Aspidium Lonchitis, (L.) Sw. Woodsia hyperborea, (Sw.) RB. Br. 
= aculeatum, (L.) Sw. gene. or? 
‘«  filiz-mas, (L.) Sw. - flvensis, (L.) R. Br. 
‘“ fragrans, (1.) Sw. ey Oregana, D. C. E. 
** _spinulosum, Sw Botrychium Lunaria, (L.) Sw. 
Scolopendrium vulgare, Sm. a matricariefolium, A. Br. 
Asplenium viride, Huds. * * lanceolatum, (Gm.) Angst. 
septentriona/e, L. = simplex, Hitche. 
Peliea itis, (Mx.) Hk. : std boreale, Milde. 
Lomaria Spicant, (L.) Dest. 
Of the species here grouped, we note that Phegopteris alpestris 
has only been observed in North America upon the western coast— 
coming down as far as California, according to Mr. Baker—and 
upon the coast of Greenland. Aspidium filix-mas, so abundant in 
the old world, is very restricted upon this continient. It is occa- 
sionally found in Canada and near Lake Superior, and occurs rarely 
in the Rocky Mountains. Aspidiwm aculeatum—so widespread in 
some of: its forms—is local upon our continent, and has not been 
seen below about 4% degrees. Scolopendrium, so abundant in Great 
Britain, is still more restricted here, and seems confined to a few 
rocky glens which open into the ancient basin of the great Jakes. 
Asplenium septentrionale, widely distributed in the mountains and 
colder portions of Europe and Asia, has on our continent been seen 
only in the Rocky Mountains, where it reaches as far south as lati- 
tude 32 degrees. Aspleniwm viride does not penetrate the United 
States, nor is Woodsia hyperborea represented with us, unless W. 
ylabella be viewed as a variety of it. Woodsea Oregana might 
perhaps be ranked with the Pacific or Rocky Mountain species, but 
as it has been noticed as far eastward as Lake Superior, it may 
claim place with the boreal species, though restricted to the new 
world, so far as known. Cystopteris montana, a high northern 
species of the old world, has been seen in Alaska, also far north 
in the Rocky Mountains, and on the north of Lake Superior, and 
in Labrador; while Cystopteris frayilis is so widespread on the 
globe, as almost to deserve a place in our first division, and were it 
not for its northern proclivities might be called an Appalachian 
species. Pellea gracilis would be an exclusively American form, 
but for the fact that it occurs in the Himalaya Mountains, where 
several other of our American species aiso appear. Lomaria 
Spicant, common in the northern regions of the old world, appears 
only on our western border. Botrychium Lunaria, frequent 
throughout northern Europe and not rare in British America, 
barely enters our own boundaries, but the other Botrychia of this 
group have nearly all been occasionally found within our limits, 
and are perhaps more abundant than is supposed, their small 
size and isolated habit enabling them to elude detection. Chei- 
lanthes argentea is a Siberian species which reaches the Aleutian 
islands, and perhaps Alaska, and so must be included in our list. 
Ill. Appatacuian: extending throughout the mountain and 
hilly regions of the States east of the Mississippi, often to the 
coast, and northward into Canada, and in a few instances also in- 
habiting the old world. ae oe 
Polypodium vulgare,L. Aspidium ; 
: é “+ marginale, Sw. 
Gree iy dy MORNE ide, 
