184 Nelson Genus Hedysarum in Rocky Mountains. 



fact the descriptions do not tally very closely and Nuttall merely 

 suggests the possibility. The two habitats are so wholly different as to 

 suggest in themselves the distinctness of the plants. 



Hedysarum boreale Nutt. 



Hedysarum boreale Nutt. Gen. 2:110; and of many later authors in 

 part. See citations and the note on the preceding. 



When the proper locality shall have been visited, Nuttall 's subvillous 

 species with its obovate leaflets and round articulation in the loment 

 will probably be found again. 



Hedysarum cinerascens Rydb. 



Hedysarum cinerascens Rydb. Mem. N. Y. Bot. Gard. 1:257. 77. can- 

 escens Nutt. T. & G. Fl. N. Am. 1:358. 



This species is not of frequent occurrence, but is occasionally found in 

 typical form from central Wyoming, northward and westward. The 

 cinereous pubescence throughout, the small stipules and the short corolla- 

 wings are distinctive. 



Hedysarum lancifolium Rydb. 

 Hedysarum lancifolium Rydb. Mem. N. Y. Bot. Gard. 1 :256. 



No specimen of this is at hand, but judging by the description it is 

 an excellent species. Known only from the original locality, "Head 

 water of Jocko River, Mont., 1883, Canby, 93." 



Hedysarum marginatum Greene. 

 Hedysarum marginatum Greene, Pitt. 138. 1900. 



Of this species the description is not just now at hand but judging by 

 a specimen of the type number (Pagosa Springs, Colo., Baker, 1899) it 

 is strongly marked. Presumably that is still the only collection of it. 



Hedysarum Mackenzii Rich. 



Hedysarum Mackenzii Rich. Frankl. Jour. 745. 



. It is usual to call the commonest form of Hedysarum in the Rocky 

 Mountains by this name in spite of the fact that it does not at all closely 



