270 
IOWA ACADEMY OF SCIENCES. 
S. integrifolium Michx. Prairies. Not common. 
S. perfoliatum L. Cup-plant. Low grounds. Quite 
common. 
■S. terebinthinaceum L. Prairie Dock. Prairies. Not 
common. 
Ambrosia trifida L. Great Ragweed. Waste places. 
Common. 
A. artemisicefolia L. Roman Wormwood. Hog- weed. 
Roadsides. Common. 
Xanthium canadense Mill. Cocklebur. Fields and waste 
places. Very common on poorly cultivated farms. 
Ileliopsis Ice vis Pers. Woods. Quite common. 
II. scabra Dunal. Prairies; frequent. 
Echinacea angustifolia DC. Purple Cone flower. Prai- 
ries. Quite common. 
Eudbeckia laciniata L. Low woods and bottoms. Com- 
mon. 
E. triloba L. Prairies and open woods. Common. 
E. hirta L. Same as above. 
Lepachys pinnata Torr. & Gray. Prairies; open woods. 
Common. 
j Reliant Inis mollis Lam. Dry grounds; frequent. 
II. grosse-serratus Martens. Low land. Common. 
II. stnimosus L. Borders of woods; frequent. 
H. decapetalus L. Low grounds in bottoms. Common. 
Actinomeris squarrosa Nutt. Woods; frequent. 
Coreopsis palmata Nutt. Prairies and open woods. 
Common. 
C. tripteris L. Tall Coreopsis. Same as above. 
Bidens bipinnata L. Spanish Needles. Wetland. Com- 
mon. 
Ilelenium autumnale L. Sneezeweed. Rich ground; 
frequent 
Achillea millefolium L. Common Yarrow, or Milfoil. 
Fields and open woods. Very common. 
Tanacetum vulgare L. Common Tansy. Waste places; 
escaped from cultivation. 
Artemisia gnaphalodes. Wormwood. Common; waste 
places. 
