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FERNS OF NORTH AMERICA.
P l a t e X VIII.
AD IAN TUM P ED A TUM , L i n n æ u s .
Am e r ic an M aid en -h a ir .
A d i a n t u m p e d a t u m : — Root-stock creeping, scaly, and copi-
oiLsly rooting ; stalks scattered, a foot or more high, dark-brown
and polished, forked at the top ; fronds six to fifteen inches broad,
membranaceous, smooth, spreading nearly horizontally, composed
of several (six to fourteen) slender divisions radiating from the
outer side of the recurved branches of the stalk, and bearing
numerous oblong or triangular-oblong short-stalked pinnules having
the lower margin entire and often slightly concave, the base
parallel with the polished hairlike rachis, the upper margin lobed
or cleft and bearing a few oblong-lunatc or transversely linear
reflexed involucres ; sporangia on the inner surface of the involucres
(as in all Adimita), borne on the extended apices of the free
forking veinlets, which proceed from a principal vein closely
parallel to the lower margin of the pinnule.
Adiantum pedatum, L in næ u s , Sp. Pl., p. 1557. — T h u n b e r g , Flora Japónica,
p. 339. — S w a e t z , Syn. Fil., p. 12 1. — S c h k u h r , Krypt. Gew.,
p. 107, t. 1 1 5 .— W il ld en ow , Sp. Pl., v., p. 438. — M ich a u x , FI. Bor.
Am., ii., p. 263. — P u r sh , FI. Am. Sept., if, p. 670. — T o r r e y , FI.
of N . Y ., ii., p. 487. — G r a y , Manual. — R u pr e ch t , Distrib. Crypt.
Vase, in Imp. Ross., p. 49.— H o o k e r , Sp. Fil., ii., p. 28. — B r a c k e
n r id g e , Filices of the U. S. Expl. Exped., p. too. — E aton, in
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