574 PROCEEDINGS OF THE ACADEMY OF [Oct., 



Delaware. — FawkesRun; Wawa. 

 Chester. — Sugartown Barrens ; Unionville. 



J183. HlERACIUM GRONOVII L. 



Frequent in dry border-woodland. 



Delaware. — Bear Hill; Mineral Hill; Williamson. 



fl84. Nabaltjs serpentarius (Pursh) Hook. 



Frequent in dry woodland. 



Delaware. — Williamson ; Wawa. 



Chester. — Sugartown Barrens ; West Chester ; Unionville. 



J 185. Ambrosia artemisi^efolia L. 



Occasional on dry open barren, probably here introduced. 

 Delaware. — Williamson. 



Chester. — Sugartown Barrens; Cedar Barrens; West Chester; 

 Unionville. 



186. Vernonia noveboracensis (L.) Willd.- 



Frequent on moist open or on moist banks. 



Delaware. — Williamson. 



Chester. — Cedar Barrens; West Chester; Unionville. 



187. Vernonia glauca (L.) Willd. 



On a grassy bank. 

 Delaware. — Lenni. 



188. EUPATORIUM PUBESCENS Mllhl. 



Local, on dry open barren. 

 Chester. — Nottingham Barrens. 



189. EUPATORIUM PERFOLIATUM L. 



Frequent in moist soil, Serpentine swamps, or occasionally on 

 dry open barren. 



Delaware. — Bear Hill ; Middletown Barrens ; Williamson. 

 Chester. — West Chester; Unionville. 



fl90. EUPATORIUM AROMATICUM L. 



Common on diy open barren and border of woodland. 

 Delaware. — Fawkes Run; Bear Hill; Mineral Hill; Williamson; 

 Wawa. 



Chester. — Sugartown Barrens; Cedar Barrens; West Chester. 

 — Nottingham Barrens. 



