Rydberg : Rocky Mountain flora 49 



low, transversely reticulate, sparingly strigose ; upper suture prom- 

 inent. 



This species is related to X. anipJiioxys (A. Gray) Rydb., but 

 differs in the long subulate instead of triangular calyx-teeth, in the 

 banner much exceeding the wings, and in the narrower leaflets. 



Utah: St. George, 1880, M. E. Jones i6jj (type in herb. 

 Columbia Univ.) ; 1877, Dr. E. Palmer loi. 



Homalobus uniflorus 



Pulvinate-cespitose perennial with a much-branched caudex ; 

 stipules ovate, scarious, ciliate ; leaves reduced to oblanceolate or 

 linear-spatulate phyllodia, appre'ssed silky-canescent, 1—2 cm. 

 long, 1-3 mm. wide; peduncles 1-2 cm. long, usually i-flow- 

 ered ; calyx silky-canescent ; tube campanulate, 2 mm. long ; 

 teeth subulate, of about the same length ; corolla dark bluish- 

 purple, 8 mm. long. 



This species is closely related to H. siniplicifolins and H. 

 bracliycarpiis Nutt. From the former it differs in the dark bluish- 

 purple, not ochroleucous corolla ; the elongated peduncles, the 

 longer and broader leaves, and the comparatively longer calyx- 

 lobes ; from A. brachycarpiis it is distinguished by its solitary flow- 

 ers and darker corolla. 



Wyoming: Evanston, 1897, Aven Nelson 2gji (type in herb. 

 N. Y. Bot. Gard.). 



Homalobus campestris Nutt.; T. & G. Fl. N. Am. i : 351. 1838. 

 Astragalus campestris A. Gray, Proc. Am. Acad. 6 : 229, in part. 



1866. '^oi Astragalus campestris 'L. 1753. 

 Astragalus convallarius Greene, Erythea i : 207. 1893. 



There has been a confusion concerning the identity of this 

 species, evidently because Dr. Gray, when he transferred the 

 species to Astragalus, had in mind something entirely different 

 from Nuttall's Homalobus campestris. All the specimens of this 

 species (except the type and one more) in the herbaria of the New 

 York Botanical Garden and Columbia University have been referred 

 to H.junceus. H. campestris is also closely related to that species, 

 differing in the black-hairy calyx, the longer calyx-lobes, and the 

 pod, which tapers gradually to the base. The black-hairy calyx 

 and the shape of the pod it has in common with Homalobus junci- 

 formis (A. Nelson) Rydb., but it has longer calyx-teeth and nar- 

 rower and longer leaflets. In both El.junceus and H . junciformis 



