562 PROCEEDINGS OF THE ACADEMY OF [Oct.,. 



93. QUERCUS PRINUS L. 



Occasional in woodland. 

 Delaware. — Fawkes Rim. 

 Chester. — Sugartown Barrens. 



f94. Quercus prinoides Willd. 



Frequent on dry open barren. 



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

 Williamson. 



Chester. — Cedar Barrens; Unionville. 



— Nottingham Barrens. 



|95. COMANDRA UMBELLATA (L.) Nlltt. 



Frequent or local on dry open barren. 

 Delaware. — Williamson. 

 Chester. — Sugartown Ban-ens. 



f96. Polygonum tenue Michx. 



Common on dry open barren, rock exposures. 



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

 Barrens; Williamson; Lenni; Wawa. 



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

 West Chester; Sconnelltown ; Brinton's Quarry; Unionville. 



— Nottingham Barrens. 



i S i 



*97. Talinum teretifolium Pursh. 



Local on dry open barren, rock-exposures. 



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

 West Chester; Sconnelltown. 

 — Nottingham Barrens. 

 Lancaster. — New Texas (J. J. Carter). 



98. SlLENE STELLATA (L.) Ait. f. 



Frequent on dry edges of greenbrier and rocky places. 

 Delaware.— Middletown Barrens; Williamson; Wawa, 

 Chester. — West Chester; Unionville. 

 — Nottingham Barrens. 



*&* 



*99. Cerastium oblongifolium Torr. [including C. arvense villosum- 

 Hollick and Britton]. 



Abundant on dry open barrens, banks and edges of greenbrier. 



In the material examined I have been unable to detect any constant 



