PEA FAMILY 495 



12-14 mm. long; pod ovoid, 8-19 mm. long, strigose. A. adsurgens Hook., not 

 Pall. A. nitidus Dougl. A. Crandalii Gand. Plains and hills: Sask Minn 

 Colo. Ore. B.C. Plain Mont. Je-Jl. 



12. A. sulphurescens Rydb. Stems ascending, about 4 dm. high, angled, 

 glabrous; leaflets 13-19, elliptic, obtuse or acutish, mucronulate, 12-30 mm. 

 long; spike dense and elongate; calyx white-strigose, with scattered black hairs; 

 tube about 5 mm. long; lobes almost filiform, 5 mm. long; corolla light yellow, 

 white, or pinkish; banner 15-18 mm. long, much exceeding the wings and keel- 

 pod about 1 cm. long, 3-4 mm. wide, strigose, with black hairs. Mountains: 

 Colo. Mont. Submont. Mont. Je-Au. 



13. A. oreganus Nutt. Stem ascending or erect, branched, grayish-canes- 

 cent; leaflets 9-21, broadly obovate, 7-20 mm. long, canescent with crisp hairs 

 on both sides; peduncles 5-8 cm. long; spike at first short, in age elongate, 10-20- 

 flowered; calyx-tube about 6 mm. long, more or less black- and white-hairy; 

 teeth subulate, 2 mm. long; corolla 16-18 mm. long; pods sessile, slightly curved. 

 A. ventorum A. Gray. Sand hills: Wyo. Ida. Plain Submont. Je. 



14. A. virgultulus Sheld. Stems 1.5-2 dm. high, erect or ascending, striate, 

 glabrous or nearly so; leaflets 13-19, oblong or oblong-lanceolate, 5-8 mm. long, 

 obtuse or acute, glabrous above, sparingly strigose beneath; peduncles 5-10 cm. 

 long; spike short, 2-3 cm. long; calyx-tube 6-7 mm. long, black- and white-hairy; 

 teeth subulate, 3-4 mm. long; corolla ochroleucous, 12-15 mm. long; pod 10-12 

 mm. long. A. hypoglottis bracteatus Osterhout. River banks: Colo. Wyo. 

 Submont. Je-Jl. 



16. A. goniatus Nutt. Stems 1-2 dm. (rarely 3 dm.) high, strigose, de- 

 cumbent or ascending, zigzag; leaflets 15-21, linear-oblong to elliptic, obtuse or 

 retuse, 5-10 mm. long, sparingly strigose on both sides or glabrate; peduncles 

 about 5 cm. long; spike globose or oblong, 2-3 cm. long; calyx-tube 6-7 mm. 

 long, usually with black hairs; teeth 2-3 mm. long, subulate; corolla about 15 

 mm. long; pod villous, about 1 cm. long, ovoid. A. hypoglottis Richards., not L. 

 A. agrestis M. E. Jones, not Dougl. Meadows and river valleys: Hudson Bay 

 N.M. Utah Ore. B.C. Plain Mont. Je-Au. 



16. A. agrestis Dougl. Stems decumbent or ascending, about 2 dm. high, 

 glabrous or nearly so; leaflets oblong or oblong-lanceolate, 7-15 mm. long, obtuse 

 or retuse, sparingly strigose or glabrate; peduncles 5-10 cm. long; spikes oblong 

 or globose, 2-3 cm. long; calyx-tube 5-6 mm. long; teeth subulate, 4-5 mm. long; 

 corolla purple, 15-18 mm. long; pod as in the preceding. Meadows: Man. 

 Sask. Mont. Plain. Je. 



17. A. Spaldingii A. Gray. Stem 1-A dm. high, villous; leaves 5-7 cm. 

 long; leaflets 21-25, lanceolate or lance-linear, villous; peduncles 5-10 cm. long; 

 spike oblong, 2-4 cm. long; calyx villous; tube 3-4 mm. long; teeth setaceous, 

 4-5 mm. long; corolla light yellow, 9-10 mm. long; pod villous, ovate, coriaceous, 

 turgid, scarcely sulcate; cells 3-4-ovuled,^but often only 1-seeded. Plains: 

 Wash. Ida. Ore. Plain. My-Jl. 



18. A. palans M. E. Jones. Stems ascending, glabrous throughout; 

 leaflets 17-25, obovate or elliptic, 6-15 mm. long, obtuse or retuse, glabrous; 

 peduncles about 1 dm. long; racemes 6-10-flowered; calyx sparsely nigrescent; 

 tube 4 mm. long; teeth 3 mm. long, subulate; corolla pink, about 15 mm. long; 

 legume linear, acuminate, arcuate, sulcate on both sides, less so on the lower 

 side; lower suture inflexed, forming a not quite complete septum. Canons: 

 Utah Ariz. Submont. Je. 



23. HAMOSA Medic. 



Annual, biennial, or perennial herbs, with decumbent or tufted stems. Leaves 

 alternate, odd-pinnate; stipules almost free and distinct; leaflets numerous, 

 entire, usually truncate or notched at the apex. Flowers perfect, in short 

 racemes, few. Calyx short-campanulate, 5-lobed; lobes subulate, nearly equal. 

 Corolla usually purplish; banner with rather broad blade, erect; wings usually 

 longer than the unbeaked keel. Stamens 10; filaments diadelphous; anthers 



