MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 403 



the petioles and the bracts, nor glandular-puberulent, except slightly 

 so on the upper part of the stem and the involucre. At an altitude 

 of nearly 3000 m. 



Montana: Cedar Mt., July i6, 1897, Rydbcrg & Bessey, ^opj. 



Erigeron ursinus Eaton. King's Exped. 5: 148 [Syn. Fl. i- : 211; 



Bot. Cal. I : 327 ; Man. R. M. 171]. 



On high mountains, at an altitude of nearly 3000 m. 



Montana: Park Co., 1887, Tzveedy, j6g; Yogo, 1888, R. S. 

 Williams, ySz. 



Yellowstone Park: Mt. Washburn, 1885, Tweedy, 70^; 1884, 

 121 ; C. C. Parrv, ij^. 



Idaho: Mt. Chauvet, July 29, 1897, Rydbe7'g & Bessey, \§ 102. 



Erigeron radicatus Hook. Fl. Bor. Am. 2: 17 [Syn. Fl. i^ : 211; 



Man. R. M. 171]. 



On top of the highest mountains, at an altitude of nearly 3000 m. 



Montana: Park Co., 1887, Tzueedy, jdy; Gallatin Co., 1886, 

 1 140; Spanish Basin, June 26, 1897, Rydberg & Bessev, ^084; 

 Indian Creek, July 22, 5086 ; Old Hollowtop, Pony, Jul}^ 9, 1897, 

 508J ; Head of Stillwater, 1897, P. Koch, 66; Spanish Peaks, 1896, 

 Flodman, 846. 



Yellowstone Park: Mt. Holmes, 1884, Txveedy, 121 ; Electric 

 Peak, Aug. 18, 1897, Rydberg d: Bessey, 308^. 



* Erigeron asperugineus Gray, Proc. Am. Acad. 16: 91 [Syn. Fl. 



I- : 212]. 



Like E. tener., but with larger heads, and broadly ovate or oval 

 slender-petioled basal leaves. It grows on high hills, at an altitude 

 of 2000 m. 



Montana: Melrose, 1895, Rydberg, 282J. 



* Erigeron Tweedyii Canby, Bot. Gaz. 13: 17. 



A near relative of R. asferugineus and E. tener, but it has much 

 broader leaves than the latter, and a liner pubescence and broader 

 bracts than the former. On alpine peaks, at an altitude of about 

 3000 m. 



Montana: Cinnabar, 1887, Tzveedy ; Beaver Head Co., li 

 17; Trail Creek, 1887, j<5o (type). 



Idaho : Mt. Chauvet, July 29, 1897, Rydberg & Bessey, 5082. 



