4 PROCEEDINGS MANCHESTER INSTITUTE 



Aspidium Thelypteris (L.) Sw. Common 



noveboracense (L,.) Sw. Common 



marginale (L.) Sw. Common 



Bootii Tuckerm. Common 



cristatum (L,.) Sw. Common 



" var. Clintonianum B.C. Eaton. Occasional 



spinulosum (O. F. Miiller.) Sw. Not common 



" var. intermedium (Muhl.) D. C. Baton. 



Common 



" var. dilatatum (Hoffm.) Hook. Not rare 



Cystopteris fragilis (L.) Bernh. Rather rare 



Woodsia ilvensis (L.) R. Br. Not rare 



obtusa (Sprang.) Torr. Rare 



Dicksonia punctilobula (Michx.) Gray. Common 



Onoclea seiisibilis L,. Common 



" var. obtusilobata (Schkuhr.) Torr. 



Occasional 

 Struthiopteris (Lt.) Hoffm. Of irregular distribution 



Osmundaceae 



Osmunda regalis Iy. Common 



Claytoniaiia L<. Common 



cinnainomea Iv. Common 



" var. frondosa Gray. Occasional 



" var. incisa J. W. Huntington. Occasional 



Ophioglossaceae 



Ophioglossum vulgatum I,. Rare, or rarely seen 



Botrychium simplex K. Hitchcock. Manchester. Rare 

 lanceolatum (Gmel.) Angstroem, 



var. angustisegmeiitum Pease and Moore. 



Rather rare 

 i 



