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mesophytic is shown by the presence of Fagus grandifolia and Acer sac- 
charum, the latter being very abundant. This forest is rather open yand 
this probably accounts for the absence of all ferns. Polypodium is found 
in similar locations in this region, however. Mosses are abundant on the 
ground and on fallen logs. The only liverwort is Porella, occurring abun- 
dantly on tree trunks near the ground. 
In order to establish the fact that the forest represents the ultimate — 
stage of the succession for this region, a primeval mesophytie forest near 
Williamsburg, Ind., about ten miles distant, was studied and a list of the 
species found there is given below. On this list, those species marked by 
an asterisk occurred also in the forest on the east bluff of the gorge at 
Test’s Mills. A study of the list will lead to the conclusion that the ulti- 
mate stage of the succession has been reached here: 
*Carpinus caroliniana *Carya oyata © 
*Fraxinus americana *Ulmus americana 
*Fagus grandifolia *Ulmus fulva 
*Aesculus glabra *Tilia americana 
*Ostrya virginiana *Quercus alba 
*Cornus florida *I’raxinus quadrangulata 
*Acer saccharum *Celtis occidentalis 
*Carya cordiformis *Quercus rubra 
*Ulmus racemosa Aralia nudicaulis 
*Asimina triloba *Urtica gracilis 
*Morus rubra Polygonum yvirginianum 
*Smilax hispida *Bidens frondosa 
*Psedera quinquefolia Monotropa uniflora 
*Ribes cynosbati Ipifagus virginiana 
*Juniperus communis Smilacina racemos: 
*Vitis vulpina Boehmeria cylindrica 
*Rosa setigera *Aristolochis serpentaria 
Benzoin «stivale Sanguinaria canadensis 
*Rhus toxicodendron *Solanum nigrum 
Celastrus scandens Polygonatum commutatum 
*Menispermum canadense Cryptotzenia canadensis 
*Viburnum prunifolium Actea spicata 
*Sambucus canadensis Viola pubescens 
Mitchella repens Monarda fistulosa 
