396 CARDUACEAE. 



31. Senecio Harbourii Rydb. Mountains of Colorado. — Alt. 9000-13,000 ft, 

 —Silver Plume ; mountains south of Ward, Boulder Co. ; mountains between 

 Sunshine and Ward; Boreas. 



32. Senecio plattensis Nutt. On prairies and in river valleys from western 

 Ont. and S. D. to Tex. and Colo. — Alt. 4000-7000 ft. — Cache la Poudre River; 

 Ft. Collins; New Windsor; Boulder; Horsetooth Gulch; Cimarron; Florence. 



33. Senecio salicinus Rydb. In the mountains of Colo. — Alt. 5000-6000 ft. 

 — Foot-hills, Larimer Co. ; Veta Pass ; Owl Cafion, Larimer Co. 



34. Senecio canovirens Rydb. In the mountains of Colo, and N. M. — Alt. 

 6000-10,000 ft. — Florence ; Williams Caiion ; Colorado Springs ; Manitou ; 

 Georgetown; Pike's Peak; Buckhorn Creek. 



35. Senecio rosulatus Rydb. On hills and mountains of Colo. — Alt. 5000- 

 13,000 ft. — Cameron Pass; Dillon Cafion; Trinidad; Pike's Peak; foot-hills 

 west of Ft. Collins ; Georgetown ; Chambers' Lake ; Gray's Peak ; Sangre de 

 Cristo Creek ; Manitou ; Grayback mining camps ; Artists' Glen, near Pike's 

 Peak ; Green Mountain Falls ; North Cheyenne Caiion ; mountain sides near 

 Georgetown ; Silver Plume ; New Windsor ; Marshall Pass ; Dark Caiion ; 

 Horsetooth Gulch; dry hills near Wood's ranch; near Narrows; Howe's 

 Gulch; Rist Cafion; Baxter's ranch; above Beaver Creek; Caribou; Cheyenne 

 Mountain; mountain sides near Golden; Bottomless Pit; Twin Lakes; Cafion 

 City; Empire; Boulder; between Sunshine and Ward. 



36. Senecio Fendleri A. Gray. On mountains from Colo, to Utah and N. M. 

 —Alt. 8000-13,000 ft— Manitou; Mt. Ouray; Bottomless Pit; Ojo; hills north 

 of Cascade ; mountains near Colorado Springs ; Grayback mining camps ; 

 Clear Creek; Hematite. 



37. Senecio lanatifolius Osterhout. (S. Fendleri lanatus Osterhout) In 

 the mountains of Colo. — Wolcott, Eagle Co. 



38. Senecio multilobatus T. & G. On dry plains of Colo, and Utah. — Alt. 

 about 7000 ft. — Dolores; Caiion of the Grand, above Palisades; Steamboat 

 Springs; Grand Junction; Mancos; Minturn. 



39. Senecio condensatus Greene. {S. aureus compactus A. Gray; 3". com- 

 pactus Rydb.) On dry plains and in sandy soil in Neb. and Colo. — Trinidad; 

 Table Rock; Colorado Springs. 



40. Senecio tridenticulatus Rydb. On dry plains from Colo, to Tex. — Alt. 

 7000-8000 ft.— Cottonwood Creek, Buena Vista; hills southeast of La Veta. 



41. Senecio oblanceolatus Rydb. On dry plains and hills from Wyo. to Tex. 

 —Alt. 4000-10,000 ft— Arboles; Los Pinos; Pike's Peak; Calhan; Como, 

 South Park; El Paso Co.; mesas near Colorado Springs; Cucharas Valley, 

 near La Veta; plains near Denver; Sangre de Cristo Creek; Turkey Creek 

 and tributaries; Cottonwood Creek, near Buena Vista; Quimby; hills about 

 Trinidad; Como; Clear Creek. 



42. Senecio longipetiolatus Rydb. In valleys of Wyo. and Colo.— Alt up 

 to 9000 ft. — Medicine Bow Range ; Hamor's Lake, north of Durango. 



43. Senecio crocatus Rydb. (3'. aureus croceus A. Gray; 6". dimorphophyl- 

 lus Greene; 6". heterodoxus Greene) On the higher mountains of Wyo. and 

 Colo.— Alt. 10,000-14,000 ft.— Pike's Peak Valley ; Mt. Harvard ; near Pagosa 

 Peak ; Cameron Pass ; summit of mountains west of North Park ; Little Kate 

 Mine, La Plata Mountains ; Alpine Tunnel ; South Cottonwood Gulch, Chafifee 

 Co. ; Long's Peak ; Red Mountain ; Berthoud Pass ; Grass Creek ; Red River ; 

 Beaver Creek; Gray's Peak; summit of North Park Range, Larimer Co. 



