POSTGLACIAL BIOTA OF THE GREAT LAKES REGION 185 



Family Gramineae 

 Oryzopsis asperifolia Michx. 



Family Cyperace.ae 

 Carex paupercula irrigua (Wahlenb.) Fernald. ( = magellanica Man.) 

 Carex species 

 Scirpus species 



DICOTYLEDONEAE 



Family Salicaceae 

 Salix uva-ursi Pursh. 

 Poptdus grandidenlata Michx. 

 " balsamifera L. 



Family Juglandaceae 

 Juglans cinera L. 



Carya cordiformis (Wang.) K. Koch. 

 " glabra (Mill.) Spach.? 



Family Betulaceae 

 Betula lulea Michx. 



" alba L. 

 Alnus species 



Family Fagaceae 

 Fagus grandifolia Ehrh. 

 * Quercus marcyana Penhallow 

 " albaL. 



" rubra ambigua (Michx.) Fernald 

 " phcllos L. 



Family Polygonaceae 

 Oxyria digyna (L.) Hill 



Family Nymphaeceae 

 Brasenia schreheri Gmelin ( = peltala Pursh.) 

 Nymphaea advena Ait. 



Family Ranunculaceae 

 Ranunculus aquatilis capillaceus DC. 



Family Droseraceae 

 Drosera rotundifolia L. 



Family Platanaceae 

 Plalanus occidentalis L. 



Family Rosaceae 

 Polentilla monspeliensis norvegica (L.) Rydb. 

 " tridentata Ait. 

 " anserina L. 

 " canadensis L. 

 Prunus virginiana L. 



Family Leguminosae 

 Trifolium repens L. 



