Rydberg: Notes on Fabaceae — I 187 



Yukon: Ranch Valley, Gorman 1082; White Horse, Macoun 

 58429. 



When I transferred Astragalus debilis {Phaca debilis Nutt.) 

 to Homalobus, I thought that the specimens above cited be- 

 longed to it and drew the characters of the pod from them. I 

 have since found that they represent a species close to H. 

 Bourgovii. M. E. Jones identifies Phaca debilis, with Astragalus 

 Bodini Sheld., which is a true Phaca related to P. microcystis. 

 A duplicate of the type of P. debilis, which is in the Torrey 

 Herbarium, somewhat resembles P. Bodini in habit, but the 

 calyx is not black-hairy and the leaflets are emarginate. Mac- 

 bride admits Astragalus debilis as a member of the subgenus 

 Homalobus, citing the following two species from Colorado: 

 North Park, Osterhout 3, and Upper Platte, Geyer j. The 

 latter I have not seen but Osterhout 's plant clearly belongs 

 to P. Bodini. Osterhout had labelled it "Astragalus debilis," 

 apparently following Jones's interpretation. Until the fruit 

 is discovered, I fear that P. debilis can not be fully interpreted. 



Astragalus grallator S. Wats, is regarded by M. E. Jones as 

 an abnormal form of A. Haydenianus, and I am inclined to 

 agree to this view. In this case the species should be removed 

 from Homalobus. The specimen of A. grallator in the Torrey 

 Herbarium, so named by Watson, is a similar abnormal form 

 of some other species. 



