268 Rydberg: Notes on Fabaceae — II 



Wyoming: Woods Creek, Goodding 1429. 



35. Homalobus hylophilus Rydb. This is the most common 

 species of the group in the Northern Rockies, extending as far 

 south as northern Utah and the Black Hills, but not being found 

 in Colorado. Jones* claims that this is a shade form of A. de- 

 cumbens convallarius , due mainly to his misinterpretation of 

 A. convallarius , which latter was based on Homalobus campestris 

 Nutt. 



36. Homalobus Palliseri (A. Gray) Rydb. Macbride re- 

 duced this to a variety, A. serotinus Palliseri (Gray) Macbride. 

 It is more closely related to H. hylophilus, having the same 

 glabrous pod, but the leaflets are much narrower and the calyx- 

 lobes shorter. There are, however, specimens of H. hylophilus 

 which have nearly as narrow leaflets as those of H. Palliseri. 

 The Montana specimens of H. Palliseri have longer pods and 

 in that respect approach H. hylophilus. 



Alberta: Rocky Mountains, Bourgeau; headwaters of the 

 Saskatchewan, S. Brown 923; Banff, 5. Brown 80; VanBrunt 6; 

 Canby 41; Barber 105, 279. 



British Columbia: Carbonate, Shaw 227, 241; Green, 3210; 

 Kettle River, /. M. Macoun 63152, 63756; Lake Osoyoos, 70440; 

 Canmore, /. Macoun 15; Maligne River, Spreadborough 19310; 

 Armstrong, E. Nelson 133. 



Washington: Concomilli, Griffiths & Cotton 319; Ophir, 

 Elmer 528; Walla Walla, Brandegee. 



Montana: Spanish Basin, Flodman 636; Bozeman, Wilcox 

 115; Old Hollowtop, Rydberg & Bessey 4489; Bridger Mountains, 

 4494; Old Sentinal, MacDougal 168, 172; Terminus, Watson 88. 



37. Homalobus detritalis (M. E. Jones) Rydb. This has 

 been placed in the present group but probably does not belong 

 here. In general habit it resembles the Simplicifolii, but the 

 leaves have five leaflets. Whether it has the acute keel-petals 

 characteristic of the. Cam pestres or not I do not know, as I did 

 not look for that character when I saw the type some years ago. 



E. Stenophylli 



Pod glabrous, except the stipe. 

 Leaflets narrowly linear. 



Contr. West. Bot. 10: 69. 1902. 



