364 CARDUACEAE. 



20. Erigeron concinnus (H. & A.) T. & G. On arid plains and hills 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. (£. Engelmannii arenicola A. Nels.) On 

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



Glenwood 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. grandMorum 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; fronton, 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; Buffalo 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 Caiion ; Mancos ; Sun- 



