552 PROCEEDINGS OF THE ACADEMY OF [Oct., 



J17. Paxicum anceps Michx. 



Frequent on open grassy border-land. 

 Delaware. — Preston Run; Williamson; Lenni. 



1 18. Panicum depauperatum Muhl. 



Frequent or locally abundant on dry barrens or edges of thickets. 

 Apparently more common in Chester than in Delaware County. 



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

 West Chester; Unionville. 



— Nottingham Barrens. 



fl9. Panicum linearifolium Scribn. 



Known only from the following specimens. 



Delaware.— "Newtown" (B. H. Smith); "Del. Co." (Dr. Geo. 

 Smith). 



20. Panicum dichotomum L. 



Frequent in dry barren or border-woodland. 

 Delaware. — Fawkes Run; Middletown Barrens. 



21. Panicum barbulatum Michx. 



Frequent in dry barren or border-woodland. 

 Delaware. — Fawkes Run; Wawa. 

 Chester. — Cedar Barrens. 



*22. Panicum annulum Ashe. 



Frequent on dry barren banks and edges of thicket. 



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

 Middletown Barrens; Williamson; Lenni; Wawa. 



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

 Unionville. 



— Nottingham Barrens. 



23. Panicum huachuce silvicola Hitchc. and Chase. 



Frequent on dry barrens, and edge of thicket. 



Delaware. — Fawkes Run; Blue Hill; Williamson; Wawa. 



Chester. — West Chester ; Unionville. 



|24. Panicum scribnerianum Nash. 



Frequent on dry open barrens and sandy banks. 



Delaware. — Bear Hill; Blue Hill; Mineral Hill; Williamson; 

 Lenni. 



