364 CARDUACEAE. 



20. Erigeron concinnus ( H. & A.) T. & G. On arid plains and liills from 

 Mont, and B. C. to N. M. and Calif. — Alt. 4000-7000 ft. — Mancos ; Grand 

 Junction; Los Pinos (Bayfield); Durango; Dolores. 



21. Erigeron aphanactis (A. Gray) Greene. (£. concinnus aphanactis A. 

 Gray) On dry plains from Colo, and Nev. to Calif. — Antonito; Grand Junc- 

 tion. 



22. Erigeron simulans Greene. (E. Engclnianiiii arcnicola A. Nels.) On 

 dry hills and sandy flats from Mont, to Colo, and Utah. — Alt. 6000-8000 ft. — 

 Glcnwood Springs ; Cimarron ; Gunnison ; Salida ; Buena Vista. 



23. Erigeron Engelmannii A. Nels. On dry plains of Wyo. and Colo. — 

 Gunnison ; Gypsum ; Table Rock. 



24. Erigeron microlonchus Greene. On dry plains from Wyo. to Colo, and 

 Ariz. — Alt. about 7000 ft. — Cimarron. 



25. Erigeron elatior (A. Gray) Greene. {E. grandiflorum elatior A. Gray) 

 In wet places in the mountains of Wyo. and Colo. — Alt. 8000-12,000 ft. — Red 

 Mountain; Silver Plume; Mt. Baldy; near Pagosa Peak; east side of Bald 

 Mountain ; Georgetown ; Rabbit-Ear Pass ; White River Plateau ; Steamboat 

 Springs; near Teller, North Park; Ruby; Villa Park; Boreas; Leroux Park; 

 Rabbit-Ear Range, Routt Co.; near Empire; headwaters of Clear Creek; 

 Robinson; Red Mountain; Silver Plume; Berthoud Pass. 



26. Erigeron Coulteri Porter. In damp places in the mountains of Colo, 

 and Utah. — Alt. 9000-12,000 ft. — Lake City; Hinsdale Co.; Bard Valley, near 

 Empire ; Bob Creek, west of Mt. Hesperus ; Rabbit-Ear Pass ; La Plata 

 Canon; Leroux Creek, Delta Co.; East River; near Pagosa Peak; Red Moun- 

 tain, about Ouray; Tronton, San Juan Co.; Mt. Harvard; Ironton Park, nine 

 miles south of Ouray; Silverton; Berthoud Pass. 



27. Erigeron salsuginosus (Richardson) A. Gray. In wet ground from 

 Alb. and Alaska to Colo, and Calif. — Alt. 9000-12,000 ft. — Middle Park; 

 Chambers' Lake ; Georgetown ; near Pagosa Peak ; Minnehaha ; Lake Mo- 

 raine; Cameron Pass; Marshall Pass; mountains above Ouray; Hahn's Peak; 

 Mt. Harvard; Red Mountain; Ruby; Ruxton Park, Pike's Peak; Silver 

 Plume ; Beaver Creek ; Trappers' Lake ; Berthoud Pass ; Buflfalo Pass ; Gray's 

 Peak; between Como .and Boreas; Twin Lakes; Devil's Causeway; summit 

 of North Park Range, Larimer Co. ; Hahn's Peak. 



Erigeron salsuginosus glacialis (Nutt.) A. Gray. In the higher mountains 

 from Wyo. to N. M. and Utah. — Alt. 9000-12,000 ft. — High Mountains, near 

 Empire ; Caribou ; Veta Pass. 



28. Erigeron superbus Greene. In the mountains of Colo. — Alt. 7500-12,000 

 ft. — Mountains near Empire ; near Pagosa Peak ; Minnehaha ; Breckenridge ; 

 Villa Grove; Idaho Springs; Artist's Glen and Halfway House, Pike's Peak; 

 Box Canon, west of Ouray ; Baxter's ranch ; chaparral-covered hills southeast 

 of Ouray; mountains between Sunshine and Ward; Stove Prairie Hill; Mar- 

 shall Pass. 



29. Erigeron salicinus Rydb. In the mountains of Colo. — Alt. up to 10,000 

 ft. — Pagosa Springs ; Keblar Pass ; Narrows. 



30. Erigeron macranthus Nutt. In the mountains from Mont, and B. C. to 

 Colo., Utah and Ore. — Alt. 7000-10,000 ft. — Lake City; Platte River; west 

 of Ouray; Jack's Cabin; Steamboat Springs; Keblar Pass; Durango; Cerro 

 Summit; mountains, Larimer Co.; La Veta; La Plata Cafion; Mancos; Sun- 



