IOWA ACADEMY OF SCIENCES. 155 



Prunus virginiana L. 



Geuin virginiantini L. 



Ruhus villosiis Ait. Escaped from cultivation. 



Fragaria vesca L. Escaped from cultivation. 



F. virgifiiafia Mill. 



Potentilla norvegica L. 



P. arguta Pursh. 



P. paradoxa 



P. canadensis L. Common in low lands. 



Agrinionia eupatoria L. Woodlands. 



A. parviflora Ait. Woods. 



Crataegus coccinea L. 



C. tomentosa L. 



Rosa arkafisana Porter. 



Pyrus coro7iaria L. 



SAXIFRAGACEAE. 



Ribes gracile Michx. Common in woodlands, and cultivated. 



LYTHRACEAE. 



Ly thrum alatum Pursh. Not very common. 



ONAGUACEAE. 



Gaura biennis L. 



Oenothera biennis L. 



Circaea Intetiana L. Not common. 



CUCDKBITACEAE. 



Echinocystis lobata Torr & Gray. 



UMBELLIFERAE. 



Heracletim lanatum Mx. Low prairie. Common. 

 Thaspiuni barbinode Nutt. Banks of streams. 

 Sitim cicutaefolium Gmelin. CommoQ on lowlands. 

 Zizia aurea Koch. Common on lowlands. 

 Cicuta maculata L. Common on lowlands. 

 Osmorrhiza brevistylis DC. Not uncommon on higher land 

 thanjpreceding. 



O. longistylis D. C. Same habitat as preceding. 

 Eryngium yuccaefolium Mx, 



CORNACE^. 



Cornus paniculata, L'Her. Low thickets. Only tolerably com- 

 mon. 



CAPRIFOLIAOE^. 



Sambuctis canadensis L. 

 Lonicera glauca Hill. (?) 



COMPOSITE. 



Vernonia fasciculata Mx. 



Eupatorium ageratoides L. Rather common in woods. 



