Erigeron canadensis L Horseweed. 



Common. 



Erigeron pusillus Nutt. 



Common in nurseries, on sandy point near Hickey Run outlet, location 36, 

 and in field east of R Street, location 26. 



Erigeron strigosus Muhl. (E. ramosus (Walt.) B.S.P.) . . .Daisy fleabane. 



Common. 

 Eupatorium album L , . Eupatorium. 



Thin woods and fields. 

 Eupatorium coelestinum L Mistflower. 



Low ground and along watercourses. 

 Eupatorium hyssopifolium L. 



Frequent in meadows. 

 Eupatorium hyssopifolium var. laciniatum Gray (E. torreyanum Short) 



Common in fields. 

 Eupatorium perf oliatum L Boneset. 



Frequent in fields and thickets. 

 Eupatorium pilosum Walt. (E. verbenaefolium Michx.) 



Dry open woods. 

 Eupatorium pubescens Muhl. 



Fields and woods. 

 Eupatorium purpureum L Joe-pye-weed. 



Meadows and thickets. 

 Eupatorium rotundifolium L. 



Thin dry woods. 

 Eupatorium rugosum Houtt. (JB. urticaefolium Reich.) . .White snakeroot. 



Frequent in woods. 

 Eupatorium serotinum Michx. 



Rare, found in edge of woods in location 51. 

 Galinsoga ciliata (Raf.) Blake (G. parviflora var. hispida DC.) 



Common. 

 Gnaphalium obtusif olium L. . . Sweet everlasting. 



Woods and fields. 

 Gnaphalium purpureum L Purple cudweed. 



Common in disturbed soil. 

 Helenium nudiflorum Nutt Sneezeweed. 



Occasional in fields. 



44 



