IOWA ACADEMY OF SCIENCE 
95 
ERIGERON L. 
908. Erigeron pulchellus Michx. Robin’s Plantain. Common in rich 
woodlands. 
909. Erigeron philadelphicus L. Philadelphia Fleabane. Common in 
low woods, thickets' and open places. 
910. Erigeron annuus (L.) Pers. Daisy Fleabane. A common weed 
in open places. 
911. Erigeron ramosus (Walt) BSP. Fleabane. Common in fields 
and open places. 
912. Erigeron canadensis L. Horse Weed. Abundant in waste places 
/ everywhere. 
913. Erigeron divaricatus Michx. Low Horse Weed. Rather scarce in 
open woods and thickets. 
ANTENNARIA Gaertn. 
914. Antennaria plant agini folia (L.) Rich. Mouse-ear Everlasting. 
Abundant in dry woods and thickets. 
915. Antennaria campestris Rydb. Prairie Cat’s Foot. Not uncommon 
on dry hillsides. 
916. Antennaria neglect a Greene. Field Cat’s Foot. Dry fields, woods 
and thickets. 
ANAPHALIS DC. 
917. Anaphalis margariiacea (L.) B. & H. Pearly Everlasting. A 
common weed in thickets and open woods. 
INULA L. 
918. Inula helenium L. Elecampane or Horseheal. Rare along rail- 
way track; Oxford. 
SILPHIUM L. 
919. Silphium laciniatum L. Compass Plant. Common in fields and 
meadows, 
920. Silphium trifoliatum L. Whorled Rosin Weed. Not uncommon 
in dry open places. 
921. Silphium integrifolium Michx. Entire-leaved Rosin Weed. Com- 
mon in dry open places. 
922. Silphium perfoliatum L. Cup-Plant or Indian Cup. Abundant 
in fields and meadows. 
