Lyon: the pteridophytes of Minnesota. .'• 253 



j^ 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 spinulosaintermedia(MuHL.)UNDER\v. 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. 

 v 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 (Michx.) Schott. Gen. Fil. 2 : no. 

 4. 1834. Christmas fern. 

 Dryopteris acrostichoides (Michx.) 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. 1 : Part 2, 26. 1806. 

 Damp shaded hillsides, preferring rocky slopes. 

 3, Herb. : Numerous collections. 

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

 Brittle fern. 

 Cystofiter is fragilis (L.) Bernh. ; Schrad. Neues Journ. 

 Bot. 1 : Part 2, 27. 1806. 



