Rydberg : Rocky Mountain flora 419 



I^egume glabrous. 



Stipe rarely exceeding the tube of the calyx; leaves usually spreading in age; 



leaflets oblong to oval, obtuse and mucronate. H. Jispav. 



Stipe of the mature legume usually exceeding the calyx-teeth ; leaves strongly as- 

 cending ; leaflets narrowly linear to linear-oblong, mostly acute. 

 Stipe 3-4 mm. long ; leaflets linear or linear-oblong ; stem usually conspicu- 

 ously strigose ; calyx-teeth half as long as the tube. //. tenelhis. 

 Stipe 5-7 mm. long; leaflets narrowly linear; stem glabrous or nearly so; 

 calyx-teeth usually nearly equaling the tul)e. H. stipilaiiis. 

 Legume strigose. //. s/rignlosus. 



HoMALOBUs DisPAR Nutt.; T. & G. Fl. N. Am. i : 350. 1838. 

 Orobns dispar '^uit. Gen. 2 : 95. 18 18. 



This is much less common and has a more restricted range 

 than //. tencUns. The range of H. dispar includes the extreme 

 western portion of Nebraska, Wyoming, northern Colorado and 

 northeastern Utah, while that of //. ttiicllus extends from Sas- 

 katchewan to Nebraska, Colorado, Utah, and the Yukon Territory. 



Homalobus stipitatus sp. nov. 



Somewhat cespitose perennial ; stems slender, 3-4 dm. high, 

 erect, branched, sparingly strigose or glabrate, leafy ; leaves 

 strongly ascending, 4-6 cm. long ; stipules lance-subulate ; leaflets 

 9-15, narrowly linear, 1-2 cm. long, 1-2.5 '^"""^i- wide, glabrous or 

 sparingly strigose beneath ; peduncles about I cm. long ; racemes 

 lax, 2-10 cm. long, 5-20-flowered ; calyx strigose; tube cam- 

 panulate, about 1.5 mm. long ; teeth subulate, about as long; corolla 

 ochroleucous, 8— lO mm. long; legume glabrous, stipitate, flat; 

 body oblong, about i cm. long, 3 mm. wide, acute, gradually 

 tapering into the stipe, which is 5-7 mm. long. 



This species is related to H. toicllus (Pursh) Britton \_Astra- 

 galiis multiflonis (Pursh) A. Gray], but is a more slender and more 

 glabrate plant, with narrower leaflets and longer stipe. It 

 belongs to the prairie region east of the range occupied by H. 

 tcncllus. 



North Dakota: "Upper Missouri" [from the data given in 

 Nicollet's report, on the hills somewhere between Fort Pierre and 

 Devil's Lake], 1839, 6^o'^v- (type in herb. Columbia University); 

 Valley City, 1897, L. L. Pcrri/ic. 



Minnesota: Lake Belmont, Otter Tail Co., 1892, E. P. 

 Sheldon. 



Saskatchewan: 1858, E. Boitrgeau ^. 



