254 DAVENPORT ACADEMY OF SCIENCES. 



713. E. Peplus, L. 



Muscatine; infrequent. Probably of recent introduction. 



Croton, L. 



714. C. glandulosus,]-.. 



Sandy soil ; common. 



715. C. capita tits, Michx. 



Dry sandy soil ; abundant locally ; West Davenport, islands 

 of the Mississippi, Camp McClellan. 



716. C. Texensis, Muell. 



Front street, Muscatine ; infrequent. 



Acalypha, L. 



717. A. Virgitiica, L. Three-seeded Mercury. 

 Fields, woods and waste places ; common. 



718. A. Virginica, var. gracilens, Muell. 



Dry sandy soil ; frequent and abundant locally. 



URTICACEjE. 



Ulmus, L. Elm. 



719. U.fulva, Michx. Slippery or Red Elm. 

 Woods ; rather uncommon. 



720. U. Americana, L. River or White Elm 

 Along streams ; common. 



Celtis, Tourn. 



721. C occidentalis, L. Hackberry. 

 Woods and river banks ; frequent. 



Cannabis, Tourn. 



722. C. sativa, L. Hemp. 

 Waste places ; common. 



Humulus, L. 



723. //. Litpulus, L. Hop. 



Woods, roadsides, and near dwellings ; infrequent. 



Maclura, Nutt. 



724. M. aurantiaca, Nutt. Osage Orange. 

 Planted as hedge and very sparingly escaped. 



Morus, Tourn. 



725. M. rubra, L. Red Mulberry. 

 Rich woods ; infrequent. 



