52 HISTORY OF BRITISH FERNS.
nate, pinnules ovate, acute; sori central. Plate X.
fig. 1.
I. dentata.—Pinnules ovate, obtuse, distinct; sori
marginal.
c. Dickieana.—Pinnules broad, obtuse, overlapping;
sori marginal.
2. C. alpina, Lesvawx. — Pronàs sub-tripinnate, segments
linear. Plate X. fig. 2.
S. C. montana. Link.—Fronds triangular. Plate X IV .
fig. 2.
C. POLYPODIACEÆ § AsPLENIEÆ.
vii. A t h y r iu m , Roth.
1. A. Filix-foemina, Roth.—The only species. Pinnules
flat, linear-oblong. Plate XI.
i. convexum.—Pinnules narrow, distinct, linear,
convex.
c. latifolium.—Pinnules broad ovate, crowded, irregularly
lobed.
d. molle.—Pinnules oblong, flat, decurrent.
e. multifidum.—Pinnæ and frond tasselled at the
apex. Plate XI.
f . crispum-—^Dwarf, irregularly branched, with the
ends tasselled.
TABLE OF SPECIES AND VARIETIES. 53
g. marinnm.—Fronds narrowed to the base, decumbent,
pinnules oblong, rachis winged.
viii. A s p l e n iu m , Linnoeus.
1. A. septentrionale, Hull.— Frond linear-lanceolate,
two-three-cleft. Plate X II. fig. 3.
2. A. germanicum, TTmi.-Fronds linear, alternately
pinnate, pinnæ narrow wedge-shaped; indusium
entire. Plate X III. fig. 3.
3. A. Euta-muraria, Linnoeus.—Fronds bipinnate, pinnules
wedge-shaped at the base ; indusium jagged.
Plate X III. fig. 1.
4. A. viride, Hudson.—Fronds linear, pinnate, rachis
green above. Plate X III. fig. 4.
5. A. Trichomanes, Linnoeus.—Fronds linear, pinnate,
rachis black throughout. Plate X III. fig. 5.
h. incisum.—Pinnæ deeply lobed.
6. A. marinnm, Linnoeus. — Fronds pinnate, rachis
winged. Plate XIV. fig. 1.
7. A. fontanum, L . Brown.—Fronds bipinnate, narrow
lanceolate, rachis winged, smooth. Plate X III.
fig. 2.
8. A. lanceolatum, Hudson.—Fronds bipinnate, broad
lanceolate, rachis not winged, scaly. PL X II. fig. 1.