PEA FAMILY 483 



Calyx-lobes subulate-tipped, longer than the tube; plants erect or decumbent, 

 with a short cespitose caudex; spike dense. 

 Leaves 3-foIiolate. 8. P. Jamesii. 



Leaves 5-foUoIate. 



Stem low, 1-2 dm. high, decumbent at the base; spike sessile or short-ped- 



uncled. 9. P. carnescens. 



Stem tall, 3-5 dm. .high, with the upper leaves reduced and spike rather 

 long-peduncled. 10. P. aurea. 



1. P. Fremontii (Torr.) Vail. Shrub with white stems; branches canescent- 

 strigose, somewhat spiny; leaflets often somewhat decurrent on the slightly 

 winged rachis, 5-10 mm. long; spike elongate; calyx strigose; lobes lanceolate, 

 2 mm. long; corolla indigo-blue; keel about 8 mm. long; banner 6 mm. long; pod 

 ovoid; body 1 cm. long, strigose. Rocky places: s Utah — Nev. — Calif. L. Son. 

 My-Je. 



2. P. Johnsoni (S. Wats.) Vail. Shrub, with light-colored bark; branches 

 strigose; leaflets 8-15 mm. long, 1 mm. wide, strigose-canescent ; spike 5-7 cm. 

 long, lax; calyx finely puberulent or glabrous; tube 3-4 mm. long; lobes 2 mm. 

 long, the upper ovate-lanceolate, the rest lanceolate; corolla bluish purple; keel 

 8 mm. long; banner slightly shorter; pod minutely strigose; body 8 mm. long. 

 Rocky hills: Ariz. — s Utah — Nev. Son. My. 



3. P. amoena (S. Wats.) Vail. Branched shrub; branches strigose; leaf- 

 lets 7-11, narrowly linear, 6-8 mm. long, obtuse, strigose-canescent; spike loose, 

 few-flowered; calyx pilose; tube 4 mm. long; teeth lance-subulate, 4 mm. long; 

 corolla dark purple; keel 10 mm. long; banner slightly shorter; pod densely 

 pubescent. Arid places: s Utah — Nev. — Ariz. L. Son. Ap. 



4. P. alopecuroides (Willd.) Rydb. Annual; stem erect, glabrous, with 

 ascending branches, 2-6 dm. high; leaflets 15-41, oblong, cuneate, or oblanceolate, 

 3-8 mm. long, obtuse at the apex; spike 2-7 cm. long; bracts ovate to lanceolate, 

 acuminate, hyaline-margined; calyx-lobes linear-lanceolate, long-acuminate, 

 plumose; corolla 2.5-3 mm. long, white, tinged with rose or lilac. Dalea alo- 

 pecuroides Willd. P. Dalea Britton. Prairies: S.D. — 111. — Ala. — Tex. — N.M. 

 Plain. Je-S. 



5. P. enneandra (Nutt.) Britton. Perennial, with a taproot ; stem simple 

 below, branched above, 3-10 dm. high, flat-topped; leaflets 5-11, linear, linear- 

 oblong, or oblanceolate, 5-10 mm. long, glabrous, conspicuously glandular- 

 dotted; spikes 2-11 cm. long; calyx silky; lobes filiform-subulate, plumose, about 

 6 mm. long; corolla white; banner about 12 mm., keel 15 mm. long. D. laxiflora 

 Pursh. Prairies: N.D.— la.— Mo.— Tex.— Colo. Plain. My-Au. 



6. P. formosa (Torr.) Vail. Divaricately branched shrub, 3-6 dm. high; 

 leaflets 9-13, glabrous, cuneate to oblong, 2-4 mm. long, thick, retuse at the 

 apex, revolute; bracts acuminate, ciliate, 5 mm. long; calyx villous; teeth 8 mm., 

 subulate-setaceous, plumose; corolla reddish purple; keel 12-15 mm. long; 

 banner 7-8 mm. long. Dry soil: s Colo. — Utah — Ariz. — Tex. Son. Ap-0. 



7. P. lanata (Spreng.) Britton. Stems branched at the base, decumbent, 

 2-6 dm. long, densely short-villous; leaflets 9-13, cuneate, 4-12 mm. long, obtuse, 

 truncate or retuse, densely short-villous; spikes slender, 2-10 cm. long, many- 

 flowered; bracts ovate, acuminate, 3-4 mm. long; calyx 3-3.5 mm. long, velutin- 

 ous; lobes lanceolate, shorter than the tube; corolla purple, rarely white; keel 

 nearly 5 mm. long; banner 3 mm. long. Dry soil: Kans. — Tex. — N.M. — Colo.; 

 Mex. Son. Je-Au. 



8. P. Jamesii (T. & G.) Vail. Stems silky-strigose, ascending or decum- 

 bent, 5-20 cm. high; leaflets obovate, 5-15 mm. long, appressed silky-canescent ; 

 spike short-peduncled, 2-3 cm. long, dense; bracts ovate, acuminate, 8-10 mm. 

 long; corolla yellow, in age turning purplish; keel 10-12 mm. long; banner about 

 half as long. P. Porleri A. Nels. Dry plains and hills: Colo. — Tex. — N.M. 

 Son. — Stihmont. My-Au. 



9. P. carnescens Rydb. Stems 2-4 dm. high, strigose-canescent; leaflets 

 3-7, oblong-obovate, sparingly silky-canescent, 5-12 mm. long; spike dense, 

 oblong, 1-2 cm. long; bracts ovate, acuminate; corolla yellow, turning reddish; 



