IOWA ACADEMY OP SCIENCE 
99 
966 . 
967 . 
968 . 
969 . 
970 . 
971 . 
972 . 
973 . 
974 . 
975 . 
976 . 
977 . 
978 . 
979 . 
980 . 
981 . 
ARTEMISIA L. 
Artemisia canadensis Michx. Canada Wormwood. Common in 
yards and waste places. 
Artemisia dracunculoides Pursh. Linear-leaved Wormwood. Com- 
mon in dry open places. 
Artemisia serrata Nutt. Saw-leaf Mugwort. Not uncommon in 
fields and open woods. 
Artemisia ludoviciana Nutt. Lobed Cud-weed. Common in dry 
fields. 
ERICHTITES Raf. 
Erechtites hieracifolia (L.) Raf. Fire-weed. Common in thickets 
and clearings, 
CACALIA L. 
Cacalia tuberosa Nutt. Tuberous Indian Plantain. Abundant in 
wet meadows and bogs, 
Cacalia at riplici folia L. Pale Indian Plantain. Not uncommon 
in rich woods and occasional in moist open meadows. 
Cacalia reniformis Muhl. Great Ihdian Plantain. Rare in deep 
woodlands; State Quarries. 
SENECIO (Tourn) L. 
Senecio balsamitae Muhl. Balsam Groundsel. Common in moist 
meadows and bogs. 
Senecio aureus L. Golden Ragwort. With the above but less 
common. ‘ 
Senecio plattensis Nutt, Prairie Ragwort. Common in dry sandy 
soils. 
ARCTIUM L. 
Arctium lappa L. Great Burdock. Rather scarce in waste places. 
Arctium minus Bernh. Common Burdock. Much more common 
in similar places. 
CIRSIUM (Tourn) Hill. 
Cirsium lanceolatum (L.) Hill. Common Bur Thistle. Common in 
fields and waste places. 
Cirsium discolor (Muhl.) Spreng. Field Thistle. Common in 
fields and meadows. 
Cirsium altissimum (L.) Spreng. Tall or Roadside Thistle. Com- 
mon in fields, woods and thickets. 
