IOWA ACADEMY OF SCIENCES. 
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Brauneria. 
669. B. 'pallida (Nutt.) Brit. {Echinacea angustifolia 
DC.) Dry, open ground; common. 
Helianthus. 
670. H. annuus L. Occasionally escaped. 
671. H. petiolaris Waste ground; rare. 
672. H, scaberrimus Ell. (H. rigidus Desf.) Prairies 
and roadsides; abundant. 
673. H. grosse-serratus Martens. Moist meadows and 
fields; common. 
674. H, strumosus L. Dry banks and thickets; abundant, 
675. H. tuberosus L. Borders of fields and woods; com-' 
mon. 
Coreopsis. 
676. C. tinctoria Nutt. Near railroads; scarce. 
677. G.palmata Nutt. Dry banks and prairies; com- 
mon. 
Bidens. 
678. B. laevis (L.) B. S. P. {B.chrysanthemoidesM.ichx.) 
About swamps and along streams; abundant. 
679. B. connata Muhl. With the preceding; common. 
680. B. frondosa L. Moist, cultivated or waste ground; 
abundant. 
681. B. trichosperma (Michx.) Brit. var. tenuiloba 
(Gray) Brit. {Coreopsis trichosperma Michx. var, 
tenuiloba Gray). Swampy meadows; locally, 
abundant. 
Helbnium . 
682. H. autumnale L. Wet meadows and along 
streams; abundant. 
683. H. tenui folium Nutt. One specimen, in moist, 
sandy ground. 
Dysodia . 
684. D. papposa (Nutt.) Hitch. Roadsides; not gen- 
erally distributed. 
