P l a t e X L — F ig . i .
P E L LÆ A D EN SA , H o o k e r .
Oregon C liff-B ra k e .
P e l l æ a d e n s a : — Root-stocks rather slender, entangled,
chaffy with very dark narrow scales ; stalks densely tufted, three
to nine inches long, wiry and slender, dark chestnut-brown, dull
or moderately polished ; fronds ovate or triangular-oblong in outline,
one and a half to two and a half inches long, closely tripinnate
; segments linear, three to six lines long, nearly sessile,
sharp-pointed or mucronate, the lower ones distinct, the upper
ones often confluent by a narrowly winged rachis ; fertile fronds
with the segments entire, having the margin narrowly recurved,
and provided with a distinct delicate involucre ; sterile fronds
very rare, the segments broader and sharply serrated, especially
towards their apices.
; densa, H o o k e r , Sp. Fil., ii., p. 150, t. 125, B. — H o o k e r & B a k e r ,
Syn. Fil., p. 149.
Onychium densum, B r a c k e n r id g e , Filices of the U. S. Expl. Exped., p. 120,
t. 13 , f. 2 .— T o r r e y , Pacif. R. Rep., iv., p. 160.
H a b . — Clefts of rocks. Oregon, on the banks of Rogue River,
B r a c k e n r id g e ; near Fort Orford, Gen. A. V. K a u t z , U.S.A. Not rare in
the Sierra of California, at elevations of six thousand to eight thousand
feet, from the Castle Mountains to the Yosemite, B r ew e r , B o la n d e r , Mrs.
A u st in , & c. Also collected at Jackson’s Lake, in Wyoming Territory, by
Hayden’s Expedition.
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