Astragalus. LEGUMINOS^. I^q 



IG. A. leucopsis, Torr. & Gray. Tomentulose-cauescent, a foot liigh : 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 oidy twice or thrice the length 

 of the calyx-tube. — Bot. Mex. Bound. 56, t. 16. Fhaca canescens, Xutt. P. leu- 

 copsis, Torr. & Gray, Fl. i. 694. 



Dry liills, 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 yartl 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 tlian the campanulate tube : corolla 

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

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

 only a quarter of an inch long. — Phaca tricliopoda, Nutt. 



Dry hills, common in and near Santa Barbara Co. 



A. AMPULLARius, Watson, the only remaining known species of this subdinsion, is dwarf, 

 short-peduncled, with rather few leaflets, violet-purple flowers, exti-emely 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. 



-s- -i- Pud sessile in the calyx [not at all stipitate), 



■i->r 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 2}<-de yellov) or cream-color, short and broad, incurved : sterns ^ to Q feet 

 long, straggling or decumbent and branching. 



1 8. 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, varj'ing 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. 



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

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

 croioded in the raceme : corolla straightish and narroio, fully half an inch long, 

 yelloivish-tuhite or lohite, or sometimes the tip>s dusky-purplish. 



19. A. CrotalariSB, Gray, 1. c. Glabrous or slightly pubescent, or tlie 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 sul)ulate, 

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

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

 length. — Phaca Crotcdarire, Benth. PI. Hartw. ] /'. densifolia, partly, of authore. 



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

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



