402 FABACEAE 



Plants pubescent or scabrous. 



Leaflets thick, coriaceous, velvety 



pubescent beneath. 13. M. viridiflora. 



Leaflets scarcely coriaceous, ap- 

 pressed pubescent or villous 

 beneath. 14. M. Dillenii. 



Loment sessile in the calyx or nearly so. 

 Loment joints 4-7; flowers numerous, 



showy. 15. M. canadensis. 



Loment joints 1-3. 



Leaflets scabrous 2-5 cm. long. 16. M. rigida. 

 Leaflets not scabrous 1-2 cm. long. 

 Plant nearly glabrous 



throughout. 17. M. marylandica. 



Stem pubescent, leaflets and 



petioles ciliate. 18. M. obtusa. 



1. M. nudiflora (L.) Kuntze. In dry woods: Que. to Minn., Fla. 



and La. 



Throughout the area except in the pine-barrens of N. J., there 



wanting. 



2. M. grandiflora (Walt.) Kuntze. In dry rocky woods: Que. to 



S. Dak., Fla., Neb. and Ind. Terr. 



Conn. Throughout the state, not very common. 



N. Y. Exclusively north of the moraine on L. I. ; unknown on S. I., 



thence scattered up the Hudson Valley to the Highlands; thence 



increasing northward. 

 N. J. Gloucester, Ocean and Monmouth counties, north and 



west of the pine-barrens, increasing northward. 

 Pa. Northampton, Bucks, Montgomery, Delaware, Philadelphia 



and Chester counties. 



Tertiary, o: Cretaceous, a single station in Monmouth Co., N. J. 

 and perhaps in Bucks Co., Pa.: Older Formations, increasing north- 

 ward. 138-220 days. Sea level-1,900 ft. 



3. M. pauciflora (Nutt.) Kuntze. In woods: Ont. to western 



N. Y., southern Pa. and N. J. to Fla., Ohio, Ark. and La. 

 N. J. New Egypt, Ocean Co. 

 Pa. Chester Co. 



4. M. Michauxii Vail. Dry woods: Me. (?) and Ont. to Minn., 



Fla. and La. 



Conn. Throughout the state, decreasing northward. 

 N. Y. Uncommon on L. I. and S. I., decreasing northward to the 

 Highlands of the Hudson, unknown elsewhere. 



