184 IOWA ACADEMY OP SCIENCES. 



Pyi'us coronaria'L. Clarke, Union, Adams, Montgomery, Pot- 

 tawattamie, Ringgold, Page, and Taylor counties; thickets; 

 common. 



P. malus L. Union, Page, Adams, Montgomery, Pottawatta- 

 mie, and Ringgold counties; waysides; frequent; appearing 

 mostly as low shrubs. 



Crataegus coccinea L. Clarke, Adams, Taylor, and Pottawat- 

 tamie counties; thickets; common. 



C. crus-gaUl L. Clarke and Page counties; woods; frequent. 



Amygdalus jiersica L. Ringgold, Taylor, Page, and Fremont 

 counties; waysides; waste places; frequent; an escape from cul- 

 tivation. 



Saxifragace.?!:. 



Heuchera li'ispida Pursh. Union and Adams counties; prairie; 

 frequent. 



Parnassia caroliniana Mx. Johnson county; frequent locally. 



Bibes gracile Mx. Clarke, Union, Adams, Pottawattamie, 

 and Fremont counties; woods; common 



i?. floridum L'Her. Taylor county; a clump by the wayside. 



Crassulace^e. 



Pentliorum sedoides L. Ringgold and Taylor counties; damp 

 soils; common. 



Halorage.e. 



MyriophyUum scabratum Mx. Ringgold county; common in a 

 lake near Delphos. In Wabonsie slough, in Fremont county, a 

 deep water form was found that is taken to be this species. 



CaUitricha heferophy/la Pursh. Decatur county; a few speci- 

 mens found in moist localities. This is a rare plant for Iowa, 

 and even a rare genus. The only other species we have is (,'. 

 verna L., of Muscatine county, collected by F. Reppert. 



Lythrace.'E. 



Ammannia coccinea Rottb. Decatur county; about a dozen 

 specimens found on the margin of a railroad pond near Davis 

 City. 



Lythrum alatnm Pursh. Union, Adams, Montgomery, Ring- 

 gold, Page, Taylor, and Fremont counties; moist soil; com- 

 mon. 



Didiplis linearis Raf . Decatur county; a few specimens on the 

 margin of a railroad pond near Davis City; this species was quite 

 common on mud Hats of a lake near Benton, Ringgold county, 

 where it was collected in quantity. 



