16 



Genera. 



P o tamo ge ton heterophyllus 



fluitans, 

 Zostera marina, 

 Ruppia maritima, 

 Ilex laevigata, 



opaca, 



verticillata, 



glabra, 

 Silene inflata, 



noctiflora, 

 Dicksonia punctilobula, 

 Aspidium spinulosum, 



var. dilatatum, 



thelypteris, 



noveboracense, 



marginale, 



cristatum, 



acrostichoides, 

 Woodsia obtusa, 

 Asplenium ebeneum, 



thelypteroides, 



filix-fcemina, 



trichomanes, 

 Pteris aquilina, 

 Adiantum pedatnm, 

 Onoclea sensibilis, 

 Woodwardia augustifolia, 



Virginica, 

 Polypodium vulgare, 

 Robinia viscosa, 



pseudacacia, 

 Gleditschia triacanthos, 

 Tilia Americana, 



Europaa, 

 Liriodendron tulipifera, 

 Deutsia scabra. 



From June 20th to July 

 Common Names. 

 Pondweed. 



1st. 



Natural Orders. 

 Naiadaceae. 



Eel-grass. 



Ditch-grass. 



Smooth winterberry. 



American holly. 



Black alder. 



Inkberry. 



Bladder campion. 



Night-flowering catchfiy. 



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. 



Lesruminosse. 



Tiliaceae. 



Magnoliacese. 

 Philadelpheaa. 



