596 FILICES. (FERNS.) 
14. NEPHROLEPIS, Schott. 
Fruit-dots at the ends of the veins, in a series near the margin of the pinnæ. 
Indusium reniform, often broadly so, fixed by the sinus, or by the arcuate base, 
open obliquely toward the margin of the pinne. Fronds pinnate, elongated ; 
the pinnz articulated to the rachis. Veins free, forked from the midrib, their 
apices thickened. 
1. N. exaltata, Schott. Fronds linear, indefinitely elongated, unfolding 
numerous pinnzs, which are oblong-lanceolate, auriculate on the upper side of 
the base, rounded on the lower side, falcate, crenately serrate ; fruit-dots large ; 
indusium reniform or crescent-shaped, the oblique sinus narrow and deep or 
broad and shallow on the same pinnz.— South Florida, Dr. Cooper. — Fronds 
19-6? long, 2' - 3! wide, usually pendent from the trunks of trees. 
15. ONOCLEA, L. 
Fertile fronds contracted, the pinnules strongly revolute and berry-like ; fruit- 
dots on the back of the free veins, with an elevated receptacle ; indusium attached 
partly to the receptacle and partly to the intervenular surface. Sterile fronds 
foliaceous, much taller than the fertile ones. 
1. O. sensibilis, L. Sterile fronds on a long smooth stipe, broadly 
deltoid-ovate, pinnatifid almost or quite to the rachis; the divisions lanceolate, 
entire or crenately incised; veins finely reticulated with oblong-hexagonal 
areoles; fertile fronds shorter, bipinnate; pinnæ erect, appressed to the rachis ; 
the pinnules erowded.— Meadows and wet places, Florida to Mississippi, and 
northward. — Rootstock nearly naked, creeping. Fronds varying from four 
inches to three feet in height. 
16. WOODSIA, R. Brown. 
Fruit dots on the back of the veins ; the involucres placed beneath the fruit- 
dot, saucer-shaped or cup-shaped, divided into irregular lobes or à delicate 
fringe, or sub-globose and contracted at the mouth. Small Ferns with many 
fronds from a short scaly rootstock. 
* Involucre fringed, the hair-like divisions incurved on the sporangia. _ 
1. W. Ilvensis, R. Brown. Fronds sparingly hairy above, villous be- 
neath and on the stipe and rachis with brown hairs and narrow chaff, lanceolate, 
pinnate; pinnæ ovate-oblong, deeply pinnatifid, the divisions oblong, obtuse, . 
entire or crenate. Fruit-dots envéloped in the fringe of the involucre. — 
: slong the Alleghany Mouttsins, and northward.— Fronds 3! - 8' high. 
= T * 3* * Involuere divided into a few irregular ie. 
