1910.] NATURAL SCIENCES OF PHILADELPHIA. 571 



1 162. Lysimachia quadrifolia L. 



Frequent on dry border-woodland or open. 

 Chester. — Sugartown Barrens; Cedar Barrens. 



163. DlOSPYROS VIRGINIANA L. 



Occasional or local in woodland. 

 Chester. — West Chester. 



— Nottingham Barrens. 



fl64. Sabbatia angularis (L.) Pursh. 



Frequent on dry open barren, edges of thicket and in moist soil, 

 varying greatly in size according to habitat. 



Delaware. — Preston Run (A. Jahn); Mineral Hill (I. Burk) ; 

 Middletown Barrens ; Wawa. 



Chester. — -Cedar Barrens; West Chester; Brinton's Quarry; Union- 

 ville. 



— Nottingham Barrens. 



165. Gentiana crinita Froel. 



Local, on dry open barren. Plants dwarfed. Flowers small for 

 the species, paler blue. 

 Delaware. — Williamson. 



166. ASCLEPIAS PURPURASCENS L. 



Frequent or local on edge of greenbrier thicket. 

 Delaware. — Williamson. 

 Chester. — Sugartown Barrens. 



*167. ASCLEPIAS VERTICILLATA L. 



Common on diy open barren, ledges of rock, and on banks. 



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

 Middletown Barrens; Williamson; Lenni. 



Chester. — Sugartown Barrens; Serpentine Ridge; Cedar Barrens; 

 West Chester; Sconnelltown ; Brinton's Quarry; Marshallton (B. 

 Long); Unionville. 



— Nottingham Barrens. 



fl68. ACERATES VIRIDIFLORA Ell. 



Local on dry open barren. 

 Delaware. — Williamson ; Lenni. 

 Chester. — Unionville. 



— Nottingham Barrens. 



