Papilionaceae 169 



Style slender with a tuft of hairs at the summit. 



Vicia. 



Style flattened, bearded along the inner side. 



Lathyrus. 



Stems whitish with close hairs 

 Astragalus 



adsurgens or nearly smooth, ascending or 

 Pall. decumbent, 4-18 inches long, 



Ascending s i mp i e O r branched at the base. 



Milk-vetch. T ,, , 



Leaflets 15-25 oval or linear- 

 oblong, sometimes notched at the apex, 

 narrowed at the base, J-i inch long; pe- 

 duncles exceeding the leaves. Flowers pur- 

 plish, J-f of an inch long in dense short 

 spikes; calyx villous with long partly black 

 hairs, J the length of the corolla, with slender 

 teeth, half the length of the campanulate tube. 

 In open ground at low altitudes, probably 

 the most frequent of the vetches on the 

 eastern slopes of the Rockies, often forming 

 great patches of blue during June. 



Astragalus Hairy or nearly smooth, stems 

 hypoglottis decumbent or ascending, slender, 



L. Purple branched at the base, usually 

 Milk-vetch. 



low, but ranging from 6-24 



inches long. Leaves 2-5 inches long with 



