426 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Yellowstone Park: Mammoth Hot Springs, 1884, Tz.-ecdyy 

 103. 



Dysodia papposa (Vent.) A. S. Hitchcock, Trans. St. Louis Acad. 

 5: 503 [111. Fl. 3: 453] ; Ta get cs papposa Vent. Hort. Cels. pi. 

 j6 ; Dysodia chfysatitheniotdes l^^.g. Gen. & Spec. Nov. 29 [Sjn. 

 Fl. i^: 356; Man. R. M. 197]. 

 In waste places. 

 Montana: Helena, 1891, F. D. Kclsey. 



Achillea lanulosa Nutt. Journ. Acad. Sci. Phila. 7 : 36 : Achillea 

 tomentosa Pursh, Fl. x\m. Sept. 563 ; not L. ; Achillea Mille- 

 folium Gray, S}^. Fl. i" : '^6'}^ [Man. R. M. 198 in part] ; not L. 

 This plant has been included in A. ATillefoliuin by American 

 authors but is evidently a good species, differing in the contracted 

 panicle, smaller heads, shorter segments of the leaves, and the lanate 

 pubescence. The true ^4. Millefolium is found in the Eastern United 

 States, and is apparently an introduced plant. Most specimens from 

 the Rocky Mountain Region belong to A. lanulosa and none to A. 

 Millefolium. There are about half a dozen species in North 

 America but only A. lanulosa is found in Montana. 

 It grows there at nearly all elevations. 



Montana: Helena, 1892, F. D. Kelscy ; Spanish Basin, 1896, 

 Flodman, 8Sc); Silver Bow Co., Mrs. Moore; Bridger Mountains, 

 June 17, 1897, Rvdberg & Bessev, 5196: Spanish Basin, June 23, 

 5ig7 ; Madison River, 1883, Scribner, 112b. 

 Yellowstone Park: 1885, Tzveedv, '/j2. 



Achillea lanulosa alpicola. 



Low, often less than i dm. high ; involucral bracts with a dark 

 brown or almost black marcrin. It grows at an altitude of about 

 3000 m. 



Montana: Electric Peak, 1897, Rydberg- <X: Bessev. 



Wyoming: Teton Forest Reserve, 1897, T-weedy, j 16 (type). 



Matricaria matricarioides (Less.) Porter, Mem. Torr. Bot. Club, 5: 

 341 [111. Fl. 3: 460] ; Artemisia matricarioides Less. Linnaea, 

 6: 210; Matricaria discoidca DC. Prod. 6: 50 [Syn. Fl. i" : 

 364; Man. R. M. 199; Bot. Cal. i: 401]. 

 Grows in sandy soil, waste places, old iields, etc., at an altitude 



of less than" 2000 m. 



