Colo. Alt. 11,000-14,000 

 ft.- Mt. Princeton ; Cameron Pass ; Boreas ; Cumberland Mine, La Plata 

 Mountains ; mountains above Cameron Pass ; South Park. 



10. Senecio carthamoides Greene. (S. Frcmontii A. Gray, in part; not T. 

 & G.) In rocky wet places on alpine peaks of Colo, and Wyo.- Alt. 9000- 

 13,000 ft. Ragged Mountain; mountains of Estes Park; Gray's Peak; West 

 Spanish Peak ; Pike's Peak ; Silver Plume ; Mt. Harvard ; summit of Mt. 

 Garfield ; near Pagosa Peak ; Upper La Plata River ; Keblar Pass ; Berthoud 

 Pass; Chambers' Lake; headwaters of Clear Creek; Massif de 1'Arapahoe. 



11. Senecio blitoides Greene. (S. Fremontii A. Gray, in part; not T. & G.) 

 In wet rocky places on the higher mountains of Colo. Alt. 8000-15,000 ft. 

 Mountains above Ouray ; Crested Butte. 



12. Senecio invenustus Greene. On the higher peaks of Colo. Alt. about 

 12,000 ft. Near Pagosa Peak; Pike's Peak. 



13. Senecio triangularis Hook. In wet places, especially along mountain 

 streams, from Alb. and Alaska to Colo, and Calif. Alt. 8000-11,000 ft. 

 Mt. Harvard ; Ruby ; Upper La Plata River ; Steamboat Springs ; Cameron 

 Pass; headwaters of Pass Creek; Delta Co.; near Pagosa Peak; Mt. Ouray; 

 Marshall Pass; Red Mountain road, south of Ouray; between Sunshine and 

 Ward; Buffalo Pass; Berthoud Pass; Hematite; Gore Pass; Beaver Creek; 

 Michigan Creek ; Breckenridge ; headwaters of Clear Creek ; summit of North 

 Park Range. 



14. Senecio admirabilis Greene. In the mountains of Colo, and Wyo. 

 Alt. 7500-10,000 ft.- Twin Lakes ; Four-mile Hill, Routt Co. ; Trappers' Lake ; 

 Breckenridge; Box Canon, west of Ouray; Mt. Harvard; Keblar Pass; Mar- 

 shall Pass; Empire; Vance Junction. 



15. Senecio serra Hook. In valleys from Mont, and Wash, to Colo, and 

 Ore. Gunnison Co. ; Grizzly Creek. 



16. Senecio lapathifolium Greene. In the mountains of Colo. Alt. about 

 12,000 ft. Mountains above Ouray ; Mt. Harvard. 



17. Senecio crassulus A. Gray. In the mountains from Mont, and Ida. to 

 Colo, and Utah. Alt. 8000-13,000 ft. Silver Plume; Ward, Boulder Co.; 

 Trappers' Lake; Cameron Pass; mountains above Ouray; North Park; moun- 

 tain sides near Empire; Little Kate Mine and Cumberland Mine, La Plata 

 Mountains; near Pagosa Peak; Eldora to Baltimore; head of the Red River, 

 Franklin ; mountain northeast of Boreas ; Gray's Peak ; Boreas ; headwaters 



