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106 AMERICAN FERN JOURNAL 
Botrychium virginianum is common in deep shaded 
ravines and along wooded stream courses. 
One small patch of Polypodium vulgare was found at 
King’s sink, southwest of Rolla. So far, it has proven 
the rarest species of the region. 
Adiantum pedatum is widely distributed along the 
base of wooded slopes. 
Pteridium aquilinum has been found both on dry and 
somewhat moist hillsides. 
Cheilanthes Féei is abundant on the dry cliffs of the 
Gasconade dolomite along the Gasconade River. It has 
also been found on the pitted dolomite near Rolla, but 
is seemingly rare. 
Pellaea atropurpurea occurs on rock ledges throughout 
the district. 
Pellaea glabella is common on dolomite, and especially 
so along the north bluffs of Little Piney Creek. It 
grows with Pellaea atropurpurea, but can be distinguished 
at a glance by its lighter green color and the shape of 
the pinnae. 
Asplenium platyneuron is common on outcrops of sand- 
stone and is not at all rare on other rocks. 
Asplenium trichomanes appears to be rather rare and 
has been found only on sandstone. : 
Camptosorus rhizophyllus is found on wet rocks at the 
base of cliffs and along streams. 
Dryopteris marginalis seems to be confined in this 
region to outcrops of sandstone, though future observa- 
tion may prove this wron 
Polystichum acrostichoides, chiefly the incised form, is 
abundant in the same situation as the maidenhair. 
Filix bulbifera grows luxuriantly on wet cliffs about 
four and a half miles west of Rolla and will probably 
be found at other places. 
Filix fragilis, like the cliff brake, occurs on rock ledges 
throughout the region, though in crevices and beneath 
ee ae acs iti is shaded. ' 
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