152 IWELFTH ANNUAL REPORT. 



S. sylvalicus, L., var. dig-ymis, Boeck. (S. microcavpus, Presl.) Bulrush. 

 Lapham. Pine county, etc., Upham. 



S. atrovirens, Muhl. Bulrush. 



Common throughout the state. {Mr. Leihern reports in Blua Earth county, besides 

 the type, a variety with the heads less densely clustered than usual, forming a compound 

 panicle.) 



S. polypliyllus, Vahl. Bulrush. 

 Isanti county, UpJiam. South. 



S. lineatus, Michx. Bulrush. 



Blue Earth county, I/6i7jerf/; Minneapolis, Simmons. South. 



S. Eriopliorum, Michx. Wool-Orass. 



Frequent throughout the state, excepting perhaps south westward. Blue Earth 

 county, Leihery; Minneapolis, Simmons, Kassube; Todd county, etc., Upham; lake of 

 the Woods, Dawson, Macoun. [North of lake Superior, Agassiz.] 



ERIOPHORUM, L. Cotton-Grass. 



E. alpinuin, L. Alpine Cotton-Grass. 

 North of lake Superior, Juni. 



E. vaginatiim, L. Sheathed Cotton-Grass. 



Throughout the state, excepting far southward. Blue Earth county, Leiherg; Min- 

 neapolis, Kassuhe; Anoka county, Juni; Chisago county (frequent), Upham. [Manitoba, 

 Macoun. | 



[E. Virginicum, L., doubtless will be found In this state, but has not yet been re- 

 ported. It occurs in Wisconsin, Nebraska and Manitoba.] 



E. polystacliyiim, L. Many-stemmed Cotton-Grass. 



Common, or frequent, through the south half of the state, and perhaps farther north. 

 Anoka county, Juni; Minneapolis, HerricJt, Simmons; Blue Earth county, Leiberg; 

 Emmet county, Iowa (common), Cratty. It has been noted in its var. angustifolium, 

 Gray, at Minneapolis, Kassube, and in Steele county, Upham. 



E. poly.stachyiim, L., var. latifolium. Gray. Cotton-Grass. 



Minneapolis. Upham; and probably extending, with the var. angustifolium, through 

 the south half of the state. 



E. g-racile, Koch, var. pauciuerviuni, Engrelm. Graceful Cotton-Grass, 

 Throughout the state. Chisago county (frequent), and Sherburne county, Upham; 



Minneapolis, Simmons; Blue Earth county, Leiberg. [Manitoba, Macoun; Emmet county, 

 Iowa (rare), Cratty.] 



FIMBRISTYLIS, Vahl. Fimbristylts. 



F. capillaris, Gray. Fimbristylis. 

 Lajiham. Infrequent. South. 



RHYI^CHOSPORA, Vahl. Beak-Rush. 



R. alba, Vahl, Beak-Rush 

 Lapham. Infrequent. South. 



R. capillacea, Torr. Beak-Rush. 



Blue Earth county. Leiberg. Infrequent. South. 



[Cladium mariscoides, Torr., should be looked for in southern Minnesota.] 



