240 
IOWA ACADEMY OF SCIENCES. 
Achillea. 
685. A. millefolium L. Prairies and pastures; abun- 
dant. 
Anthemis. 
686. A. cotula L. Waste ground about buildings; 
abundant. 
Chrysanthemum. 
687. C. leucanthemum L. Waste ground; rare. 
Tanaoetum. 
688. T. vulgare L. Sometimes escaped to roadsides. 
Artemisia. 
' 689. A, cauclata Michx. Dry, sandy or rocky soil 
common. 
690. A. dracunculoides Pursh. Waste, sandy ground 
one specimen. 
691. A. biennis Willd. Waste ground, especially about 
houses; common. 
692. A. serrata^yxit. Borders of fields and meadows; 
common. 
693. A. gnaphalodes Nutt. {A. ludoviciana Nutt.) 
Prairies; common. 
Ereohtites. 
694. E. hieraci folia (L.) Baf. Woods; abundant locally. 
Mesadenia. 
695. M. atriplicifolia (L.) Raf. (Cacalia atripHoifolia 
L.) Moist woods; scarce. 
696. M. tuherosa (Nutt.) Brit. (C. tuherosa Nutt.) 
Moist or sometimes dry open ground; common. 
Senecio. 
697. S, aureus L. Wet meadows or dry, sterile hills; 
common. 
698. S. palustris (L.) Hook. Swamps and wet' fields; 
frequent. 
Arctium. 
699. A. lappa L. Abundant; especially about houses. 
