1910.] NATURAL SCIENCES OF PHILADELPHIA. 577 



207. Aster lateriflorus (L.) Britton. 



Common on dry open barren, edges of woodland or thicket. 



Delaware. — Fawkes Run; Preston Run; Mineral Hill; Middletown 

 Barrens; Williamson; Lenni; Wawa. 



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

 Brinton's Quarry; Unionville. 



20S. Antennaria neodioica Greene. 



Local on chy open barren. 

 Chester. — West Chester. 



209. Axtexxaria neglecta Greene. 



Frequent on dry open barren. 



Delaware. — Williamson ; Wawa. 



Chester. — Sugartown Barrens ; Unionville. 



210. Antennaria plantaginifolia (L.) Richards. 



Frequent on dry open barren or in woodland. 



Delaware. — Fawkes Run; Mineral Hill; Wawa. 



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



211. Gnaphalium polycephalum Michx. 



Frequent on dry open barren. 



Delaware. — Fawkes Run; Preston Run; Williamson. 



Chester. — West Chester; Unionville. 



|212. Heliopsis helianthoides (L.) Sweet. 



Frequent in Serpentine swamp. 



Delaware. — Williamson. 



Chester. — West Chester; Brinton's Quarry. 



— Nottingham Barrens. 



f213. Helianthus giganteus L. 



Common in moist depressions, greenbrier thickets, or on banks. 

 Delaware. — Mineral Hill; Middletown Barrens; Williamson; Wawa. 

 Chester. — Cedar Barrens; West Chester; Unionville. 



— Nottingham Barrens. 



214. Helianthus divabicatus L. 



Local or frequent on dry open barren or banks. 

 Delaware. — Williamson. 



[215. SENECIO BALSAMIT.E Mllhl. 



Common on dry open barren. 



