INIEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 257 



In the size and color of the flowers it resembles H. Mackcnzii, but 

 it has the short calyx-teeth of H. Aincricaiiwn, although they are 

 more slender. The general habit is that of the latter but the leaflets 

 are longer and more decidedly lanceolate. The joints of the fruit 

 are almost twice as long as in II. Americaimin and with an evident 

 wing-margin. In mountain woods. 



Montana: Headwater of Jocko River, 1883, Canhy, gj. 



Hedysarum sulphurescens Rydb. Bull. Torr. Bot. Club, 24 : 253; 



Hcdysariiin favcsccns Coulter & Fisher, Bot. Gaz. 18 : 300 ; not 



Regel & Schm. 



Like //. Americamtni^ but with sulphur-yellow flowers. On moun- 

 tain sides, at an altitude of 2000-3000 m. 



Montana: Little Rocky Mts., 1889, Dr. V. Havard; Beaver 

 Head Co., 1888, F. Tzveedy, 21J ; Bozeman, 1895, Rydberg, 2J20; 

 Spanish Basin, 1896, Flodman, 6jo; Bridger Mts., 6ji ; Jack 

 Creek Caiion, July 15, 1897, Rydbcrg & Besscy, 4308 ; Electric Peak, 

 Aug. 18, 4507 ; Bear Creek, 1887, Tzaccdy, iiy ; Tiger Butte, 1887, 

 R. S. Williains, g2 ; Upper Marias Pass, 1883, Canby, gj ; Cut Bank 

 Creek, gj ; Sixteen Mile Creek, 1883, Scribner, ji. 



Yellowstone Park; Mt. Holmes, 1884, Tzvecdy, 72; Slough 

 Creek, 1885, SS^^- 



Hedysarum Mackenzii Richards. Frankl. Journ. 745 [Man. R. 



M. 72; 111. Fl. 2: 311]. 



On mountain sides, at an altitude of 2000-2500 m. 



Montana: Jack Creek, July 19, 1897, Rydbcrg d- Bcssey, 4Sog; 

 Beaver Head Co., 1888, Tit'cedy, 214.; Billings, 1882, Canby; Six- 

 teen Mile Creek, 1883, Scribner, j2. 



Yellowstone Park : Mammoth Hot Springs, 1884, Tzucedy, 

 yj ; Soda Butte Creek, 1885, Tweedy, 55/. 



* Hedysarum cinerascens ; Hedysarum canescens Nutt. ; Torr. & 



Gray, Fl. N. Am. i: 357, 1838; not L. 1753. 



Like the last, but minutely canescent and generally with narrower 

 leaves. At an altitude of 1000-2500 m. 



Montana: Lima, 1895, Rydberg, 2721; Park Co., 1889, 

 Tweedy; Trail Creek, 1887, n^; Belt Canon, 1887, R. S. Wil- 

 liams, gi. 



Yellowstone Park : Soda Butte, 1885, Tweedy, ^^i. 



