370 MINNESOTA BOTANICAL STUDIES. 



Woodsia oregana D. C. EATON, Can. Nat. 2 : 90. 1865. 



Coll. : Lyon 306, Jefferson. Aug. 



Rare and local, on brow of river bluff. The only previous 

 collection reported from Minnesota is that from Stillwater 

 by Miss Field. There are no previously collected speci- 

 mens from Minnesota in the Herbarium of the University. 



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



I : Part 2, 26. 1806. 

 Coll. : Lyon 57, Winnebago. June. 

 Common on shaded rocks and limestone ledges. 



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



I : Part 2, 27. 1806. 

 Coll. : Lyon 221, Mayville. July. 

 Frequent in deep woods. 



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



Coll. : Lyon 461, Brownsville. Aug. 

 Common in swamps and wet meadows along Wild Cat creek. 



Dryopteris goldieana (HOOK.) A. GRAY, Man. 631. 1848. 



Coll. : Lyon 203, 222, Mayville. July. 



Rare and local, deep rich woods. The only previous 

 authentic collection in Minnesota is that of Leiberg at Min- 

 neopa falls, Blue Earth County. 



Dryopteris spinulosa (RETZ.) KUNTZE, Rev. Gen. PL 813. 



1891. 



Coll.: Lyon 253^, Mayville. July. 

 Rare and local, deep rich woods. 



Camptosorus rhizophyllus (L.) LINK, Hort. Berol. 2: 69. 



1833- 



Coll. : Lyon 32, 65, Winnebago. June. 

 Infrequent or rare, limestone ledges and boulders. 



Asplenium angustifolium MICHX. Fl. Bor. Am. 2 : 265. 1803. 



Coll. : Lyon 204, 224, Mayville. July. 



Rare, deep rich woods. Not previously reported from 

 Minnesota. 



Asplenium acrostichoides Sw. Schrad. Journ. Bot. 2 : 54. 



1800. 

 Coll.: Lyon 206, 223, Mayville; 318, Jefferson. July 



Aug. 

 Frequent, rich woods and moist thickets. 



