603 



O.validaccae 

 117. Oxalis corniculata L. 



In the meadow and open, drier places of the swamp meadow ; 

 occasional. 



Buphorhiaccae 

 ii8. Acalypha lirginica L. 



In the meadow^ and near various thickets ; frequent. 



CallitricJiaceae 



119. Callitriche palustris L. 



Very common (as also the next following species) in the 

 reed swamp and moister parts of the sw-amp meadow in early 

 summer, when water is abundant. 



120. C. heferophylla Pursh 



With C. palustris, the two species often entering mutually 

 into the composition of a compact mat, the whole appearing to 

 the naked eye as a single species. 



Balsainiiiaccae 



121. Iinpaticns biHora Walt. 



In moist, shady spots; occasional. 



Rhainiiaceae 



122. RJiauinus Frangula L. 



Occurring in a thicket, w^est of Glencoe. The finding of 

 this species in an established condition at Skokie Marsh has al- 

 ready been recorded elsewhere (Sherff, '12). Heretofore it has 

 been frequent in cultivation, but our manuals list no place farther 

 west than Ontario for the western limit of its established range. 



Vitaceae 



123. Vitis viilpina L. 



In various thickets of the marsh; frequent. 



Hypericaccae 



124. Hypericum iiuijus (Gray) Britton 



In open spots in the swamp meadow ; frequent. 



125. H. canadense L. 



In similar situations ; frequent. 



