Eupatorium 



COMPOSITAE 



907 



50 



Map 1983 

 Eupatorium fistulosum Barratt 



^50 



Map 1984 



Eupatorium purpureum L. 



~3o 

 Map 1985 



Eupatorium serotinum Michx. 



three species of the Joe-pye-weeds and, if I had, I might have been able to 

 extend the range of this species farther north in the state. 

 S. Maine, R. I., w. Pa., and Ohio, southw. to Fla. and Tex. 



3. Eupatorium purpureum L. (Probably Eupatorium purpureum var. 

 amoenum (Pursh) Gray of Gray, Man., ed. 7 and Eupatorium falcatum 

 Michx.) Green-stem Joe-pye-weed. Map 1984. Infrequent, probably 

 throughout the state in moist or dry soil, usually in wooded ravines, open 

 woodland, and clearings; also near the bases of slopes bordering wet 

 grounds. 



Mass., Ont., Wis., and Nebr., southw. to Ga. and Okla. 



4. Eupatorium serotinum Michx. Late Eupatorium. Map 1985. This 

 species prefers a slightly acid soil and is more or less frequent to common 

 in such habitats. It prefers a moist, white clay or moist, black, sandy soil. 

 In the "flats" in the southern part of the state, it sometimes covers acres 

 of fallow or pasture lands. Stock do not eat this species nor any other 

 species of Eupatorium unless they are forced to do so by scarcity of food. 

 It is, no doubt, rare or absent from the area where it is not represented 

 on the map. 



Del. to Minn., southw. to Fla. and Tex. 



4a. Eupatorium serotinum var. polyneuron F. J. Hermann (Rhodora 

 40: 86. 1938.) This form was found by Edna Banta in Jefferson County 

 in 1933. It was found in hard, white, moist, clay soil in a flat beech woods 

 on the Schumann farm about 3 mi. northeast of Hanover. This is the only 

 known station for it. 



5. Eupatorium altissimum L. Map 1986. Very local but not rare where 

 it is found. Most of my specimens are from high, wooded banks of streams ; 

 frequent in Henry County in one place at the base of a high slope that 

 borders a marsh, and frequent in a prairie habitat in Benton County. Its 

 habitats and locations in Indiana suggest that it is a prairie plant. 



Pa. to Minn., southw. to N. C. and Tex. 



