146 FABACEAE 



Leaflets densely canescent. 10. .4 Hallii. 



Leaflets 5-11, densely canescent. 11. A. oreophilus. 



IV. Parrtaxi. 

 One species. 12. A. Parryi. 



V. C.\MPE.STRES. 



Plant not viscid. 



Corolla purple, rarely white. 

 Calyx with spreading hair.s. 



Calyx wliite-hairy ; corolla usually light purple. 



Plant loosely pubescent; peduncles with long spreading hairs. 



S. A. Lagopus. 

 Plant silky-canescent ; peduncles with appressed hairs. 



Plant low, densely cespitose; peduncles ascending, curved, less than 



5 cm. high; soike capitate. 13. .4. argophyllus. 



Plant taller, over 1 dm. high; spike elongate. 



Calyx long-hairy; wings broad. 14. A. Besseyi. 



Calyx short-hairy: wings narrow. 21. A. alberlinus. 



Calyx black-hairy; corolla dark, bluish ijurple. 



Plant wliite or grayish villous. 1.5. .4. atropurpureus. 



Plant silky, vrith appressed hairs, green. 16. A. melanodontus. 



Calyx with appressed hairs. 



Legumes about 3 cm. long, short-stipitate and long-acuminate; corolla over 2 



cm. long. 17. A. Bipelovii. 



Legume 2 cm. long or less, sessile. 



Legumes villous, almost 2-celled; caudices densely white-hairy; corolla 12 



mm. long. IS. .4. plnttensis. 



Legumes appressed-silky or short-hairy; caudices not conspicuously white- 

 hairy. 

 Legume nearly 2-celled; leaves white-silky. 



Corolla 12-15 mm. long; wings sUghtly emarginate. 



19. A. monticola. 

 Corolla about 2 cm. long; wings broadly and deeply emarginate. 



20. A. sericeus. 

 Legumes only half 2-celled. 



Leaves wliite-silky beneath; corolla 15 mm. long; pod ascending. 



21. A. albertinus. 

 Leaves green or only slightly silky. 



Legumes spreading; leaves elliptic or oblong; corolla 15 mm. 



long. 22. .4. (lispar. 



Legumes erect or strongly ascending; leaflets lanceolate or linear- 

 lanceolate, very acute. 

 Leaves spreading; pod 15 mm. long, abruptly contracted 

 into a short spreading beak; corolla 15 mm. long. 



23. A. anguslatus. 

 Leaves erect; pod 20 mm. long, long-acuminate, neaily 

 straight; corolla 18-20 mm. long. 24. A. Lambertii. 

 Corolla yellow, ocliroleucous or wlute, with a purple spot on the keel. 



Peduncles decumbent, curved, 1 dm. long or less. 25. A. alpicola. 



Pedimcles erect, 2 dm. liigh or more. 



Peduncles with long loose hairs. 26. A. villosus. 



Peduncles appressed-haiiy. 

 Flowers 12-15 mm. long. 



Lower leaves with conspicuously shorter and broader leaflets; flowers 



more or less spreading. 22. .4. dispar. 



Lower leaves similar to the upper or nearly so; flowers strongly ascend- 

 ing. 27. A. gracilis. 

 Flowers 18-25 mm. long; pods coriaceous. 



Corolla yellow; banner and ^\ings narrower than in the next, slightly 



notclied; legume nearly 2-celled. 2S. A. spicatus. 



Corolla wliite or straw-colored, banner and wings fully 1 cm. wide, 

 deeply notched; legume half 2-celled. 29. A. albiflorus. 



Plant more or less viscid. 



Calyx not black-hairy; pods abruptly acuminate; base of the plant >vith long yellow 



hairs. 30. -4. riscidus. 



Calyx black-hairy; pods long-acuminate; base of the plant not yellow-hairy. 



31. A. viscidulus. 

 VL Verticilu^ti. 



Bracts usually shorter than the flowers. 



Leaflets lance-oblong to elliptic, densely silky-pubescent. 32. A. Richardsonil. 



Leaflets hnear-lanceolate, rather sparingly silky. 33. .4. galioides. 



Bracts much exceeding the flowers. 34. A. splendens. 



38. GLYCYRRHIZA (Tourn.) L. Liquorice. i. G. lepidota. 



39. HEDYSARUM (Tourn.) L. Hedysarum. 



Calvx-teeth shorter than the tube; reticulations of the pods polygonal. 



Corolla sulphur-yellow; fruit glabrous. 1. U- sulphurcscens. 



Corolla purple, rose, or rarely white. 



Fruit glabrous, except as to a few hairs on the margins; internodes G-8 mm. long. 



2. //. amcricanum. 

 Fruit distinctly appressed-pubescent; internodes 8-15 mm. long. 



