50 SPRING FLORA 



clawed. Standard relatively narrow; erect. Keel blunt. Sta- 

 mens diadelphous (9 and 1). 



Legume 1-celled, neither suture intruded... 1. A. diversifolliis 



Legume incompletely 2-celled by the intrusion of 1 or 

 both sutures. 



Legume more or less pubescent, but not woolly. 

 Leaves glabrous or nearly so. 



Legume sessile; flowers purplish; calyx 



black-strigose 2. A. cibarius 



Legume stipitate; flowers yellowish; calyx 



glabrous 3. A. Beckwithii 



Leaves silky-pubescent 4. A. argophyllus 



Legume decidedly woolly-pubescent. 



Leaflets oblong; flowers yellowish -white. . 5. A. Purshii 

 Leaflets subrotund; flowers pink-purple 6. A. utahensis 

 Legume completely 2-celled. 



Legume leathery; not inflated 8. A. agrestis 



Legume papery; conspicuously inflated. . . 9. A. lentigrinosua 



1. A. diversifolius A. Gray. (A. junciformis A. Nelson; A. 

 junceus A. Gray.) Pubescent with short ashy hairs. Stems 

 slender, elongated, diffuse; weak and at length decumbent. 

 Petioles short; flattened. Leaflets 1-5, linear or narrowly- 

 lanceolate. Peduncles 1-5-flowered. Corolla yellowish-white, 

 the keel rather faintly purple-tipped. Legume cylindrical; 

 oblong-linear, straight or slightly curved; canescent-puberu- 

 lent; less than an inch long. Dry soil. May-October. 



2. A. cibariua (Jones) Sheldon. (A. Webberi cibarius Jones.) 

 Tidy Tips; Lady Fingers; "Wild Sweet Pea." Stems 1 ft. long 

 or less. Leaflets 9-21, narrowly elliptical to nearly round; 

 obtuse or retuse. Stipules large, erect, persistent; purplish- 

 tinged. Racemes 6-12 flowered; capitate at first, elongated 

 in fruit. Standard whitish or light purple, keel dark purple; 

 wings whitish, purplish -tinged. Legume smooth, leathery; 

 twice as long as broad; tipped by the persistent style. Dry 

 soil. March-June. 



3. A. Beckwithii T. & G. Stems 1-2 ft. long, several from the 

 same root; diffusely spreading; glabrous or nearly so. Leaf- 

 lets 6-12 pairs, broadly elliptical, y 2 inch long. Inflorescence 

 a short, loose raceme of 5-8 yellowish -white flowers. Legume 

 about 1 inch long, slightly curved; often blotched with red. 

 In dry soil. May-June. 



4. A. argophyllus Nutt. (A. glareosus Dougl.) Depressed- 

 caespitose; villous-silky with white hairs. Stem short. Leaf- 

 lets 11-15. Flowers 3-6. Corolla narrow, bright violet. Legume 

 incurved: silky-pubescent, but becoming grabrate; oblong- 

 ovate. Dry gravelly soil or rocky places. May-July. 



5. A. Purshii Dougl. Canescent with a long, dense, woolly 

 pubescence. Stem very short. Leaflets 9-17; lanceolate or 

 oblong. Flowers yellowish-white, the keel purple-tipped. 

 Legume leathery, very densely white-woolly, somewhat curved. 

 Dry plains. June-July. 



