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seven, N. corciifolia, exaltata, acuta, ramosa, altescandens, floc-
cigera and davallioides. The fourth and fifth of these have a
slender wide-creeping root-stock; the rest have a root-stock
much like that of our species.
Concerning the affinities of the genus there has been
some diversity of opinion. Mettenius placed it in Davalliem;
Hooker in Aspidieoe. Fée placed part of it in each of these
two tribes. The character of the indusium, when fully developed,
is clearly Aspidioid, and I see no sufficient reason
for removing the genus to Davalliece.
Plate LX III., Fig. 1-4 . — Neph rolepis exaltata, from Indian River,
Florida. The beginning only of the runners is represented. Fig. 2 is
a pinna, slightly enlarged; Fig. 3 is an indusium, and Fig. 4, a spore.
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P l a t e LX I II . — F i g . 5-8.
POLYPODIUM P LUM U LA , H. B. K.
P lum e P olyp od y .
PoLYPODiuM Plum u l a : — Root-stock rather short, chafïy;
stalks clustered, one to four inches long, slender, wiry, blackened,
ferruginous-puberulent and slightly chaffy, as is the
midrib; fronds three to fifteen inches long, three-fourths to
two and a half inches wide, curled to one side when dry,
narrowly linear-lanceolate, tapering to both ends, pinnatifid
almost to the midrib; segments very numerous, spreading,
five to fifteen lines long, scarcely one line wide, linear from a
base slightly dilated on the upper side,, entire, obtuse, some-
■ what puberulent; midvein blackish; veins concolo'rous, obscure,
mostly once forked, the superior veinlet soriferous; sori minute,
half-way between the midvein and the margin; spores
ovoid reniform, yellowish, the surface minutely pustulated.
Polypodüim Plumula, H u m b o l d t , B o n p l a n d & K u n t it , in Willdenow, Sp.
PL, V ., p . 178; Nov. Gen., i., p. S. — K u n t h , Syn. Pl., i., p.
73. — S c h l e c h t e n d a l , in Linnæa, v., p. 607.— K u k z e , in Linnæa,
xviii., p. 3 1 3 .— B r a c k e n r i d g e , P'il. U. S. Expl. Exped.,
p. I I . — M e t t e n iu s , Polypodium, p. 58. — E a t o n , in Chapman’s
Flora, p. 58S. — H o o k e r , Sp. Fil., iv., p. 200 {in parti) —•
F o u r n i e r , PI. Mex., Crypt., p. 66. — Miss M. C. R e y n o l d s , in
Bot. Gazette, iv., p. 178.
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