252 



MINNESOTA BOTANICAL STUDIES. 



Upham reports this fern as occurring plentifully at Duluth 

 and throughout the southern half of the state, but rare. 



Herb. : Not represented by specimens. 



Phegopteris dryopteris (L.) FEE, Gen. Fil. 243. 1850-52. 

 Oak-fern. 



Common in northern Minnesota in shaded places. 



Herb. : Numerous collections. 

 Phegopteris robertiana (HOFFM.) A. BR. in Sched. ; Milde 



Filic. Europ. et Atlant. 99. 1867. 

 Phegopteris calcarea FEE, Gen. Fil. 243. 1850-52. 



Reported from Minnesota by D. C. Eaton, Ferns of North 

 America 2: 277. 1880. There are no specimens in the her- 

 barium. 

 Dryopteris noveboracensis (L.) A. GRAY, Man. 630. 1848. 



Found in eastern Minnesota according to Upham's report. 

 There are no specimens in the herbarium. 

 Dryopteris thelypteris (L.) A. GRAY, Man. 630. 1848. Marsh 

 shield-fern. 



Common in marshes throughout the state. 



Herb. : Many specimens. 



Dryopteris fragrans (D.) SCHOTT, Gen. Fil. 1834. Fragrant 

 shield-fern. 



Frequent on rocks in northern Minnesota. 



Herb. : Cheney, Partridge falls, Pigeon river ; Bailey, Bass- 

 wood lake ; MacMillan and Sheldon, Lake of the Woods. 

 Dryopteris cristata (L.) A. GRAY, Man. 631. 1848. Crested 

 shield-fern. 



Frequent in tamarack and spruce swamps. 



Herb. : Aiton, Rice county ; Arthur, Vermilion lake ; Bailey, 

 Mud river; Ballard, Chaska; Butters, Detroit; Sheldon, St. 

 Croix Falls ; Taylor, Center City. 



Dryopteris goldieana (HooK.) A. GRAY, Man. 634. 1848. 

 Goldie's fern. 



In southern Minnesota in rich woods. Quite rare. 



Herb. : Sheldon, Leiberg, Blue Earth county; Lyon, Hous- 

 ton county. 

 Dryopteris filix-mas (L.) SCHOTT\ Gen. Fil. 1834. Male fern. 



Occurring north of lake Superior according to Upham. This 

 fern has probably been overlooked by collectors, being confused 

 with other species. 



Herb. : Sheldon, Minneapolis. 



