MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 1 73 



Lepidium apetalum Willd. Sp. PL 3 : 439 [Syn. Fl. i' : 127 ; 111. Fl. 



2 : 112] ; Lepidium intermedium Gray, Man. Ed. 2, 38 [Man. R. 



M. 26]. 



In loose soil, up to an altitude of 2000 m. 



Montana: Spanish Basin, June 24, 1897, Rydberg cf- Besscy^ 

 4140; Pony, July 6, 4141 ; Helena, /^. D. Kelsey ; Madison Co., 

 Mrs. McNulty; Custer Co., 1892, Mrs. Light. 



Thlaspi alpestre L. Sp. PI. Ed. 2,903 [Syn. Fl. i^ : 123; Man. R. 



M. 26; Bot. Cal. i: 45]. 



Among rocks in the subalpine region, at an altitude of 2500-3000 m. 



Montana: Beaver Head Co., 1888,/^. Tiueedy., 120; Spanish 

 Basin and Peaks, 1896, Flodman., jo8 and jog; June 28, 1897, 

 Rydberg & Bessey^ 4144; Bridger Mts., June 14 and 15, ^/^^ and 

 4143 ; Bozeman, 1892, Mrs. Alderson; Belts Mts., 1888, R. S. Wil- 

 liams^ 16 j; Bridger Mts., 1892, W. T. Shaiu ; Bozeman Pass, 

 1883, Scribner^ 8q; Ross' Hole, 1880, Watson. 



Yellowstone Park : Swan Lake, 1885, Tzveedy, j68. 



Schoenocrambe linifolia (Nutt.) Greene, Pittonia,3 : 127 ; Sisymbrium 

 linifolinm Nutt. ; Torr. & Gray, Fl. N. A. i : 91 ; [Syn. Fl. i^ : 

 138 ; Man. R. M. 23] ; Nasturtium linifolium Nutt. Journ. 

 Acad. Phila. 7: 12; Sisymbrium junceum Brewer & Wats. Bot. 

 Cal. I : 41 ; not Bieb. 



In establishing the genus. Professor Greene acknowledged three 

 species, which have generally been included in Sisymbrium lini- 

 folium. I have seen too little material to enter upon any discussion 

 regarding their validity as species. They are all found in Montana. 

 S. linifolius is a rather tall slender plant with linear leaves which 

 have entire margins, except the lower ones, which are sometimes den- 

 tate but not pinnatifid. 



Montana: Melrose, 1895, Rydberg, 26yi; Lewis «& Clarke Co., 

 Mrs. Muth; Bannock City, 1880, Watson. 



* Schoenocrambe pygmaea (Nutt.) Greene, Pittonia, 3: 128 ; Sisym- 

 brium pygmaeum Nutt. ; Torr. & Gray, Fl. N. A. i : 91. 

 A low plant about 2 dm. high, more branched, slightly hairy, and 



with the lower leaves pinnatifid. It grows in dry soil, at an altitude 



of about 2000 m. (?) 



Montana: Headwaters of Missouri, Wyeth; Sheridan, 1892, i^. 



M. Fitch; Helena, 1892, F. D. Kelsey. 



