Shafer : Vascular Flora of x\llegheny County. 125 



* D. cristata (Linnaeus). Crested shield-fern. 



O'Hara Township, swamp, near Poor P'arm, September 20, 1899. 



* D. Goldieana (Hooker). Goldie's fern. 

 ? D. Filix-mas (Linnaeus). Male fern. 



* D. marginalis (Linnaeus). Evergreen wood-fern. 



* D. acrostichoides (Michaux). Christmas fern. 



FILIX Adanson. 

 CYSTOPTERIS Bernhardt 



* F. bulbifera (Linnaeus). Bladder fern. 



* F. fragilis (Linnaeus). Brittle fern. 



ONOCLEA Linnaeus. 



* 0. sensibilis Linnaeus. Sensitive fern. 



§ 0. Struthiopteris (Linnaeus). Ostrich fern. 



WOODSIA R. Brown. 



* W. obtusa Sprengel. Blunt-lobed woodsia. 



DANNST^DTIA Bernhardi. 

 DICKSONIA L'Heritier. 



* D. punctilobula (Michaux). Hay-scented fern. 



OSMUNDACE^ R. Brown. 



ROYAL FERN FAMILY. I-2. 



OSMUNDA Linncsus. 



* 0. regalis (Linnaeus). Royal fern. 



