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Plants grown in moist and shady situations are slenderer
and less chaffy, and are sometimes hard to distinguish from
the more chaffy forms of IV. hyperborea.
Pursh describes not only Woodsia hyperborea and IV.
Ihe iisis in his Flora, but Aspidium rufidulum also. Plis
specimens of the first-named are, however, only W. Ilvensis.
Willdenow remarks: — “ Nomen triviale non mulavi, licet
in insula E lb a haud crescai, quum nomina non nisi urgente
necessitate mutanda esse c r e d a m and since Brown adopted
the same specific name in proposing his genus Woodsia, it is
to be hoped that no one will seriously attempt to change it.
Plate LX ., Fig. 5-8. — Woodsia Ilvensis, from near Boston, Massachusetts.
Fig. 6 is an enlarged pinna, the chaff removed. Fig. 7 is
a sorus, and Fig. 8, a spore.
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P l a t e LX. — Fro. 9 - 1 2 .
WOODSIA G L A B E L L A , R . B r o w n .
Smooth Woodsia.
W o o d s i a g l a b e l l a : — Root-stocks short, ascending, clustered;
stalks very slender, seldom an inch long, sparingly
chaffy below the articulation near the base; fronds one to
four inches long, three to six lines wide, linear-lanceolate,
very delicate, smooth, pinnate ; pinnæ one to three lines long,
roundish-ovate, obtuse, crenately lobed into three to seven
short rounded lobes; sori very few; involucres saucer-like,
deeply cleft into a few long incurved filiform rays.
Woodsia glabella, R. B row n, in App. to Frankl. Journ., p. 754 ; Verm.
Bot. Schrift. i., p. 5 2 1 .— H o o k e r , FI. Am.-Bor., ii., p. 259, t.
ccxxxvii; Sp. F il, i., p, 64. — R u p r e c h t , Dist. Crypt. Vase,
in Imp. Ross., p. 5 5 .— G r a y , Manual, ed. i., p. 629; ed. ii.,
,p. 596, t. xii.— M il d e , in Nov. Act. Acad. Nat. Cur., ii., p.
624, t. 43, Fig. 1 0 4 ; Fil. Eur. et Atl., p. 1Ó5. — L aw so n , in
Canad. Nat., i., p. 289.— H oo k er &; B a k e r , Syn. Fil., p. 47
Woodsia alpina, var. glabella, E a to n , in Canad. Nat., ii., p. 89.
H ad. — On moist mossy cliffs in the northern parts of New Hampshire,
Vermont and New York, and from the Saguenay River and
Montmorency Falls (W a t t ) to the Arctic Circle. Alpine and Arctic
Europe, Siberia, Kamtschatka and on the islands near Behring’s Straits.
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