LEGUMINOS^. 55' 



* * Pod incompletely 2-cellea. 



-i~ Pod sessile. 



5. A. Missourien'siS, Nutt, Stem very short, prostrate or 

 matted, hoary- silky- pubescent. Leaflets 5-15 or more. 

 Flowers large, violet or purplish, in few-flowered heads ore 

 acape-like peduncles. Pod obcompressed (flattened contrary 

 to the usual way), nearly straight, pubescent. 



-1- -1- Pod with a very short stalk. 



6. A. lotiflo'rus, Hook. Stems very short, hoary with 

 close pubtescence. Leaflets 7-13. Flowers yellowish, in 

 few-flowered heads. Pod oblong-ovate, acute at the base, 

 hoary. — Eare. 



7. A. oroboi'des, Hornem., var. Amerieanus, Oray. 

 stems 12-18 inches high, grayish-puberulent. LeaflAts 11- 

 15, oval to linear-oblong. Flowers in a long 1-sided racema. 

 Pod lens-shaped, gray-pubescent, grooved on the back. — 

 Atl. Prov. 



-1- -t- -t- Pod long-stallced. 



8. A. alpi'nus, L. stems dsjfwse, 6-12 inches high, smooth 

 or hairy-pubescent. Leaflets 13-25, oval or oblong. Eacemes 

 short, many-flowered, the flowers violet-purple. Pod nar- 

 rowly oblong, hlack - pubescent, triangular-turgid, deeply 

 grooved on the back, pendent. — Atl. Prov. 



* * * Pod strictly l-celled, corlaceons or cartilaginons. 



A. Leaves pinnate, of many leaflets. 

 .1- Pod sessile. 



9. A. peetina'tus, Dougl. Stem a foot high, grayish- 

 pubescent, the branches striate and angled. Leaflets 

 numerous, nearly Jiliform. Flowers large, to/iiie. Foi short, 

 ihick-cartilaginous, pendulous, cuspidate, smooth, with a very 

 thick dorsal suture. 



^ .*- Pod with a very short stalk. 



10. A. Coo'peri, Gray. Stem erect, nearly smooth, 1-2 

 feet high. Leaflets 1-1-21, comparatively large, minutely 

 hoary beneath. Flowers white, in short spikes. Pod 

 inflated, smooth, slightly furrowed on both sides. — Ontario 

 and Quebec. 



