156 CALIFORNIA ACADEMY OF SCIENCES. 



Mountains of the northern part of Arizona, 1883, Dr. H. 

 H. Rusby. 



A quite peculiar species in respect to the curvature of the 

 pod, the direction of which is the reverse of that of other 

 species. 



A. albens. White throughout with a short, appressed, 

 silky pubescence : branches spreading, less than a foot long, 

 from a perennial root : leaflets in about four pairs, obovate , 

 obtuse, 3 — 5 lines long: raceme few-flowered: pedicels very 

 short: calyx-teeth subulate, equaling the tube: corolla 4 

 lines long, purple: pod oblong, slightly compressed, falcate- 

 incurved, silky pubescent. 



Mohave Desert, May, 1882, S. B. and W. F. Parish, No. 

 1274. 



Perhaps nearest A. Cobrensis, but that is a green and 

 glabrous, considerably smaller plant with straight pods. 



A. candicans. Near A. 3£issouriensis but smaller, white- 

 silky, the pubescence closely appressed: caudex branching: 

 leaflets obovate or oblong a half inch long, in about four 

 approximate pairs: peduncles scape-like, erect, a span high: 

 raceme subcapitate, 8 — 10-flowered: corolla a half inch 

 long, red purple: calyx- teeth triangular-lanceolate, two- 

 thirds as long as the campanulate tube: pod narrowly ob- 

 long, a half inch long, straight, nearly cylindrical, sulcate 

 below, completely two-celled, white silky. 



Northern Arizona, 1883, Dr. H. H. Rusby. 



A. Layne.e. Soft-villous throughout: sub-caulescent, 

 less than a foot high, rather stout: leaflets in 9 — 11 pairs, 

 obovate, obtuse, a half inch long: peduncles stout, 8 — 10 

 inches long: raceme loose: corolla not seen : calyx-teeth tri- 

 angular-subulate, short: pod nearly 2 inches long, acumi- 

 nate at each end, obcompressed, partially 2-celled, strongly 

 incurved, soft-hairy. 



