IOWA ACADEMY OF SCIENCES. 
155 
Prunus virginiana L. 
Geum Virginian um L. 
Rubus villosus Ait. Escaped from cultivation. 
Fragaria vesca L. Escaped from cultivation. 
F. virginiana Mill. 
Potentilla norvegica L . 
P. arguta Pursh. 
P. paradoxa 
■ P. canadensis L. Common in low lands. 
Agrimonia eupatoria L. Woodlands. 
A. parviflora Ait. Woods. 
Crataegus coccinea L. 
C. tomentosa L. 
Rosa arkansana Porter. 
Pyrus coronarialj. 
SAXIFRAGACEAE. 
Ribes gracile Michx. Common in woodlands, and cultivated. 
LYTHRACEAE. 
Ly thrum alatum Pursh. Not very common. 
ONAGRACEAE. 
Gaura biennis L. 
Oenothera biennis L. 
Circaea lutetiana L. Not common. 
CUCURBITACEAE. 
Echinocystis lobata Torr & Gray. 
UMBELLIFERAE. 
Heracleum lanatum Mx. Low prairie. Common. 
Thaspium barbinode Nutt. Banks of streams. 
Sium cicutaefolium Gmelin. Common on lowlands. 
Zizia aurea Koch. Common on lowlands. 
Cicuta maculata L. Common on lowlands. 
Osmorrhiza brevistylis DC. Not uncommon on higher land 
than^preceding. 
O. longistylis D. C. Same habitat as preceding. 
Eryngium yuccaefolium Mx. 
CORNACE^E. 
Cornus paniculata , L’Her. Low thickets. Only tolerably com- 
mon. 
CAPRIFOLIACEjE. 
Sambucus canadensis L. 
Lonicera glauca Hill. (?) 
COMPOSITE. 
Vernonia fasciculata Mx. 
Eupatorium ageratoides L. Rather common in woods. 
