68 PROCEEDINGS MANCHESTER INSTITUTE 



Polypocliaceaeo 

 Oiioclea seiisibilis, L. . Common. 



StriitliiopteriS; (L.) Hoffm. Concord. Locally abundant. 

 Woodsia Ilveiisis^ (L.) R. Br. Not rare. 



obtusa, (Spreng.) Torr. Hudson. Apparently rare. 



Dicksoiiia piiiictilobiila^ (Michx.) A. Gray. Common. 

 Cystopteris fragilis^ (L.) Bernh. Not common. 



Dryopteris acrosticlioldes^ (Michx.) Kuntze. Common. 



Noveboraceiisis^ ( L.) A. Gray. Common. 



Tlielypteris, ( L.) A. Gray. Common. 



cristata^ ( L.) A. Gray. Common. 



" var. Cliiitoiiiaiia^ (D. C. Eaton) Underw. 



Occasional. 



margiiialis, (L.) A. Gray. Common. 



si>iiiiilosa, (Retz.) Kuntze. The occurence of the typical 



form is not yet established. 



" var. iiiteriiieclia^ (Muhl.) Underw. Common. 



Bootii^ (Tuckerm.) Underw. Common. 



Plieg'opteris Plieg'opteris^ ( L.) Underw. Common. 



liexagoiioptera^ (Michx.) Fee. Less common. 



Dryoi>teris, (L.) Fee. Common. 



Woodwardia Virgiiiica, (L.) J. E. Smith. Locally abun- 

 dant. 



Caniptosorus liiizopliylliis^ (L.) Link. Reported from 



Windham. 



Aspleniiini platyiieuroii, (L.) Oakes. Locally abundant ; 



often called "rock fern." 



