GENERA AND SPECIES. 55 
PLATE XIV. 
ASPLENIUM PINNATIFIDUM. Nuttall. 
This species is the most unattractive of the whole genus. 
The first and second pinnules of the fronds are sometimes 
pinnate, the entire frond is generally pinnatifid, the ex- 
tremity slightly inclined to taper into a slender prolonga- 
tion, somewhat similar to that of the Walking-leaf Fern, 
though not to such an extent. I have never found any 
plants of this species rooting at the apex, as in the case 
of the Walking-leaf. In some localities the fronds are 
very short and blunt, and quite unlike the normal type. 
This fern seems to frequent the neighborhood of sand- 
stone cliffs. It is quite plentiful in Rockcastle, Laurel 
(Miss Rule), Estill, Boone, and Grayson counties; at 
Rough Creek, Hardin County; in Edmonson and adjoin- 
ing counties, distributed throughout the cliff-limestone re- 
gions of Kentucky, and in Carter County, in the north- 
eastern part of the State (Hussey). 
This fern can not be cultivated successfully in mounds, 
on rock-work, or in the Wardian case. 
The Plate represents a plant of natural size. 
