408 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Erigeron debilis (Gray); En'geron acris debilis Gray, Syn. Fl. i^ : 



220 [Man. R. M. 174]. 



Evidently perfectly distinct from the European E. acrls L. It 

 grows among rockslides, at an altitude of 2000-3000 m. 



Montana: Spanish Basin, June 28, 1897, Rydberg & Bessey, 

 3074; Electric Peak, Aug. 18, joyj ; Madison Valley, 1872, 

 J. M. Coulter; McDonald's Peak, 1883, Canhy, 186; Upper 

 Marias Pass, ijg; Long Baldy, Little Belt Mountains, 1896, Flod- 

 man, 84J. 



Leptilon Canadensis (L.) Britton, 111. Fl. 3: 391; En'grron Catia- 



densis L. Sp. PL 863 [Syn. Fl. i" : 221 ; Bot. Cal. i : 331 ; Man. 



R. M. 174]. 



In waste places, up to an altitude of 1500 m. 



Montana: Great Falls, 1886, R. S. Williams, 423; Fridley, 

 Aug. 22, 1897, Rydberg & Bessey, joyi ; Smith River, 1883, Scrib- 

 ner,gS; Bitter Root Valley, 1888, iVatson. 



Filago prolifera (Xutt.) Britton, Mem. Torr. Bot. Club, 5: 329 

 [111. Fl. 3 : 395] ; Evax frolifera Nutt. ; DC. Prod. 5 : 459 [Syn. 

 Fl. i^ 229; Man. R. M. 175]. 

 Dry barren hills, at an altitude of 1000 m. 

 Montana: Lower Sand Coulee, 1891, R. S. Williams, JS4. 



Antennaria dimorpha (Nutt.) Torr. & Gray, Fl. N. Am. 2: 431 



[111. Fl. 3: 400: Syn. Fl. i' : 231 ; Bot. Cal. i: 339; Man. R. 



M. 176] ; Gnapkaliiim dimorphum Nutt. Trans. Am. Phil. Soc. 



(II.) 7: 405. 



Dry hills, up to an altitude of 2500 m. 



Montana: Hell Gate, John Pearsall, 8j6; Gallatin Co., 1888, 

 Tweedy, 2ig; Helena, 1886, R. S. Williams, jj2; Livingston, 

 1883, Scribner, loi. 



Yellowstone Park: 1873, C. C. Parry, iy2. 



♦Antennaria flagellaris Gray, Proc. Am. iVcad. 17: 212 [Syn. Fl. 



I': 231] ; Antennaria dimorpha flagellaris Torr. & Gray, U. S. 



Exped. 17: -^66. 



Belongs to the same group as A. dimorpha, but has smaller 

 heads, narrower leaves, and flagelliform stolons. At an altitude of 

 about 2800 m. 



Yellowstone Park: Mt. Norris, 1885, Tweedy, y2g. 



