Wheeler: FLORA OF SOUTHEASTERN MINNESOTA. 371 



Asplenium filix-fcemina (L.) BERNH. Schrad. Neues Journ. 



Bot. i : Part 2, 26. 1806. 

 Coll. : Lyon 205, 220, Mayville. July. 

 Common woods and thickets. 

 Adiantum pedatum L. Sp. PI. 1095. 1753. 



Coll. : Lyon 45, Winnebago. June. 

 Common, woods and shady banks. 

 Pteris aquilina L. Sp. PI. 1075. 1753. 



Coll. : Lyon 42, Winnebago. June. 

 Common, hillsides and cut-over timber lands. 

 Pellaea stelleri (S. G. GMEL.) WATT, Can. Fil. No. 2. 



1869-70. 



Coll. : Lyon 77, Winnebago. June. 

 Infrequent, moist limestone ledges. 

 Pellaea atropurpurea (L.) LINK, Fil. Hort. Berol. 59. 1841. 



Coll. : Lyon 30, Winnebago. June. 

 Frequent, dry limestone cliffs and boulders. 

 Cheilanthes gracilis (FEE) METT. Abh. Senck. Nat. Gesell. 



3: (reprint 36). 1859. 

 Coll. : Lyon 299, 305, Jefferson. Aug. 

 Rare and local, dry limestone cliff. There is no previous 

 authentic collection of this from Minnesota in the Uni- 

 versity Herbarium. Sandberg's collection from Vermillion 

 lake made in 1885 and reported as this species should be 

 Cheilanthes lanosa (Michx.) Watt, which has not previously 

 been reported from Minnesota. 

 Polypodium vulgare L. Sp. PI. 1085. 1753. 



Coll. : Lyon 76, Winnebago. June. 

 Local on limestone ledge. 



SALVINIACE^:. 



Azolla caroliniana WILLD. Sp. PI. 5: 541. 1810. 



Coll. : Lyon 276, Allamakee Co., Iowa; 298, 444, Jeffer- 

 son. Aug. 

 Abundant on sloughs and lakes of the Mississippi. 



EQUISETACE.E. 



Equisetum arvense L. Sp. PL 1061. 1753. 



Coll. : Lyon 102, Winnebago. June. 

 Frequent, meadows and pastures. 



