NOTES ON THE AQUATIC PHENOGAMS OF IOWA, j^q 



Iowa. 30: Hitchcock, Ames FL, 522; Mac mill an, Metas. 

 Minn. Val., 133. 



Proliferous like the rest of our Lcniuacdc. the flowers and 

 fruit being rarely seen. In stagnant water; rarer than the 

 two following. 



Ames and Iowa City. Hitchcock: Marshalltown. Stewart; 

 Muscatine. Rcfipcrt : Linn county, Shi nick : Ames I near the 

 var. orbiculata Austin), Bessey. 



2. L. trisulca Linn. Spec. PI.. 970 (1753). 



Wats, and Coult.. Gray's Man.. 6th ed., 552; Arthur, Fl. 

 Iowa, 30; Hitchcock, Ames FL, 522; Upham, Fl. Minn., 135. 



Common throughout the state, floating on stagnant water, 

 among other vegetation, often in dense mats. June, July. 



Emmet county, C ratty ; Iowa City and Cedar Rapids, Mac- 

 bride; Decorah, Holway; Ames, Arthur. Bcsscy: Spirit Lake, 

 Hitchcock ; Muscatine, Rcppcrt ; Hancock county, Shi nick. 



3. L. polyrrhiza Linn. Spec. PL. 970 (1753). 

 Spirodcla polyrrhiza Schleid, Linnese, XIII., 392 (1839). 



Wats, and Coult., Gray's Man., 6th ed.. 552: Arthur, Fl. 

 Iowa. 30: Hitchcock. Ames FL, 521; Macmillan. Metas. 

 Minn. Val.. 134. 



Very common throughout, floating on stagnant .or slow 

 flowing water. July. 



Muscatine. Rcppcrt ; Spirit Lake, Hitchcock : Ames, Arthur; 

 Decorah. Holwav ; Cedar Rapids and Iowa City. Macbride; 

 Emmet county, Cratty; Winnebago count v, Shinick. 



Note. — L. ferpusilla Torr., Fl. N. V., II., 245 (1843), should be looked 

 for in the ea>tern part of the state. 



WOLFFIA HorkcL Linn. XIII., 389 (1839). 



1. W. brasiliensis Wedd. Ann. Sci. Nat. Ser.. 3. XII.. 157 

 (1849). 



Grant ia brasiliensis 1 Wedd.) Macmillan, Metas. Minn. 

 Val., 134 (1892). 



