Rydberg : Studies on Rocky Mountain Flora 181 



Montana : Little Belt Mountains, 1896, Flodinan, giS (type); 

 Madison Co., Mrs. McNuIty ; Bear Gulch, 1887, /^ Tivecdy, j^o ; 

 Columbia Falls, Mrs. Kenned}', p ; Spanish Basin, 1897, Rvdbcrg 

 & Bcssty, J 26 J ; Indian Creek, 326^. 



Wyoming : Lone Star Geyser Basin, Yellowstone Park, 1897, 

 Rydberg & Bessey, J262. 



Colorado : Grizzley Creek, 1896, C. F. Baker ; Long's Peak, 

 1886, 6". IV. Letterman ; Mancos, 1898, Baker, Earle & Traey, 



45- 



New Mexico: Pecos River, 8 miles east of Glorietta, 1897, 

 A. A. & E. Gertrude Heller, 36S2. 



Utah: E. Humbolt Mts., 186S, 5. Watson, 667. 



17. Senecio platylobus sp. nov. 



^. aureus var. eroeeus D. C. Eaton, King's Exp. 5 : 190, in part. 



'187 1 ; not Gray. 1863. 



A stout, perfectly glabrous perennial : stem about 4 dm. high, 

 rather leafy, striate and somewhat angled : basal leaves 6—10 cm. 

 long, slender-petioled, obovate or broadly oval, sinuately crenate- 

 dentate, thin : lower stem leaves oblanceolate, petioled, deeply 

 lobed or divided with rounded lobes : upper stem leaves broadly 

 ovate in outline, sessile, pinnately divided into broadly oblong or 

 cuneate divisions which are more or less deeply sinuate-dentate : 

 cyme compound ; its branches corymbiform : heads about 8 mm. 

 high ; bracts broadly lanceolate, acute, membranous margined and 

 slightly shorter than the disk : rays 6—7 mm. long, and 3 mm. 

 ■wide, 5 -nerved : achenes striate, glabrous. 



Probably nearest related to the preceding, but easily distin- 

 guished by the form of the leaves and the broad rays. It grows 

 at an altitude of about 1500 m. [Plate 6, f 8.] 



Utah : Wasatch Mountains, 1869, J5. IVatson, 6/I (type in the 

 Torrey Herbarium). 



18. Senecio flavovirens sp. nov. 



^. Balsaniitae Rydberg, Mem. N. Y. Bot. Gard., i : 446, mainl}' ; 



1900 ; not Muhl. 1 804. 



Light or yellowish green, slender, perennial, in age glabrate or 

 slightly floccose at the base of the leaves : stem 3-4 dm. high, 

 striate, pale : basal leaves 3-8 cm. long, obovate or broadly oval, 

 generally tapering into the petioles, but sometimes truncate at the 

 bases, obtuse, crenate or sinuate, light green : lower stem leaves ob- 



