and with thick-walled cells.

(1) PINNATIFID SPLEENWORT. _Asplenium pinnatifidum_

Fronds four to six inches long, lanceolate, pinnatifid or pinnate near the
base, tapering above into a slender prolongation. Lobes roundish-ovate, or
the lower pair acuminate. Fruit-dots irregular, numerous. Stipes tufted,
two to four inches long, brownish beneath, green above.

Although this fern, like all the small spleenworts, is heavily fruited,
it is extremely rare. It is found as far north as Sharon, Conn., thence
southward to Georgia, to Arkansas and Missouri. On cliffs and rocks.
Resembles the walking fern, and its tip sometimes takes root.

(2) SCOTT'S SPLEENWORT. _Asplenium ebenoides_

Fronds four to ten inches long, broadly lanceolate, pinnatifid or pinnate
below, tapering to a prolonged and slender apex. Divisions lanceolate from
a broad base. Fruit-dots straight or slightly curved. Stipe and rachis
brown.

[Illustration: Pinnatifid Spleenwort. _Asplenium pinnatifidum_ a, Small
Plants from Harper's Ferry; b, Sori on Young Fronds (From Waters's "Ferns,"
Henry Holt & Co.)]

[Illustration: Scott's Spleenwort. _Asplenium ebenoides_ a, from Virginia;
b, from Alabama; c, from Maryland (From Waters's "Ferns," Henry Holt &
Co.)]

Resembles the last, and like that has been known to root at the tip. It is
a hybrid between the walking fern and the ebony spleenwort, as proved by
Miss Margaret Slosson, and may be looked for in the immediate vicinity of
its parents. It was discovered by R.R. Scott, in 1862, at Manayunk, Pa., a
suburb of Philadelphia, and described by him in the Gardener's Monthly of
September, 1865. Vermont to Alabama, Missouri, and southward. Rare, but
said to be plentiful in a deep ravine near Havana, Ala.

[Illustration: Green Spleenwort. _Asplenium viride_]

(3) GREEN SPLEENWORT. _Asplenium viride_

Fronds two to ten inches long, linear, pinnate, pale green. Pinnae
roundish-ovate, crenate, with indistinct and forking midveins. Stalks
tufted, short, brownish below, green above. Rachis green.

Discovered at Smuggler's Notch, Mt. Mansfield, Vt., by C.G. Pringle in
1876. Found sparingly at Willoughby Lake, high on the cliffs of Mt. Horr.
This rare and delicate little plant bears a rather close resemblance to the
maidenhair spleenwort, which, however, has dark stipes instead of green.

Northern New England, west and northwest on shaded limestone rocks.

[Illustration: Maidenhair Spleenwort. _Asplenium Trichom