16 



Genera. 



From June 20th to July 



Common Names. 



Potamogeton heterophyllus, Pondweed. 

 fluitans, " 



1st. 



Natural Orders. 

 Naiadaceae. 



Zostcra marina, 

 Ruppia maritima, 

 Ilex laevigata, 



opaca, 



verticillata, 



glabra, 

 Silene inflata, 



noctiflora, 

 Dicksonia punctilobula, 

 Aspidlum spinulosum, 



var. dilatatum, 



thelypteris, 



noveboracense, 



marginale, 



cristatum, 



acrostichoides, 

 Woodsia obtusa, 

 Asplenium ebeneum, 



tbelypteroides, 



filix-foemina. 



tricbomanes, 

 Pteris aquilina, 

 Adiantum pedatum, 

 Onoclea sensibilis, 

 Woodwardia augustifolia, 



Virginica, 

 Polypodium vulgare, 

 Robinia viscosa, 



pseudacacia, 

 Gleditschia triacanthos, 

 Tilia Americana, 



Europcea, 



Liriodendron tulipifera, 

 Deutsia scabra. 



Eel-grass. 



Ditch-grass. 



Smooth winterberry. 



American holly. 



Black alder. 



Inkberry. 



Bladder campion. 



Night-flowering catchfly. 



Dicksonia. 



Wood-fern. 



Woodsia. 

 Spleenwort. 



Common brake. 

 Maidenhair. 

 Sensitive fern. 

 Woodwardia. 



Polypody. 

 Clammy locust. 

 Common locust. 

 Honey locust. 

 Basswood, or 

 Linden. 



European linden. 

 Tulip tree. 



Aquifoliacese. 



Caryophyllacese. 

 Filices. 



Leguminosse. 



Tiliaceaa. 



Magnoliaceaj. 

 Philadelpheaj. 



