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40 F E R N S O F NO R TH AM E R IC A .
Counties, Mr. W i l l ia m so n ; Arkansas, near the White River, Professor
F. L. H a r v e y . Specimens of a less developed form were collected on
limerock near Newburg, New York, by Dr. F. J . B um st ead and myself.
■ in 1864.
D e s c r i p t i o n : — This varies a good deal in the shape
of the fronds and in the degree of incision of the pinnæ,
the narrower and less divided forms having some resemblance
to A . ebeneum, and the larger forms looking more
like A . montanum, or the European A . lanceolatum. I f there
could be a hybrid between A . ebeneum and A . montanum, it
would be much like our plant. The stalks are dark and
polished, sometimes almost black, and the color continues up
to the middle part of the frond, except in the smallest specimens.
The fully developed plant has the fronds almost bipinnate,
but differs from A . montanum in having the lowest
pinnæ not larger than the others, in the thinner texture, and
in the shorter stalks of the pinnæ. It will probably prove
to be less rare than is supposed, and to have a wide range,
since the Newburg plant is manifestly identical with that
found by Mr. Williamson in Estill County, Kentucky.
Plate LI., Fig. 4-8. — Asplenium Bradleyi. Three plants from
Walden’s Ridge are represented, showing the variations in form and
cutting. Fig. 7 is an enlarged pinna from the largest frond. Fig. 8,
a spore.
VF I.
F E R N S O F NO R TH AM E R IC A . 4 1
- P l a t e LI. — F ig. 9 - 11.
A S P L E N IU M MONTANUM, W i l l d e n o w .
Mountain Spleenwort.
A s p l e n i u m m o n t a n u m :— Root-stock short, copiously rooting,
chaffy at the apex with dark-fuscous narrow pointed
scales; stalks one to four inches long, somewhat ebeneous
near the base, becoming green higher up, and so passing into
the narrowly winged herbaceous rachis ; fronds sub-coriaceous,
two to four inches long, ovate or lanceolate from a broad
base, pinnate ; pinnæ ovate or ovate-oblong, the lower ones
pinnately cleft into oblong-rhomboid or ovate cut-toothed lobes,
the upper ones gradually simpler; sori short, placed near the
midvein, the lower ones often double; indusia delicate, entire.
Aspieynum montanum, W il ld en ow , Sp. P L , v ., p. 3 4 2 . — P u r s i-i , FI. A m .
Sept., ii., p. 667. — G r a y , Manual, ed. i., p. 627, etc. — M e t t
e n iu s , Asplenium, p. 145 ; t. v., fig. 34, 35. — E a to n , in Chapman’s
Flora, p. 592. — H o o k e r , Sp. Fil., iii., p. 17 7 .— H o o k e r
& B a k e r , Syn. Fil., p. 2 13 . — W il l iam so n , Ferns of Kentucky,
p. 65, t. xviii. — D a v en po r t , Catal, p. 23.
Asplenium Adiantum-nigrum, M ic h a u x , FI. Am.-Bor., ii., p . 26 5 .—
H e u f l e r , Aspl. sp e c ., p. 3 0 0 f a r as concerns the American
p la n l) .