LEGUMINOSAE. 213 



Anthers all alike. 



Leaves palmate or trifoliolate. 



Foliage glandular-dotted. 290. PSORALEA, 218. 



Foliage not glandular-dotted. 



Flowers in heads. 291. TRIFOLIUM, 218. 



Flowers in racemes. 



Racemes close, spike-like; pods 



curved or twisted. 292. MEDICAGO, 222. 



Racemes loose, long; pods straight. 293. MELILOTUS, 222. 

 Leaves pinnate. 



Leaves abruptly pinnate, usually with 



tendrils. 



Style filiform, hairy near the tip only. 294. VICIA, 222. 

 Style flattened, hairy on the inner 



side. 295. LATHYRUS, 223. 



Leaves odd pinnate, without tendrils. 



Pod a loment. 296. HEDYSARUM, 225. 



Pod not a loment. 



Flowers in umbels or solitary; pods 



linear. 297. HOSACKIA, 225. 



Flowers in spikes or racemes, rarely 

 solitary, then the pods not 

 linear. 

 Keel of the corolla acute or 



subulate at the apex. 298. OXYTROPIS, 227. 



Keel of the corolla obtuse at 

 the apex. 299. ASTRAGALUS, 227. 



287. THERMOPSIS. 



Perennial herbs; leaves alternate, palmately 3-foliolate, with 

 large foliaceous stipules; flowers large, yellow, in terminal or 

 axillary racemes; calyx campanulate, the lobes equal and separate 

 or the two upper united; standard nearly orbicular, equalling 

 the oblong wings and about equalling the keel; stamens 10, dis- 

 tinct; ovary sessile or short-stipitate; ovules numerous; pod 

 sessile or short-stipitate in the calyx, flat, linear, straight or 

 curved. 



Thermopsis gracilis Howell. (T. montana ovata Robinson.) Stout, 60-100 

 cm. high, the glabrous somewhat glaucous stems slightly branched above; 

 leaflets oval, ovate or obovate, mostly obtuse, cuneate at base, 3-6 cm. long, 

 glabrous above, pubescent beneath; stipules ovate or lanceolate, large; petioles 

 about as long as the leaflets; raceme terminal, short-peduncled, 8-16 cm. long; 

 flowers yellow, somewhat whorled, stout-pedicelled; calyx pubescent, its teeth 

 triangular, shorter than the tube; corolla nearly 2 cm. long; pods pubescent, 

 dark-colored, linear, slender-beaked, 5-10 cm. long, erect or ascending, 8-12- 

 seeded. 



In open woods, Chehalis County, Washington, Lamb, and southwards; 

 scarcely more than a subspecies of T. montana Nutt. 



. 288. LUPINUS. LUPINE. 



Annuals or herbaceous or shrubby perennials; leaves alternate 

 or basal, palmately 5-1 3-foliolate; flowers showy, often whorled, 



