Wheeler: FLORA OF soutjieastern Minnesota. 369 



Sanicula gregaria, Thalesia uniflora^ 



Sagittaria ctineata, Woodsia oregana. 



Soli dago erect a, 



Catalog of species collected. 



The following catalog of plants contains only those collected by 

 Mr. H. L. Lyon and the writer in the southeastern part of 

 Houston county. With the exception of about ten species 

 which were collected in Brownsville, they were all gathered in 

 the townships of Mayville, Crooked Creek, Winnebago and 

 Jefferson. 



The determinations were almost entirely made by the col- 

 lectors, each determining the plants of his own collection. The 

 determinations of the species of Physalis were kindly made by 

 Mr. P. A. Rydberg, of Columbia University, and those of 

 ^lercus prijioidcs, vclntina, coccinea and ruhra^ and Betula 

 lent a by Professor C. S. Sargent. 



The nomenclature is that of Britton and Brown's Illustrated 

 Flora of the Northern United States and Canada. 



PTERIDOPHYTA. 



OPHIOGLOSSACEJE. 



Botrychium virginianum (L.) Sw\ Schrad. Journ. Bot. 2: 

 III. 1800. 

 Coll.: Lyon 38, Winnebago; 207, Mayville. June, July. 

 Infrequent, rich woods and shady banks. 



OSMUNDACEiE. 



Osmunda claytoniana L. Sp. PI. 1066. 1753. 

 Coll. : Lyon 43, Winnebago. June. 

 Common, shady hillsides and ravines. 



POLYPODIACE^. 



Onoclea sensibilis L. Sp. PI. 1062. 1753. 

 Coll. : Lyon 326, Jefferson. Aug. 

 Common, wet meadows and river bottoms. 

 Onoclea struthiopteris (L.) HoFFM. Deutsch. Fl. 2 : 11. 1795. 

 Coll. : Lyon 79, Winnebago; 208, Mayville. June, July. 

 Common, moist thickets and river bottoms. 



