80 AMERICAN FERN JOURNAL 
37a. PrERIDIUM AQUILINUM var. PUBESCENS Underw. 
Our collections show this but once. Dry spruce-birch- 
aspen woods, Silver Islet Harbor, Thunder Cape. It 
is likely an ecological variety produced here under the 
somewhat xerophytic conditions of the thin stony soil 
on an old elevated lake-shore terrace. 
38. CrYPTOGRAMMA AcRosTicHorpES A. Br. A north- 
ern species ranging south to Lakes Superior and Huron 
and to Colorado and California. The only record I 
find for this region is one for Schreiber (Campbell). 
39. CRYPTOGRAMMA STELLERI (Gmel.) Prantl. (Pel- 
laea gracilis Hook.) A local species, mostly on cal- 
careous rocks, Labrador and Alaska south to the northern 
United States. Macoun reports it at and below Kaka- 
beka Falls and under cliffs at Red Rock and Nipigon. 
Our specimens are from: Heron Bay; Nipigon; Little 
Fluor Island; Surprise Lake, Silver Islet, and Tee Bay, 
Thunder Cape; Kakabeka Falls; few, if any, of these 
stations being on limestone. 
40. AsPLENIUM TricHoMANES L. This species was 
reported for “Red Rock, Lake Superior, and westward 
to the Lake of the Woods.”—Macoun. It is certainly 
not common nor widely distributed in the region, for 
it is not in our collections and habitats likely to yield 
the species were examined wherever encountered. 
41. ATHYRIUM THELYPTEROIDES (Michx.) Desv.  (As- 
plenium acrostichoides Sw.) Ranging in rich woods 
from Nova Scotia and Minnesota to Georgia and Mis- 
souri, this species was reported farther north at Current 
og - Port Arthur. 
. ATHYRIUM ANGUsTUM (Willd.) Presl, var. RUBEL- 
tum (Gilbert) Butters. Quite variable but widely 
1 NoTr—After the first draft of this article had been prepared, Mr. 
Weatherby called attention to the possibility of ocacue relations of 
h i of lady ferns from the Lake Superior region to those trea eated 
American Ferns allied to Athyrium Filix-femina.” Rhodora 19: 170-20 
a ee ee Se ee ee a ee 
