PEA FAMILY 489 



4-15 



campanulate, 2 mm. long; teeth subulate, 2 mm. long; corolla cream-colored or 

 white (according to Gray sometimes purple), about 8 mm. long; pod ovoid, gla- 

 brous, about 2 cm. long, 1.5 cm. wide. A. Wardii A. Gray. Dry hills: Utah. 

 Submont. — Mont Je~Au. 



14. P. subclnerea (A. Gray) Rydb. Cespitose perennial; stems erect; 2-4 

 dm. high, cinereous-canescent; leaflets 15-21, linear or oblong, 6-10 mm. long, 

 retuse, cinereous on both sides; raceme short; calyx cinereous; tube 3 mm. long; 

 teeth subulate, 1 mm. long or less; corolla greenish, with purple tip, 6 mm. long; 

 pod ovoid-globose, puberulent, 1.5-2 cm. long, acute. A. suhcinereus A, Gray^ 

 Dry places: Ariz. — s Utah. L. Son. My-Je. 



15. P. CandoUeana H.B.K. Cespitose perennial; stems 1-3 dm. high, 

 branched, strigose, erect or spreading; leaflets 11-15, oblong, 6-15 mm. long, 

 obtuse, truncate, or retuse at the apex, grayish strigose or hirsute; raceme short; 

 calyx strigose; tube 2 mm, long; teeth subuiatC; nearly 2 mm. long; corolla ochro- 

 leucous, 6-7 mm. long; pod elhpsoid, 2-2.5 cm. long, 1-1.5 cm. broad, sparingly 

 pubescent, not mottled. A, iriflorus A. Gray, not B.C. Hills and mountains: 

 w Tex.— Colo.— Calif.— n Mex. Son. Ap-Je. 



16. P, cerussata (Sheld.) Rydb. Perennial; stems 2-3 dm. high, erect- 

 spreading, striate, sparingly strigose; leaflets 11-17, oblong to obovate, emargin- 

 ate, 5-12 mm. long, pilose-strigose on both sides, or glabrate above; racemes lax, 

 3-7-flowered; calyx strigose; tube and the subulate teeth each 2 mm. long; 

 corolla ochroleucous, tipped with purple, 8-9 mm. long; pod ellipsoid, 12-16 mm. 

 long, finely pubescent. A. cerussatus Sheld, Canons: Colo. SubmonL My-Je, 



17. P, serpens (M. E, Jones) Rydb. Perennial, with a thick woody root 

 and cespitose caudex; stems decumbent or ascending, 3-20 cm. long; leaflets 

 11-15, crowded, elliptic or oval, folded, 4-6 mm. long, grayish strigose; racemes 

 2-6-flowered; calyx strigose-canescent; tube 2 mm. long; teeth triangular-subu- 

 late^ 1 mm. long; corolla greenish purple, 7 mm. long; pod broadly ellipsoid, 

 about 15 mm. long, 1 mm. broad, mottled, glabrous. A. serpens M. E. Jones. 

 Dry mountains: Utah. SubmonL— MonL Jl. 



^8. P. Bilerana (M. E. Jones) Rydb. Perennial; stems many, decumbent, 

 5-8 dm. long, hirsutulous; leaflets about 9 pairs, 1-1.5 cm. long, oblanceolate, 

 oboyate or oblong, notched at the apex, hirsutulous; flowers subcapitate; calyx- 

 teeth subulate; corolla 7 mm. long, light yeUow; keel dark-tipped; pods purple- 

 spotted, sessile, short-pubescent, 12-15 mm. long. A. Sileranus M. E. Jones. 

 Among brush, on hillsides: Utah. Submont. — Mont. Je-Jl. 



19. P. Bodinii (Sheld.) Rydb. Perennial, scarcely cespitose; stems slender, 

 glabrous, 3-6 dm. high, decxunbent, branched; leaflets 11-17, oval to lanceolate, 

 acute, 7-18 mm. long, glabrous or sparingly strigose beneath; raceme lax, 4-16- 

 nowered; calyx strigose, with black hairs; tube 3 mm. long; teeth subulate, 2 mm. 

 long; corolla purple, 10-12 mm. long; pod ovoid, black-strigose, 8 mm. long, 4 

 mm. wide. A. Bodinii Sheld. Meadows: Neb.— Wyo.— Colo. Jl-Au. 



20. P. leptalea (A. Gray) Rydb. Cespitose perennial, with a rootstock; 

 stems ascending, 1-3 dm. high, branched; leaflets 15-21, lanceolate to linear- 

 lanceolate, acute, 5-10 mm. long, glabrous or sparingly strigose; racemes 1^- 

 flowered; calyx black-strigose; tube 2.5 mm. long; teeth subulate, 2-2.5 mm- 



?P^'.^*^^^'^^ white, tipped with purplish, about 1 cm. long; legiune oblong- 

 ellij)tic, strigiUose with black hairs, 1 cm. long, 4 mm. broad. A. leptaleus A. 



^ray. p, paucijlora Nutt., not Pers. Mountains: Colo. SubmonL — MonL 

 Jl-Au. 



. 21» p. microcystis (A. Gray) Rydb. Perennial, vdth a taproot and cespi- 

 tose caudex; stems numerous, ascending or procumbent, canescent-strigose; 

 leaflets 9-13, oblong or lance-oblong, obtuse, strigose on both sides, or glabrate 

 above; raceme lax; calyx strigose; tube and the subulate teeth each 1.5 mm. 

 long; corolla violet or nearly white, 6-7 mm. long; legume globose-obovoid, 6-8 

 nam. long, densely canescent. A, microcystis A. Gray. Hillsides and sandy 

 shores: B.C.— Mont.— Wash. Plain— SubmonL Jl-Au. 



