CERATOPHYLLACE.E. 

 Ceratophyllum demersum, Linn. 



CALLITRICHACE.E. 



Callitriche verna, Linn. 



EUPHORBIACE^E. 



Euphorbia polygonifolia, Linn. 



Geyeri, Engelm. 



serpyllifolia, Pers. 



glyptosperma, Engelm. 



maculata, Linn. 



hypericifolia, Linn. 



corollata, Linn. 



heterophylla, Linn. 



Cyparissias, Linn. 



commutata, Engelm 

 Acalypha Yirginica, Linn. 



EMPETRACEiE. 



Empetrum nigrum, Linn. 



URTICACE^E. 



Ulmus fulva, Michx. 



Americana, Linn. 



racemosa, Thomas. 

 Celtis occidentalis, Linn. 

 Urtica gracilis, Ait. 



dioica, Linn. 



chamyedryoides, Pursh. 

 Laportea Canadensis, Gaudichaud. 

 Pilea pumila, Gray. 

 Bcehmeria cylindrica, Willd. 

 Parietaria Pennsylvania, Muhl. 

 Cannabis sativa, Linn. 

 Humulus Lupulus, Linn. 



PLATANACE.E. 



Platanus occidentalis, Linn. 



JUGLANDACBJS- 



Juglans cinerea, Linn. 



nigra, Linn, 

 Carya alba, Nutt. 



porcina, Nutt. 



amara, Nutt. 



CUPULIFER^E. 



Quercus alba, Linn. 



obtusiloba, Michx. 

 macrocarpa, Michx. 

 bicolor, Willd. 



Prinus, Linn., var. acuminata, Michx. 

 coccinea, Wang, 

 var. tinctoria, Gray. 



