LEGUMINOS^. (PCLSE FAMILY.) 65 



Short-stipitate, 



Glalprous V\ '? 



Piiberulenl ....... 



Sessile, 



Glabrous 413^ 47^ f^ 



Puberuleiit or pubescent. 



Stems a span or more high M, 67, i8 



Cespitose M, 6i,i» 



Woolly or villous S3, 48 



Systematic Synopsis. 



§ 13. Pod veri/ woolli/, short, tunjid, coriaceous, incurved, sessile. — IVry su/}- 

 wooUij : stems short, prostrate, from a stout perennial root : Jluwers usually one 

 inch lomj, loose! 1/ suhcapitate. 



33. A. Purshii, Dougl. Nearly ataulcsccut, rarely G inches high, canes- 

 cent with a long and dense woolly pubescence : leaflets lanceolate or oblong : 

 flowers ochroleucous, with the keel sometimes purplish. — W. Wyoming to 

 California and Oregon. 



§ 14. Pod membranous, inflated, globose, egj-shaped or semi-ovate, usually large, 



Jiiiely reticulated, glabrous or gl(d)rate. 



* Annual: pod sessile, not mottled : flowers small, ochroleucous or purplish. Low, 



leaflets linear or linear-oblong, gray with singulose hairs. 



34. A. triflorus, Gray, rinereous-pubescent, very ynuch branched from 

 the bas(, brandies ascending, G to 12 inches high : flowers 3 to 1.5: /W oval, 

 obtuse or acufish. — PI. Wright, ii. 45. S. Colorado and southward into 

 Mexico. 



35. A. Geyeri, Gray. Sornewhat simple, 3 to 6 inches high, subcanc^^ent, 

 with an appressed hairy pubescence : leaflets glabrous above : flowers 3 to 5 : 

 pod ovate-lunate ivith an incurved acuynination. — Proc. Am. Acad. vi. 214. Wyo- 

 ming, Idaho, and W. Nevada. 



* * Annual or perennial : pod stipitate. 



■«- Pod mottled : stipe equalling the calyx: flowers few, rather srnall. 



3G. A. pictus, Gray. Hoary with a loose silky pubescence: leaflets 3 to 



7 pairs, narrowly linear or filifcjrm, most of them usually abortive: pod ovoid, 



scarcely pointed, pendent. — Proc. Am. Acad. vi. 214. From Nel)rji.>ika to 



Idaho and New Mexico. In sandy places. 



Var. filifolius, Gray. Leaves usually imperfect ; leaflets very few, mostly 

 attenuated, tlio terminal one or the filiform racliis produced, j)ersistent. — I./iK'. 

 cit. 215. (.)n the plains of Colorado and southward. 



•»- •«- Pod not mottled. 

 fv Nearly stemless, feic-flowered : leaJJets 4 to 0-paired : ]X)d with o very short 



stipe. 

 37. A. megacarpus, Gray. Glabrous: leaflets broadlyov.nl or ovntc: 

 scape much shorter than the leaves: flowers ochroleucous or whitish: [hx] 

 ovate-oblong, acuminate, very obtuse at base. — Loc. cit. 215. "Plains of 

 the Rocky Mountains" (Nuttall). 



5 



