LEGUMINOSiE. 55 



**Pod incompletely 2 -eel led. 



H- 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 on 

 scape-like peduncles. Pod obcompressed (flattened contrary 

 to the usual way), nearly straight, pubescent. 



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



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

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

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

 hoary. Rare. 



7. A. OPOboi'des, Hornem., var. Americanus, Gray. 

 Stems 12-18 inches high, grayish-puberulent. Leaflets 11- 

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

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



Atl. Prov. 



-i- -i- ->- Pod long-stalked. 



8. A. alpi'nus, L. Stems diffuse, 6-12 inches high, smooth 

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

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

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

 grooved on the back, pendent. Atl. Prov. 



* * * Pod strictly 1-celled, coriaceous or cartilaginous. 



A. Leaves pinnate, of many leaflets. 

 - Pod sessile. 



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

 pubescent, the branches striate and angled. Leaflets 

 numerous, nearly filiform,. Flowers large, white. Pod short, 

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

 thick dorsal suture. 



+- +- Pod with a very short stalk. 



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

 feet high. Leaflets 11-21, comparatively large, minutely 

 hoary beneath. Flowers white, in short spikes. Pod 

 inflated, smooth, slightly furrowed on both sides. Ontario 

 and Quebec. 



