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in British Columbia near the Pend d’Oreille River, Dr. Lyai.i,. First collected
on the Sacramento River, California, and on the banks of streams
in Oregon, by B r a c k e n r id g e , but first described from a few little specimens
collected in the Cascade Mountains of Oregon by D r. N ew b e r ry .
D e s c r i p t i o n .— The species most closely related to this
fern is C. Eatoni, from which it differs by the narrower and
usually less compound fronds, larger and more oval pinnules,
and their nearly or quite smooth upper surface.
The scales of the root-stocks are very narrow, slender-
pointed, and ferruginous-brown with a darker midnerve, which
does not extend to the base of the scales: The scales which
occur rather sparingly along the rachises are long and narrow,
and elegantly ciliated at the base. The tonientum, which is
very dense, is nearly white in very young fronds, but deep
chestnut-brown in mature ones. It seems to be composed
of scales which are so deeply ciliated as to leave no undivided
central portion.
The pinnules are oblong-oval, nearly twice as long as
they are broad. Some of them are partly lobed at the base,
as if the frond were becoming tripinnate, and, indeed the
largest fronds are partly tripinnate.
The involucre is herbaceous, and continuous round the
margin of the pinnules.
The plant figured was collected in Plumas County, California, by
Mrs. R. M. Austin. The details are a pinna seen from above, a pinnule
from beneath, the same denuded and a spore.
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