FLORA OF MITCHELL COUNTY 275 



Ophioglossaceae. 

 BOTRYCHIUM. 



B. virginianum : common in rich woods. 



Equisetacese. 



EQUISETUM. 



E. arvense: Nelson's pasture; common along roadside and rail- 

 road tracks, 



11. hyonalc : Nelson's pasture. 



Taxaceae. 

 TAXUS. 



T. Canadensis : common on the banks of Cedar river. 



Pinaceae. 

 JUNIPERUS. 



/. virginiana : common on banks of Cedar river. 

 /. sabina (/. horisontalis) : found near Rockford, Iowa, by Mah- 

 lon Palmer of Charles City, Iowa. 



Typhaceae. 

 TYPHA. 



T. latifolia : South 7th street, Osage. 



Alismaceae. 

 SAGITTARIA. 



6". latifolia : common around the borders of ponds or bayous. 



Hydrocharitaceae. 

 ELODIA. 



E. canadensis : Spring Park. 



Gramineae. 

 ANDROPOGON. 



A. Scoparius: banks of Cedar river. 



DIGITARIA. 

 D. sanguinalis : common weed. 



PANICUM. 



P. capillarc : common weed. 

 P. Scribnerianum : river road. 



CENCHRUS. 



C. tribuloidcs: sandy banks: railroad track. 



