592 FILICES. (FERNS.) — 
rise to new plants. (Asplenium rhizophyllum, Z.) — Shaded rocks on the 
mountains of Georgia, and northward. — Fronds 4/-10! long. 
. 
1L ASPLENIUM, L. 
Fruit-dots oblong or linear, oblique to the midrib, the indusium attached by 
one margin to the mostly free veins, rarely curved, or double and attached to 
both sides of the vein. 
§ 1. ASPLENIUM Pnorzn. — Indusia straight, attached by their whole length 
to the upper side of the vein; rarely some of them double, and placed back to back. 
* Fronds pinnatifid or simply pinnate. 
* 
l. A. pinnatifidum, Nutt. Fronds lanceolate, acuminate, cordate at 
the base, pinnatifid, or below sometimes pinnate, the roundish divisions obtuse, 
crenate or serrate; fruit-dots scattered. — Alleghanies of Alabama, and north- 
ward. — Fronds 3/-6! long. A form with the lowest segment on each side 
elongated horizontally and acuminate, has been found in Alabama by Mr. Beau- 
mont. uod 
2. A. dentatum, L. Fronds linear-oblong, obtuse, pinnate; pinne 
mostly opposite, 8 — 12 pairs on short but distinct stalks, roundish ovate (3" — 4"! 
long), cuneate at the lower side of the base, and truncate at the upper side, cre- 
nate or serrate, obtuse; fruit-dots 6-8 on each pinna, elongated, the one next 
the rachis often double. — Carolina, T'h. Moore, Florida, Binney. — Fertile fronds 
. 4! ~6' high, the stipe as long as the sterile fronds. 
3. A. Trichomanes, L. Stipe and rachis slender, purplish black and 
shining; fronds many from the short rootstock, linear, pinnate; pinns numer- 
ous, minute (2" —3" long), roundish oblong, narrowed at the base and attached 
to a raised point on the rachis; fruit-dots 4-8 on a pinna. (A. melano- 
caulon, Willd.) — Rocks along the Alleghanies, and northward. — Fronds 4'- 
8' high. j 
4. A. ebeneum, Aiton. Stipe and rachis purplish black and shining ; 
fronds linear-lanceolate or spatulate, acuminate, pinnate ; pinnæ numerous, 8e8" 
sile, linear-oblong, auricled on one or both sides of the base, serrate or nearly 
entire, those below the middle of the frond gradually shorter and deflexed ; fruit- 
. dots 10-13 on a pinna. — Florida to Mississippi, and northward. — Fronds 6'- 
18' high, 1' - 3! wide; stipe very short. ; 
. & A. angustifolium, Michx. Fronds tall, lanceolate, pinnate ; pinne 
numerous; the sterile ones lanceolate from a truncato base; the fertile ones nar- 
rower, and bearing 60-80 curved fruit-dots on the upper branches of the pin- 
nate forking veins; indusia thickish, strongly convex. — Rich soil along the 
. mountains, and northward. — Fronds 19-39 high, annual Pinnæ 2/-4' long, 
(o weil o uia kp obey Mese 
