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IOWA ACADEMY OF SCIENCES. 
545. A. novce-anglice L. Very common; our largest 
flowered species. 
546. A. Icevis L. very common; leaves very smooth, 
and often glaucous. 
547. A. sericeus Vent. Common on dry prairies. A 
very distinct and most beautiful species, with 
silvery leaves and wiry stems. 
548. A. ptarmicoides (Nees.) Torr and Gray. Flowers 
white. Rare; six miles west of Estherville on 
road to Spirit Lake. 
549. A. paniculatus Lam. Common on low prairies, 
the leaves resembling those of the Black Wil- 
low. 
550. A. laterijlorus (L.) Britton. (A. diffusus Ait; A. 
miser Nutt.) Common in open woods. 
551. A. multiflorus Ait. Woods and prairies; very 
common. The flowers, which are very numer- 
ous, are white or tinged with purple. 
Erigeron L. 
552. E. philadelphicus L. Fleabane. Common in low 
ground. 
558. E. ramosus (Walt.) B. S. P. ( E . strigosus Muhl.) 
Frequent on rather dry prairies. 
Leptilon Raf. 
554. L. canadense (L.) Britton. ( Erigeron canadensis L.) 
Horseweed. A very common weed, especially 
in waste places. 
555. L. divaricatam (Michx.) Raf. ( Erigeron divari- 
catum Michx.) Rare on prairies near Arm- 
strong. 
Antennaria Gaertn. Everlasting. 
556. A. campestris Rydberg. Very common on prairies. 
557. A. plantaginifolia (L.) Richards. Open woods. 
Both species sometimes called Indians’ Tobacco. 
Silphium L. 
558. S. perfoliatum L. Indian Cup-plant. Frequent in 
w 7 oods. 
