5 0 h isto r y OF BRITISH FERNS.
1. W. ilvensis, B. Brown.— Pinnæ oblong, deeply
lobed. Plate I I I . fig. 2.
Z. W. hyperborea, B. Brown.—Pinnæ bluntly triangular,
lobed. Plate IV. fig. !•
iv . L a s t r e a , Bresl.
1. L, Thelypteris, Fronds pinnate, not glandular
; sori sub-marginal on sub-contracted fronds.
Plate VI. fig. 1.
2. L. Oreopteris, Bresl.— Fronds pinnate, glandular
beneath. Plate VII.
3. L. Filix-mas, Prei^.—Fronds suh-bipinnate or bipinnate,
broadly lanceolate. Plate VIII.
h. incisa.—Larger, pinnules elongate, with deep
serrated incisions.
c. abbreviata. — Smaller, pinnules contracted or
obsolete.
d. multifida.—Pinnæ tasselled at the end. Plate
V III. upper figure.
4. L. rigida, Prei^.—Fronds bipinnate, without spinulose
serratures, glandular. Plate IX. fig. ,1.
5. L. cristata, Pm^.—Fronds pinnate or snb-bipinnate,
narrow linear, pinnules oblong. Plate VI.
fig. 2.
5. H%inosa.-Fronds (fertile) bipinnate at the base
pinnules oblong, acute.
6. L. spmnl„„, F„d.-g„nik lin e» , bipinnate, with
spinulose serratures, scales ovate.
7. L. dilatata P /e ./.-F r o n d s oblong- or ovate-lanceo
ate bi-tri-pinnate, with spinulose serratures
scales lanceolate. Plate IX. fig. 2.
i. collina.-Pinnnles ovate, blunt, bluntly mucro-
nate-serrate.
8. L. fceniaeeii, r n i ,» ._ F ,„ „ d a triangnl», bipi„„ate,
pinnules concave above.
V. P olystichum, Both.
1. P. Lonchitis, P o /i.— Fronds pinnate. Plate IV
fig. 2.
2. p. aedeatnte M . _ P , „ n d bipinnate, pinnnle,
acutely wedge-shaped at the base.
i. lobatum.—Fronds narrower, pinnules nearly all
decurrent. Plate IV. fig. 3.
3. P. angtìate, * „ a n .- p „ n d a 'b ip in n a t e , pinnulea
obtusely angled at the base, stalked. PL V. fig. 2.
h. subtripinnatum.—Pinnules pinnatifid.
VI. Cystopteris, Bernhard!
1. C. fragilis, BernJiardi.- P r o n à s lanceolate, bipin