184 
IOWA ACADEMY OF SCIENCES. 
Pyrus 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. 
Cratcegus coccinea L. Clarke, Adams, Taylor, and Pottawat- 
tamie counties; thickets; common. 
C. crus-galli L. Clarke and Page counties; woods; frequent. 
Amygdalus persica L. Ringgold, Taylor, Page, and Fremont 
counties; waysides; waste places; frequent; an escape from cul- 
tivation. 
Saxifragace^. 
Heucliera liispikla Pursh. Union and Adams counties; prairie; 
frequent. 
Parnassia caroliniana Mx. Johnson county; frequent locally. 
Piibes gracile Mx. Clarke, Union, Adams, Pottawattamie, 
and Fremont counties; woods; common 
R. floridum L’Her. Taylor county; a clump by the wayside. 
Crassulace^. 
PentJiorum sedoides L. Ringgold and Taylor counties; damp 
soils; common. 
Halorage^. 
Myriopliyllum scabratum Mx. Ringgold county; common in a 
lake near Delphos. In Wabonsie slough, in Fremont count3^, a 
deep water form was found that is taken to be this species. 
Callitriclia lieteropliylla 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 C. 
verna L. , of Muscatine county, collected by F. Reppert. 
• Lythrace^. 
Ammannia coccima Rottb. Decatur county; about a dozen 
specimens found on the margin of a railroad pond near Davis 
City. 
Ly thrum alatum 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 flats of a lake near Benton, Ringgold county, 
where it was collected in quantity. 
