Lyon: THE PTERIDOPHYTES OF MINNESOTA. 



253 



Dryopteris marginalis (L.) A. GRAY, Man. 632. 1848. Ever- 

 green wood-fern. 



Reported by Upham, but there are no specimens in the her- 

 barium to verify the report. 



Dryopteris spinulosa (RETZ) KUNTZE, Rev. Gen. PI. 813. 1891. 



Spinulose wood- fern. 

 In woods throughout the state. 

 Herb. : A large collection. 



Dryopteris spinulosa intermedia (MUHL.)UNDERW. Native Ferns, 



Ed. 4, 116. 1893. 

 With the species. 

 Herb. : Several specimens. 

 Dryopteris spinulosa dilatata (HOFFM.) UNDERW. Native Ferns, 



Ed. 4, 116. 1893. 



Herb. : Holzinger, Grand Portage island. 

 Dryopteris boottii (TucK.) UNDERW. Native Ferns, Ed. 4, 117. 



1893. 



Reported from this state by Upham. 

 Herb. : No specimens. 

 Polystichum lonchitis (L.) ROTH. Tentamen Fl. Germ. 3: 71. 



1800. Holly fern. 



Dryopteris lonchitis KUNTZE, Rev. Gen. PI. 813. 1891. 

 Not previously reported from Minnesota. Rare. 

 Herb. : Nelson, Lake Superior. 

 Polystichum acrostichoides (Micnx.) SCHOTT. Gen. Fil. 2 : no. 



4. 1834. Christmas fern. 

 Dryopteris acrostichoides (Micnx.) KUNTZE, Rev. Gen. 



PI. 812. 1891. 



Reported from Minnesota by Upham. 

 Herb. : No specimens. 

 Filixbulbifera(L.) UNDERW. Native Ferns, Ed. 6, 119. 1900. 



Bulblet-fern. 



Cystopteris bulbifera (L.) BERNH. ; Schrad. Neues Journ. 



Bot. i : Part 2, 26. 1806. 



Damp shaded hillsides, preferring rocky slopes. 

 Herb. : Numerous collections. 

 Filix fragilis (L.) UNDERW. Native Ferns, Ed. 6, 119. 1900. 



Brittle fern. 



Cystopteris fragilis (L.) BERNH. ; Schrad. Neues Journ. 

 Bot. I : Part 2, 27. 1806. 



