XL CATALOG OF MINNESOTA GRASSES, 



W. A. WHEELER. 



The following catalog of the grasses of Minnesota is a par- 

 tial report of the work done on the Minnesota Botanical Survey 

 during 1902. 



Upham's catalog of the Flora of Minnesota, published in 

 1884, li sts one hundred and thirty-nine species and varieties as 

 occurring within the limits of the state. In the Metaspermae of 

 the Minnesota Valley, published in 1892, Professor Conway 

 MacMillan lists ninety species and varieties indigenous to the 

 drainage basin of the Minnesota river. Other local reports con- 

 tain lists of Minnesota grasses. Most of these lists, however, 

 have been incorporated in the two reports just cited. 



This catalog of one hundred and seventy-eight species and 

 varieties is based mainly upon a redetermination by the writer of 

 all the specimens of Minnesota grasses in the Herbarium of the 

 University of Minnesota. One hundred and thirty-eight species 

 and varieties have been so determined. The reports of the re- 

 maining forty species listed have been taken from previous 

 publications without examination of specimens. Seven of these 

 have been cancelled by corrections in the determination of the 

 specimens cited. Probably others of the forty so listed have 

 also been reported without sufficient evidence or upon incorrect 

 determination, but the specimens are not at hand for compari- 

 son. These have, however, all been listed, and are accompa- 

 nied by notes stating upon what the report is based. 



Twenty-four species not previously reported from the state 

 are listed in this catalog. Some of these were determined from 

 lately-published descriptions, without specimens for compari- 

 son, and are therefore somewhat doubtful. This refers espe- 

 cially to the species of Panicum. Some specimens of Elymus 

 remain undetermined because of insufficient material of recently 

 published species for comparison. 



Synonyms are given where confusion might arise in a com- 

 parison with other Minnesota reports. Herbarium specimens 



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