FreRNs OF GLACIER PARK 103 
open places and in thin woods and thickets the plants 
are small and yellowish green, while in wet shaded local- 
ities they are larger, bright green, and less pubescent. 
Some of the plants in swamps about Lake McDonald 
were over five feet high. In late summer the leaves turn 
yellow or brown. 
Cheilanthes siliquosa Maxon. (Pellaea densa Hook.) 
Rare, apparently; found by the writer only on an open 
slope among loose rocks just above Many Glacier Cha- 
lets; collected by Williams in the Lake McDonald region. 
An unattractive plant, with large loose tufts of brittle 
leaves. 
Cheilanthes gracillima D, C. Eaton. Frequent at mid- 
dle altitudes, on exposed argillite and limestone cliffs, 
forming loose tufts. This species has been reported from 
the Park by Jones as C. Feei Moore. 
Cryptogramma acrostichoides R. Br. Frequent at mid- 
dle altitudes, and occasionally extending above timber 
line; on argillite and limestone cliffs, but most commonly 
found on rock slides, half hidden among the rocks. Al- 
though the plants grow normally in rather dry situations, 
in excessively dry weather they soon shrivel. They us- 
ually form small isolated tufts, which are conspicuous 
because of the absence of other vegetation. 
Cryptogramma Stelleri (Gmel.) Prantl. Occasional 
above timberline, in crevices of wet shaded cliffs. Here 
the plants are small and they never occur in abundance. 
They suggest an immature stage of some larger fern, and 
are likely to be overlooked. The finest display of this 
Species was seen at Baring Falls, near Going-to-the-Sun 
Camp. Here, on the overhanging cliffs, which are kept 
constantly moist from the spray of the falls, there were 
hundreds of large plants, growing in loose moss, associ- 
ated with saxifrages and Mimulus. The plants have a 
pale green, sickly appearance. Some of them were at- 
tacked by a rust, determined by Dr. J. C. Arthur as Hy- 
