1912.] NATURAL SCIENCES OF PHILADELPHIA. 533 



Insert : 

 158b. Vaccinium cesariense Mackenzie. 11 



Occasional on dry barren or edges of woodland. Leaves quite 

 glabrous on both surfaces. 

 Chester. — Sugartown Barrens. 



159. Vaccinium atrococcum (Gray) Heller. Read: 



Occasional on dry barren or edges of woodland. Leaves pubescent 

 over entire lower surface. Judging by leaf pubescence alone, we 

 have three tall blueberries occasional upon the Serpentine. I have 

 not had opportunity to collect in this habitat flowers or fruit of 

 corymbosum or of ccesariense. 

 Delaware. — Williamson ; Wawa. 



Chester. — Paoli (E. B. Bartram, B. Long); Sugartown Barrens; 

 West Chester. 



161. Vaccinium vacillans Kalm. 



Leaves quite glabrous beneath. Add: 

 Chester. — Nottingham Barrens. 



Insert : 



161a. Vaccinium vacillans crinitum Fernald. 12 



Occasional or local in borders of woodland. Leaves pubescent 

 beneath. 



Chester. — Nottingham Barrens. 



Insert : 

 165a. Gentiana villosa L. 



Dry woodland. Beside the following specimen seen, Dr. Samuel 

 Trimble has mentioned to me finding this species upon the Ser- 

 pentine at Williamson. 



Newcastle. — Centerville (A. Commons). 



166. Asclepias purpurascens L. Add: 



Delaware. — Mineral Hill. 

 Chester. — Paoli. 



*167. Asclepias verticillata L. Add. 

 Newcastle. — Centerville (A. Commons). 



"Torreya, X (1910), 230. 

 uRhodora, XIII (1911), 235. 



