GENERA AND SPECIES. 149 
to Mammoth Cave. He has observed that it sends up 
several fronds from the root-stock, “from near the base of 
that of the previous year, especially if the first fronds have 
been destroyed.” He.remarks, also, that the statement 
that it grows in “bogs and meadows” should be modified, 
as he has never found it in such situations, but in rich 
woods. The soil near Glasgow Junction, where it grew, 
was a rather dry, compact clay. It is by no means common 
in the State. Some good specimens of this plant were col- 
lected by Dr. Crosier, near the mouth of Wyandotte Cave, 
in Indiana, five miles from the Ohio River. 
The leaf becomes very much attenuated in drying, and, 
when decolorized, furnishes beautiful objects for the mi- 
croscope. 
Figure 1, a plant, natural size; figure 2, a portion of a 
spike; figure 3, a sporangium; figure 4, a spore; figures 2, 
3, and 4, are magnified views (from Hooker and Bauer). 
