April, 1908.] The Vegetation of Cedar Point 299 



The Andropogon Dune Formation. 

 Facies: Andropogon furcatus. 



Secondary Species: 



Artemisia caudata, Andropogon sco partus, 



Panicum virgatum. 

 The development of this formation on Cedar Point is far in- 

 ferior to its development at Presque Isle. On Cedar Point the 

 formation is usually more or less mixed with the foregoing for- 

 mation, as in parts of Ridge 7, and later passes into the following 

 structure: 



The Toxicodendron Thicket Formation. 



Facies: Toxicodendron pubescens. 



Secondary Species: 



Populus deltoides, Celastrus scandens, 

 Parthenocissus quinquefolia, Rhus aromatica, 



QuercMS velutina, Fraxinus americana, 



Salix amygdaloides, Vitis vulpina, 



Ptelea trtfoliata, Andropogon furcatus, 



Poa compressa, Juniperus virginiana. 



This formation is characterized by several lianas or semi- 

 lianas, which, together with young trees of several species, con- 

 stitute a more or less definite thicket formation above which 

 stand the older cottonwoods. The last named species is here 

 probablv best regarded as a relict of the earlier formations. The 

 Toxicodendron Thicket Formation is best exemplified on Ridges 

 6(l)>nd 6(2), (Moseley). 



The Pimts- Juniperus Forest Formation. 



Facies: Juniperus virginiana, 



'Pinus strobus. 

 Principal Species: Vagnera stellata. 



Secondary Species: 



Quercus velutina, Quercus imbricaria. 



Toxicodendron pubescens, Tilia atnericana, 



Populus deltoides, Fraxinus americana, 



Fraxinus biltmoreana, Salix amygdaloides, 



Platanus occidentalis , Ulmus fulva, 



Opuntia humifusa, Cyperus schweinitzii, 



Celastrus scandens, Rubus procumbens, 



Asclepias tuberosa, Arabis laevigata, 



Prunus serotina, Rhus aromatica, 



Panicum scribnerianum, Smilax herbacea, 

 Equisetum robustum. 



