524 PROCEEDINGS OF THE ACADEMY OF [Dec, 



Frequent on dry open barren. With the last, and intergrading 

 with it. 

 Delaware. — Fawkes Run; Bear Hill; Williamson. 

 Chester. — Sugartown Barrens. 



— Nottingham Barrens. 



Insert: 

 45a. Panicularia nervata (Willd.) Kuntze. 



Common in moist soil, Serpentine swamps. 



Delaware. — Williamson. 



Chester. — Paoli; Serpentine Ridge; Cedar Barrens. 



— Nottingham Barrens. 



*50. Fimbristylis laxa Vahl. Add: 

 Newcastle. — Centerville (A. Commons). 



f51. Scirpus atrovirens Muhl. Add: 

 Chester. — Cedar Barrens; Unionville. 



f54. Scleria pauciflora Muhl. Add: 

 Newcastle.- — Centerville (A. Commons). 



56. Carex lurida Wahl. Read: 



Common in Serpentine swamps. 

 Delaware. — Williamson. 



Chester. — Paoli; Serpentine Ridge; Cedar Barrens; West Chester; 

 Unionville. 



— Nottingham Barrens. 



f57. Carex hystericina Muhl. Read: 



Frequent or local in Serpentine swamps. 

 Delaware. — Williamson. 

 Chester. — Unionville. 



— Nottingham Barrens. 



Insert : 

 f57A. Carex lanuginosa Michx. 



Frequent in Serpentine swamps. 



Delaware. — Williamson. 



Chester.— Serpentine Ridge; West Chester. 



