86 
IOWA ACADEMY OF SCIENCES. 
MALVACE^. 
Malva Totundifolia L. About yards, frequent. 
M. sylvestris L. About yards, rare. Also collected by Dr. 
C. C. Parker. 
Ndpcea dioca L. Low sandy soil, very rare. 
Abutilon avicennce Gsertn. Waste ground, frequent. 
Hibiscus trionum L. Waste ground, rare. 
TILIACE^. 
Tilia americana L. Woods, frequent. 
LINAGES. 
Linum sulcatum Riddell. Dry prairies, frequent. 
L. usitatissimum L. Occasionally escaped. 
GERANIACE^. 
Geranium maculatum L. Woods, common. 
G. carolinianum L. Waste ground; only two plants have 
been collected here. 
Oxalis violacea L. Waste ground, etc., abundant. 
0. corniculata L., var. stricta Sav. Woods and waste 
ground, common. 
Impatiens pallida Nutt. Wet shady places, frequent. 
/. fulva Nutt. With the last, frequent. 
PUTACE^. 
Xanthoxylum americanum Mill. Woods, common. 
CELASTRACE^. 
Calastrus scandens L. Wooded river banks, infrequent. 
Euonymus atropurpureus Jacq. Woods, rare. 
RHAMNACE^. 
Ceanothus americanus L. Open woods, common. 
VITACE^. 
Vitis riparia Michx. River banks and low woods, common. 
Ampelopsis quinquefolia Michx. Woods, infrequent. 
SAPINDACE^. 
Acer saccharinum Wang. Woods, common. 
A. saccharinum Wang., var nigrum Torr. and Gray. A single 
tree known in low woods. 
A. dasycarpum Ehrh. River banks, infrequent. 
Negundo aceroides Moench. Low woods, infrequent. 
Staphylea trifolia L. Woods, infrequent. 
