1910.] NATURAL SCIENCES OP PHILADELPHIA. 567 



130. Linum medium (Planch.) Britton. 



Occasional on dry open barren. 



Delaware. — Wawa. 

 Chester. — West Chester. 



131. Linum floridanum (Planch.) Trel. 



Occasional on dry open barren. 

 Delaware. — Bear Hill. 

 Chester. — Sugartown Barrens. 



132. Polygala verticillata L. 



Occasional on dry open barren. 



Delaware. — Fawkes Run; Preston Run; Wawa. 



Chester. — Sugartown Barrens; West Chester. 



133. Polygala sanguinea L. 



Occasional on dry open barren. 



Chester. — Sugartown Barrens ; Serpentine Ridge. 



134. Polygala senega L. 



One specimen seen. 



Delaware. — "Newtown" (Dr. Geo. Smith). 



135. Rhus copallina L. 



Occasional or local on dry barren. 

 Chester. — Cedar Barrens; West Chester. 

 — Nottingham Barrens. 



136. Rhus glabra L. 



Common about edges of thicket and woodland. 

 Delaware. — Bear Hill; Middletown Barrens; Williamson School 

 (I. A. Keller). 



Chester. — Brinton's Quarry. 



137. Acer rubrum L. 



Common on dry barren, depressions and border-woodland. 

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

 Barrens; Williamson; Wawa. 



Chester. — Sugartown Barrens; Brinton's Quarry. 



138. Ceanothus americanus L. 

 Common on dry barren. 



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

 Barrens; Williamson; Lenni; Wawa. 

 37 



