Harshberger : Plant formations of Nockamixon Rocks GG3 



crest of the hill. Here the woods consist of such trees as Qncrais 

 Prinus, Q, coccinea, Q, rubra, Q. alba (rare), Fagus americana 

 [F. grandifolid), Tsuga canadensis, Acer rabmm, Bctnla Icnta, 

 Carya porcina [Hicoria glaWa^, Hamamelts znrgimana, and Vibiir- 

 7ium dentatnm, and in dry rocky situations a facies is formed of 

 red z^A-M'.Jitnipentsvirginiana. Tlie woody vines of these woods 

 are Ampclopsis qtiinqucfoHa, RJius radicans, Vitis Labntsca.^ and 

 Cclastrus scandens, Ceanothns aincricamis^ tlie New Jersey tea, 

 forms pure associations in open places well lighted by the sun. 



Figure 3. Talus slopes, precipitous rocks, and surnmil slopes showing the Decidu- 

 ous Forest Formation. 



Reachinof tlie head of a larfie ravme, the character of the woods 

 chan<!es somewhat, mermn<^ into the cliff-crest vegetation. Promi- 



nent in this transition forest are Qnercus Prinus, Castanca dcntafa 



F 



(the only place where the chestnut is prominent), Qnercus ruhra^ 

 A er Sarcharum, and as secondary species. Hamainelis virginiana. 

 Viburnum aerifoliuni, and the herb Cunila Mariana (C, origan- 

 oides). This is a forest growth which connects the facies of the 



