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 perfoliatum 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. (£. urticaefolium Reich.) . .White snakeroot. 



Frequent in woods. 

 Eupatorium serotinum Michx. 



Rare, found in edge of woods in location 51. 

 Galinsoga ciliata (Raf.) Blake (G. parvi flora var. bispida DC.) 



Common. 

 Gnaphalium obtusifolium L Sweet everlasting. 



Woods and fields. 

 Gnaphalium purpureum L Purple cudweed. 



Common in disturbed soil. 

 Helenium nudiflorum Nutt Sneezeweed. 



Occasional in fields. 



44 



