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 Canon, Larimer Co. 



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

 6000-10,000 ft. Florence; Williams Canon; 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 Canon; 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 Canon ; mountain sides near 

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

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

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

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

 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 ; Canon of the Grand, above Palisades ; Steamboat 

 Springs ; Grand Junction ; Mancos ; Minturn. 



39. Senecio condensatus Greene. (S. aureus compactus A. Gray; 5". com- 

 pact us 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. (S. aureus croceus A. Gray; 5". dimorphophyl- 

 lus Greene; 5". 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, Chaffee 

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

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



