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home. Though perhaps oftenest seen on trees, it is recorded
as growing also on rocks, old walls, and even on roofs, as at St.
Augustine, Florida, where a roof was heavily thatched with it.
In Kentucky it grows, as Mr. Williamson tells us, on trees and
on rocks. The West-Virginia station is a very recent discovery,
and is perhaps the most northern of all, being in north latitude
39°. Mr. Mertz writes : “ It is on a high, dry c liff: the fern
grows on the edge of the rock, and down the face for a little
distance, fully exposed to the sun’s rays.”
The scaly Polypodia, with veinlets more or less anastomosed
and forming simple areoles, have been put into a genus
by themselves by Mr. John Smith, and named Lepicyslis. There
are some half-dozen of them, mostly occurring in the warmer
countries of America; but in respect to neither venation nor
the scales can they be separated from the other unquestioned
Polypodia.
Plate XX VI., Fig. 2. — Polypodium incanum. From a Florida speci-
::T
P l a t e X X V I. — F ig . 3 .
POLYPODIUM FA LC A TUM , K e l l o g g .
K e l l o g g ’ s P o l y p o d y .
P o l y p o d i u m f a l c a t u m : — Stalks slender, stramineous
when dried; fronds broadly lanceolate, nine to fifteen inches
long, four to six broad, thin-mcmbranaceous, smooth, pinnatifid
to the midrib; segments numerous, tapering from a dilated
base to a very long and attenuated point, often falcate, sharply
serrate, the lower ones slightly reduced and separated by very
broad sinuses, the upper ones by acute incisions, the terminal
one acuminate; veins with about four free veinlets ; sori medium
sized, nearer the midvein than the margin.
Polypodium falcatum. K ellogg, in Proc. Cal. Acad., i., p. 20 (D e c . 18 5 4 ) .
Polypodium Glycyrrhiza, E aton, in Am. Jour . Sci. and Ar ts, Ju ly , 18 56 ,
p. 138 .
H a b . — On trees, sometimes seen in clefts of rocks, Shoalwater Bay,
Washington Territory, Mr. J . C. S w a n ; near Port Orford, Oregon, General
K a u t z .
D e s c r i p t i o n . — The root-stock I have not seen. Dr. Kellogg
described it as “ compressed tuberculate, one-fourth to one-
cighth inch broad, greenish russet-color, branching laterally, often
covered with scales.” General (then Lieutenant) Kautz noted
that “ the root is used as an emollient and expectorant; the
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