COMPOSITAE 625 



2. H. petiolaris Nutt. On dry prairies: Minn, to the N. W. 



Terr, and Ore., south to Mo., Tex. and Ariz. Sometimes 

 adventive eastward. 



Not uncommon as a weed in N. Y. and Conn., often wanting. 



3. H. giganteus L. (H. ambiguus (T. & G.) Britton). In swamps 



and wet meadows: Me. and Ont., to the N. W. Terr., south 

 to Fla., Neb. and La. 



Common throughout the range, except the pine-barrens, there 

 wanting. 



4. H. Maximiliani Schrad. On dry prairies: Minn, and Man. 



to the N. W. Terr., Neb. and Tex. Sometimes adventive 

 eastward. 



Rare as an established weed near New York and in Conn. 



5 H. Dalyi Britton. Known only from its original collection at 

 Sag Harbor, Long Island. 



6. H. divaricatus L. In dry woodlands, rarely in open grounds: 



Me. to Ont. and the N. W. Terr., south to Fla., Neb. 

 and La. 

 Throughout our range. 



7. H. grosseserratus Martens. In open places: Me. to N. J., S. 



Dak., Mo. and Tex. 



Conn. Newington and Oxford, apparently adventive at both 



localities. 

 N. Y. L. I. and on S. I.; rare. 

 N. J. Victoria, Gloucester Co. 



8. H. mollis Lam. In dry barren soil: Ohio to Ga., west to 



Iowa, Kan. and Tex.; also on L. I. and in Pa. 



Rare as an obvious adventive on L. I., at Pestletown, N. J., 

 and in Delaware Co., Pa.; otherwise unknown in our area. 



9. H. decapetalus L. In moist woods and along streams: Que. 



to Mich., Ga. and Ky. 



Throughout the range except in the pine-barrens and south and 

 east of them and on the L. I. coastal plain, there unknown. An 

 upland form, from near Woodlawn, N. Y. City, has been de- 

 scribed as H. scrophidariifolius Britton. Its leaves are more 

 irregularly serrate than in H. decapetalus. 



41 



