LEGUMINOSiE 71 



purple, the standard shorter than the wings; racemes on peduncles about 

 the height of the leaves; pod 1-2-seeded. Dry sandy soil, W. Sask. 



3. L., pusQlus, Pursh. 



Annual, low, 4-8 in. high, stout, diffusely branched, hairy with coarse 

 hairs; leaflets mostly 5, wedge-shaped or oblong, nearly glabrous above; 

 flowers blue in numerous dense short-peduncled racemes ; pods 1-2-seeded. 

 S. Alta. 



5. PSORALEA. 



Calyx 5-toothed; stamens usually diadelphous, half the anthers 

 smaller than the others; pod thick, indehiscent, 1-seeded, seldom 

 projecting beyond the calyx. Perennial" herbs usually roughened 

 with glandular dots, having 3-5-foliate leaves, and flowers in spikes 

 or racemes. 



1. P. argophylla, Pursh. 



Erect, 6-18 in. high, branched, whitish silky-pubescent throughout; 

 leaves linear to obovate, acute; flowers deep blue, in interrupted spikes. 

 Dry soil, Man.— Alta. 



2. P. lanceoUta, Pursh. 



Glabrous or nearly so, yellowish green, densely covered with glandular 

 dots; leaflets 3, linear to oblanceolate; flowers small, bluish white, in short 

 spikes; fruit globular. Sandy hills, W. Sask. and Alta. 



3. P. esculenta, Pursh. 



Rough; hairy, stout, 6-12 in. high; leaves palmately 5-foliate; leaflets 

 obovate; flowers pale blue; raceme spike-like, short, dense, on a long pe- 

 duncle. Low perennial herbs from a spindle-shaped edible root. Dry plains, 

 Man.-Alta. 



6. TRIFOLIUM. Clover. 



Calyx 5-cleft, teeth bristle-like; corolla papilionacequs, the petals 

 more or less united to the stamen tube; stamens usually diadel- 

 phous, 9 and 1, but the separation of the tenth stamen not always 

 complete; pods small, straight, and membranous, included in the 

 persistent calyx and withered corolla. Diffuse herbs with palmately 

 3-foliate leaves and flowers in heads. 



1. T. repens, L. White Clover. 



Smooth, eroding,; perennial; leaflets notched at the apex; flowers white, 

 in small loose heads. A common importation in lawn grass mixtures. 



2. T. pratSnse, L. Red Clover. 



Perennial, stems ascending, hairy; leaflets ovate, sometimes notched at 

 the apex, with a pale spot on the upper surface; stipules broad; heads ovoid, 



