—75— 



keep up a continuous growth during the rest of the year. They 

 do not die down like Cystoptcris, but the foliage is changed 

 gradually. 



LIST OK FERNS FOUND. 



Adiantum pe datum L. American maidenhair. A rare fern 

 here. On the margin of springs in thin but rich soil, or oftener 

 in the water in dense tangled masses. Sparingly fruitful. Have 

 not found it below 1.200 feet. 



Polystichum acrostichoidcs Swz. Christmas fern. Also rare 

 in this locality, growing on moist, shady hillsides, and not very 

 large. 



Polystichum acrostichoidcs var. incisum Gray. The most 

 common fern of the whole Ozark region, growing nearly every- 

 where, under the most varying conditions, but in shady, damp 

 mossy hollows in greatest luxuriance, and of large size. The 

 lower pinnae are often nearly again pinnate, and sori are borne 

 in numbers to the middle of frond, the fertile pinnae often little 

 or not at all modified. It is truly evergreen here. 



Asplcnium cbcncum Ait. Ebony Spleenwort. Common; 

 among mossy stones on shaded hillsides, near springs, sometimes 

 on moist cliffs. 



Asplcnium cbcncum var. incisum Moore. Occurs more fre- 

 quently, and in the same locations as the type — often with it. 



Asplcnium parvulum Mart. & Gale. Little Ebony Spleen- 

 wort. Not at all rare, nor very small, often reaching two feet 

 in length. On mossy rocks, or shaded, moist cliffs. 



Asplenium trichomanes L. Maidenhair Spleenwort. Not 

 rare ; very large and handsome. On mossy rocks in moist, 

 shaded places. 



Asplcnium ruta-muraria L. Wall rue. Very rare. I found 

 one group of plants on a ledge just within the entrance of a 

 limestone cave, where the rocks were constantly moist, and the 

 sun never penetrated. 



