IOWA ACADEMY OF SCIENCE 
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CONVOLVULUS (Tourn) L. 
716. Convolvulus sepium L. Great Bindweed. Abundant in moist 
fields and along streams. 
717. Convolvulus arvensis L. Small Bindweed. Sparingly introduced 
along railways; Tiffin. 
CUSCUTA (Tourn) L. 
718. Cuscuta obtusi flora HBK. Dodder. Common on Polygonaeeae, 
etc. 
719. Cuscuta arvensis Beyr. Field Dodder. Not common but occa- 
sional. 
720. Cuscuta cephalanthi Engelm. Button Bush Dodder. Not un- 
common; on tall Compositae. 
721. Cuscuta glomerata Chois. Glomerate Dodder. Very distinct and 
conspicuous on tall Compositae. 
POLEMONIACEAE. 
PHLOX L. 
722. Phlox pilosa L. Wild Phlox. Abundant in rich woodlands and 
meadows. 
723. Phlox divaricata L. Sweet William or Wild Blue Phlox. Abun- 
dant in rich moist woodlands. 
POLEMONIUM (Tourn) L. 
724. Polemonium reptans L. Greek Valerian or Blue Bells. Common 
in rich moist woodlands. 
H YDROPPIYLL ACE AE . 
HYDROPHYLLUM (Tourn) L. 
725. Hydrophyllum virginicum L. Virginia Waterleaf. Very com- 
mon in woods. 
726. Hydrophyllum appendiculatum Michx. Appendaged Waterleaf. 
Abundant in moist rich woodlands. 
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