1910.] NATURAL SCIENCES OF PHILADELPHIA. 557 



*55. SCLERIA PAUCIFLORA CAROLINIAN A (Willd.) Wood. 



One collection seen. 



"Serpentine on West Chester Road" (C. E. Smith). 



J56. Carex lurida Wahl. 



Frequent in Serpentine swamps. 

 Chester.— Serpentine Ridge; Unionville. 

 — Nottingham Barrens. 



57. Carex hystricina Muhl. 



In a moist quarry-hole. 

 Delaware. — Williamson. 



58. Carex triceps hirsuta (Willd.) Bailey. 



Common on dry open Barrens. 



Delaware. — Bear Hill; Mineral Hill; Williamson; Lenni; Wawa. 

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

 Brinton's Quarry; Unionville. 



f59. Carex glaucodea Tuckerm. 



Frequent on dry open barrens. 

 Delaware. — Mineral Hill; Williamson. 



Chester. — Serpentine Ridge (S. S. Van Pelt); Cedar Barrens (S. S. 

 Van Pelt) ; Unionville. 



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



J60. Carex vulpinoidea Michx. 



Frequent in moist soil. 

 Delaware. — Williamson. 

 Chester. — Cedar Barrens. 



f61. Carex retroflexa Muhl. 



Local or frequent on moist depressions or banks. 

 Delaware. — Williamson. 



62. Carex scoparia Schkuhr. 



Frequent on dry barrens. 

 Delaware. — Williamson. 



*63. Carex bicknellii Britton. 



Occasional on dry open barrens. 

 Delaware. — Bear Hill; Williamson. 

 Chester. — Cedar Barrens. 



