44^ MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Senecio nephrophyllus. 



Stem glabrous, about 4 dm. high, branched above, with erect 

 branches, striate ; first basal leaves reniform, thick, slightly wavy, 

 resembling those of Oxyria digyna; petioles 3-5 cm. long, the later 

 basal leaves rounded, oval, more or less cordate at the base, 

 sinuate ; stem-leaves pinnately sinuate-parted with oblong very 

 obtuse segments and rounded sinuses ; panicle with numerous small 

 heads on erect branches ; heads rayless, campanulate, 7—9 mm. high ; 

 bracts glabrous, linear, 5-6 mm. long, greenish yellow or brownish, 

 with light yellow margins ; rays none. 



A member of the ati?'eiis group, most easily distinguished by its 

 rayless heads and peculiar basal leaves. It grows in meadows. 



Montana: Big Blackfoot River, 1883, Canhx, 20J. 

 * Senecio pseudaureus Rydberg, Bull. Torr. Bot. Club, 24: 298. 



Nearly related to the eastern S. aureus and represents it in the 

 Rockies. Its basal leaves resemble somewhat those of that species, 

 but are smaller, narrower, less cordate at the base, and serrate in- 

 stead of crenate. Grows in wet meadows, at an altitude of 2000- 

 2500 m. 



Montana: Madison Co., Mrs. McXtiUy ; Bear Gulch, 1887, 

 Ttueedy,j4o; Columbia Falls, J/rs. Kennedy, g; Little Belt Mts., 

 1896, Flodman, gi8 ; Spanish Basin, June 28, 1897, Rydberg & 

 Bessey, 326J ; Indian Creek, July 21, s~^4' 



Yellowstone Park: Lone Star Geyser Basin, Aug. 7, 1887, 

 Rydberg & Bessey, J262. 



Senecio Balsamitae Muhl. ; Willd. Sp. PI. 1998 [111. Fl. 3: 479] ; 



Senecio aureus Balsamitae Torr. & Gray, Fl. N. Am. 2 : 442 



[Syn. Fl. i"': 381 ; Bot. Cal. i: 412; Man. R. M. 210]. 



In meadows, up to an altitude of 2500 m. 



Montana: Bozeman, j^(^6, Rlodnian, po8 ; Deer Lodge, 1895, 

 Rydberg, 28^0; Jack Creek, July 15, 1897, Rydberg d- Bessey, ^26 j. 



Senecio crocatus Rydberg, Bull. Torr. Bot. Club, 24: 299; Senecio 



aureus croceus Gray, Proc. Acad. Sci. Phila. 1863: 68 [Syn. Fl. 



I-: 391 ; Man. R. M. 311] ; not DC. 



In mountain meadows, at an altitude of 2000-2500 m. 



Montana: Anaconda, 1892, F. D. Kelsey ; Litde Belt Pass, 

 1896, Flodmau, gio; Bozeman, 1895, Rydberg, 28^1. 



Senecio cymbalarioides Nutt. Trans. Am. Phil. Soc. (II.) 7: 412; 

 Senecio aureus borealis Torr. & Gray, Fl. N. Am. 2: 442 [Syn. 

 Fl. i^: 391; Bot. Cal. i: 412; Man. R. M. 211]. 



