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142 FERNS OF N O R TH AMERICA.
Blechnum angustifoliuni, W il ld en ow , Sp. Pl., v., p. 414.
Blechnum calophyllum, L an g sd o r f f & F is c h e r , I c. Fil., p. 20, t. 2 3 .—
W il ld en ow , Sp. Pl., v ., p. 4 1 5 . — B r a c k en r id g f ,, P'erns o f U. S.
Expl. Exped., p. 132.
Blechnum stagninum, R z\d d i, Fil. Bras., p. 5 4 , t. 6 2.
Blechnum striatum, R. B rown, Prodr., p. 152. — H o o k e r , Sp. FIL, iii., p.
55. t- 159-
Blcchnopsis scrrulata, P r e s l , Epim. Bot., p. 119.
H a b . — In wet places, chiefly along streams and about ponds, apparently
not rare in the southern part of Florida, M ic h a u x , B u c k l e v , B ums
t e a d , P a lm e r , G a r b e r , etc. West Indies and Central America to Southern
Brazil. Also in Malacca and various parts of Australia.
D e s c r i p t i o n . — The root-stock is hard and woody, at least
when dried. It is from a third to half an inch thick, and creeps
apparently below the surface of the ground, but occasionally rises
at the advancing end. It is covered with fine fuscous-brown
chaffy scales, which also ascend the stalks a short distance. The
stalks are continuous with the root-stock, and arc developed from
the growing extremity, but remain in position while the root-
stock advances a few inches beyond them. They are commonly
more than a foot high, nearly as thick as a writing-quill, smooth,
and very rigid. There is a deep channel extending all along the
anterior side, and continuing along the rachis to the topmost
pinna. The color of the stalks in dried specimens is a palish
fuscous-brown. A section of the stalk shows about five sub-
cylindrical fibro-vascular bundles arranged in a semicircle. The
fronds in the Florida specimens are from a foot to a foot and a
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