I02 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



smaller leaves and lighter flowers. It is often associated with D. 

 densifolia and its distinctness is readily seen. It is the most common 

 of the four species usually included in D. glacialis. 



Montana: Little Belt Pass, 1896, Flodman, 4^8; Madison Co., 

 1888, jp. Tweedy, 114, in part; Helena, 1889, I^. D. Kelsey ; 

 Bridger Mts., June 12 and 14, Rydberg & Bessey, 4180, 4182, 

 41 8 J and^/(?^,- Deer Lodge, 1892, W. T. Shazv (P); Silver Bow 

 Co., Mrs. Moore (F). 



Yellowstone Park : 1884, Tzi-eedy, 20J. 

 * Draba andina (Xutt.) A. Nelson, Bull. Torr. Bot. Club, 26: 352; 



Draba oligospcnna andina Nutt. : Torr. & Grav, Fl. N. Am. i : 



104. 



Like the preceding, but more denseW pulvinate-cespitose, the 

 flowering stems and leaves shorter and the larger flowers yellow. 

 In habit it more resembles D. densifolia, but the leaves are less 

 rigid and not so strongly ribbed, and the pod is that of D. oligospcnna. 

 On exposed alpine peaks, at an altitude of about 3000 m. 



Montana : Bridger Mountains, June 15, 1897, Rydberg & Bessey, 

 417s, 41 7g and 418 1 ; Mt. Chauvet, July 29, 4176 and 4177 ; Old 

 Hollowtop, Pony, July 9, 4178; Lima, 1895, Rydberg, 2668; 

 Madison Co., 1888, Tweedy, 114, in part, and 11 j. 



Yellowstone Park: 1873, Parry, 16. 

 (?) Draba incana L. Sp. PL 2 : 643 [Syn. Fl. i^ iii ; Man. R. M. 



17; 111. Fl. 2: 142]. 



In the only specimens seen from Montana the pod is elongated, 

 tapering upward, tipped with a short style and hairy. In all other 

 respects it resembles the typical form. 



Montana : Upper Sand Coulee, R. S. Williams, 806. 

 Draba aurea Vahl ; Ilornem. Tors. Oec. Plantel, Ed. 2, 599 [Syn. 



Fl. i': no; Man. R. M. 18; 111. Fl. 2: 143]. 



Dry hills in the mountain regions, at an altitude of 2000-2500 m. 



Montana: Melrose, 1895, Rydberg, 2670; Spanish Basin, July 

 28, 1897, Rydberg & Bessey, 41^3; Belt Mountains, 1885, R. W. 

 Anderson; Upper Marias Pass, 1883, Canby, 31. 



Yellowstone Park: Soda Butte Creek, 1885, Tzcecdy, j6g. 



* Draba crassa. 

 Draba chrysantha Wats. Proc. Am. Acad. 17: 364, in part. 



Perennial, with a short erect rootstock and several ascending or 

 decumbent stems, 5-15 cm. high, sparingly pubescent with short 



