IOWA ACADEMY OF SCIENCE 
75 
OENOTHERA L. 
642. Oenothera biennis L. Common Evening Primrose. Common in 
meadows and open places. 
643. Oenothera rhombipetala Nutt. Rhombic Evening Primrose. Not 
rare in sandy soil. 
644. Oenothera lacimata Hill. Sinuate-leaved Evening Primrose. Quite 
common in sandy soils. 
645. Oenothera pratensis (Small) Rob. Sun Drops. Locally plenty 
near Iowa City. 
646. Oenothera serrulata Nutt. Toothed-leaved Primrose. Common 
in dry open places. 
GAURA L. 
647. Gaura parviffora Dougl. Small Flowered Gaura. Not common. 
CIRCAEA (Tourn) L. 
648. Circaea luteiiana L. Enchanter ’s Nightshade. Common in moist 
woodlands. 
649. Circaea intermedia Ehrh. Not uncommon with the above. 
HALORAGIDACEAE. 
MYRIOPHYLLUM (Vaill)'L. 
650. Myriophyllum spicatum L. Spiked Water Milfoil. Not rare in 
bogs and slow streams. 
ARALIACE AE . 
ARALIA (Tourn) L. 
651. Aralia racemosa L. Spikenard. Not scarce in rich woodlands. 
652. Aralia nudicaulis L. Wild Sarsaparilla. Abundant in rich wood- 
lands. 
653. Aralia spinosa L. Hercules Club. Very rare; several specimens 
in cultivation in Iowa City are authentically reported as 
having come from wild stock taken within Johnson County. 
