Eupatorium COMPOSITAE Eupatorium 



E. verbenaefolium Mx. 



Common from the Fall Line southward to Northampton 

 County, in swamps, salt meadows and dune hollows. July, Aug. 



E. rotundifolium L. 



Frequent in fields, meadows and dry pine woods, from near the 

 Fall Line southward at least to Wicomico County. Mid-July to 

 Sept. 



E. pubescens Muhl. {E. rotundifolium var. ovatum Fern., in 

 Rhodora 37, 179-181. 1935.) 

 Frequent in dry sandy ground and borders of salt marshes. 

 Piedmont, and southward on the Coastal Plain to Wicomico County. 

 Aug., Sept. 



E. sessilifolium L. Upland Boneset. 



Frequent on rocky, wooded slopes of the Piedmont province. 

 Mid-July to mid-Sept. 



Var. Vaseyi (Porter) Fernald & Griscom. See Rhodora 37, 

 180. 1935. 

 Occasional in dry sand of the Coastal Plain: between Quan- 

 tico and Salisbury (Wi), Tidestrom, 7427 (see the reference to 

 Rhodora); woods IM mi. e. of Wattsville (Ac), R. R. Tatnall, 

 4351, 10 Aug. 1939 (T). Aug. 



E. perfoliatum L. Thoroughwort. Boneset. 



Common in low ground of the Piedmont, and less frequent on 

 the Coastal Plain to Northampton County. Mid- Aug., Sept. 



E. resinosum Torr. 



Rare, in low pine barrens: near Gumboro (S), Commons, 5 Aug. 

 1874 (A); "Baltimore Hundred" (S), Commons, 10 Sept. 1875 (A). 

 Aug., Sept. 



E. rugosum Houtt. {E. urticaefolium of manuals. See Rhodora 

 40, 293. 1938, and 43, 557-558. 1941.) 

 Frequent, in woods and thickets of the Piedmont and northern 

 part of the Coastal Plain; rare southward: woods 5 mi. s. e. of 

 Easton (Ta), Earle, 3113, 4 Sept. 1940 (P). Aug. to Oct. 



E. aromaticum L. 



Infrequent, in sandy woods and thickets of the Coastal Plain, 



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