PTERIDOPHYTA. 



OPHIOGLOSSACEAE. 



Ophioglossum vulgatum L. Adder's tongue. 



Coastal and Midland Zones; in moist forests; rare. 

 Baltimore County, Pikesville (B. W. Barton). 



Botrychium matricariaefolium A. Br. 



Baltimore County, Towson (C. E. Waters). 



Botrychium ternatum (Thunb.) Sw. Ternate Grape-fern. 



Throughout the state; in forests and open situations; most frequent 



in moist, sandy soil. 

 Garrett County, Thayerville (2051). 



Botrychium dissectum Spreng. 



Baltimore County, near Towson (Robert K. Miller). 



Botrychium virginianum (L.) Sw. 



Throughout the state; in moist forests; frequent. 



Virginia Grape-fern. 



OSMUNDACEAE. 



Osmunda regalis L. Royal Peru. 



Throughout the state; in moist forests, swamps and open wet situations; 



common. 

 Talbot County, Easton (238). 



Osmunda cinnamomea L. Cinnamon Pern. 



Throughout the state; in moist forests, swamps and open wet situations; 

 common. 



Osmunda claytoniana L. Interrupted Fern. 



Infrequent in the Midland Zone, common in the Mountain Zone; in moist 

 forests. 



SCHIZAEACEAE. 



Lygodium palmatum (Bernh.) Sw. 



Anne Arundel County, Millersville (P. H. Friese). 



Climbing Fern. 



POLYPODIACEAE. 



Onoclea sensibilis L. Sensitive Fern. 



Throughout the state; in moist forests, swamps and open wet grounds; 

 common. 



