NOTES ON THE AQUATIC PHENOGAMS OF IOWA, j^q 



Iowa. 30: Hitchcock. Ames FL, 522; Macmillan, Metas. 

 Minn. VaL, 133. 



Proliferous like the rest of our Lcmnacccc. the flowers and 

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

 two following. 



Ames and Iowa City. Hitchcock; Marshalltown, Stewart; 

 Muscatine. Reppert: Linn county, Shimek; Ames (near the 

 var. orbiculata Austin ), Bessey. 



2. L. trisulca Linn. Spec. PL. 970 (i753 • 



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 count v. Cratty; Iowa City and Cedar Rapids. Mac- 

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

 Hitchcock : Muscatine. Reppert : Hancock county, Shimek . 



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

 Spirodela polyrrhiza Schleid. Linnet. 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. Rep-pert: Spirit Lake, Hitchcock : Ames, Arthur: 

 Decorah. Holway; Cedar Rapids and Iowa City, Macbride; 



Emmet county, Cratty : Winnebago county, Shimek. 



Note. — L. ferfustlla Torr , FI. N. Y., II., 245 (1843), should be looked 

 for in the ea-tern part of the state. 



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



1. W. brasiliensis Wcdd. Ann. Sci. Nat. Ser., 3. XII.. 157 



('1849). 



Grantia brasiliensis (Wedd.) Macmillan, Metas. Minn. 



VaL. 134 (1892). 



