Astragalus. LEGUMINOSJE. 



16. A. leucopsis, Torr. & Gray. Tomentulose-canescent, a foot high : leaflets 

 in many pairs, from broadly oblong to almost linear, half an inch or more in length: 

 spike-like raceme mostly short (an inch or two long, rarely longer) : calyx-teeth 

 more than half the length of the campanulate tube : flower otherwise nearly as 

 in the foregoing : the pod similar, but somewhat tapering at base into a nearly 

 glabrous stipe of half an inch or less in length and only twice or thrice the length 

 of the calyx-tube. Bot. Mex. Bound. 56, t. 16. Phaca canescens, Kutt. P. leu- 

 co2)sis, Torr. & Gray, Fl. i. 694. 



Dry hills, Santa Barbara to San Diego Co. 



17. A. trichopodus, Gray. Strigulose-puberulent or at first hoary, in age 

 almost glabrous : stem slender, a foot to a yard high : leaflets in many pairs, from 

 narrowly oblong to nearly linear, about half an inch long : raceme short : flowers 4 

 or 5 lines long : calyx-teeth very much shorter than the campanulate tube : corolla 

 yellowish white : pod oval, obtuse at both ends, over half an inch in length, but 

 very much smaller and less bladdery than any other of this subdivision ; its stipe 

 only a quarter of an inch long. Phaca trichopoda, Nutt. 



Dry hills, common in and near Santa Barbara Co. 



A. AMPULLARIUS, Watson, the only remaining known species of this subdivision, is dwarf, 

 short-peduncled, with rather few leaflets, violet-purple flowers, extremely short calyx-teeth, and 

 pod ovate with a truncate or abrupt base, on a stipe of its own length. It inhabits S. Utah, but 

 may approach the borders of California. 



-t- +- Pod sessile in the calyx (not at all stipitate), 



++ Large and very bladdery, over an inch and sometimes two inches long, many- 

 seeded : leaflets mostly in many pairs : spike or raceme many-flowered. 



= Stipules (at least the upper ones) herbaceous and rigidly deflexed : corolla appar- 

 ently pale yellow or cream-color, short and broad, incurved : stems 3 to 6 feet 

 long, straggling or decumbent and branching. 



18. A. oocarpus, Gray. Glabrous, or young parts minutely pubescent : stems 

 flexuous and with spreading branches : leaflets from oblong to broadly linear, obtuse 

 (from half to an inch long), bright green and of thickish firm texture : peduncles 

 sometimes exceeding the leaves : flowers loose in the raceme, 4 or 5 lines long : 

 calyx campanulate and with very short triangular-subulate teeth : corolla compara- 

 tively short, with keel much incurved and standard turned back : pod ovate or 

 oval and short-pointed, an inch to an inch and a half long, of parchment-like tex- 

 ture ; the seed-bearing suture somewhat projecting into the cell. Proc. Am. Acad. 

 vi. 213. A. Crotalarice, Torr. Bot. Mex. Bound. 56, t. 17, excl. syn. 



Common through the mountains east of San Diego, Parry, Cleveland, Palmer. A strongly 

 marked species, varying however in the size and shape of the pod, which in the smaller form is 

 ovate, but in the larger is elongated-oval and the walls more membranaceous. 



= i= Stipules scarious or nearly so : leaflets usually crowded in very many pairs : 

 peduncles elongated and bearing numerous soon deflexed flowers, which are usually 

 crowded in the raceme : corolla straightish and narroiv, fully half an inch long, 

 yelloivish-ichite or white, or sometimes the tips dusky-purplish. 



19. A. Crotalarice, Gray, 1. c. Glabrous or slightly pubescent, or the young 

 parts sometimes villous : stems erect or nearly so, 2 or 3 feet high, usually stout : 

 leaflets from oblong-linear to obovate-oval or slightly obcordate, thickish (from a 

 quarter to a full inch long) : stipules triangular and distinct : calyx-teeth subulate, 

 about half the length of the short-campanulate tube : corolla white : pod of rather 

 parchment-like texture, but much inflated, ovoid, an inch to an inch and a half in 

 length. Phaca Crotalarice, Benth. PI. Hartw. 1 P. densifolia, partly, of authors. 



Var. virgatus, Gray. Stipules more subulate : racemes virgate and loose, 4 to 

 10 inches long : calyx-teeth subulate-setaceous and longer. 



