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Camptosorus rhizophyllus Link. Walking Fern. Common 

 throughout the State, often completely carpeting the rocks. 

 Locally known as "wall link." 



Cheilanthes vestita Sw. Abundant in certain localities. Many 

 of the limestone knobs are crowned with sandstone. On these 

 cliffs, facing south or west, it grows often in company of A. 

 pinnatifidum and A. trichomancs. Williamson mentions it as a 

 rare fern in Kentucky, but there are many cliffs that are com- 

 pletely covered with it. 



Cystopteris fragUis Bern. Brittle Bladder Fern. One of the 

 commonest ferns on limestone cliffs. It is especially abundant 

 at cave entrances. 



Cystopteris bulbifera Bern. Common, especially through the 

 Green river section. 



Dicksonia pilosiuscula Willd. Not uncommon. 



Nephrodium Goldieanum Hook. Not common. I have found 

 magnificent plants in Ohio and Muhlenburg counties. 



Nephrodium marginalc Michx. Marginal Shield Fern. Most 

 abundant in shaded rocky woods. 



Nephrodium noveboracense Desv. New York Fern. Plen- 

 tiful. 



Nephrodium thclypteris Desv. Marsh Fern. Fairly com- 

 mon in suitable situations. 



Nephrodium spinulosum Desv. The most common fern in 

 sandstone regions. 



Onoclea scnsibilis L. Sensitive Fern. Common. Com- 

 monly called Oak Fern. 



Phegopteris hexagonoptcra Fee. Broad Beech Fern. Widely 

 distributed throughout the State. 



Polypodium vulgare L. Common Polypody. Not very com 

 mon, though found nearly throughout the State. 



Polypodium incanum Sw. Gray Polypody. More abundant 

 than the preceding, growing upon limestone rocks as well as 

 apon trees and sandstone cliffs. 



