388 
FILICES. 
Low Layton, Essex, where it is still occasionally found. Not a 
true native. P. VII.] 
[Mr. Newman informs me, on the authority of Mr. W. Wilson, 
that Onoclea seJisibilis is quite naturalized near Warrington.] 
Tribe III. Aspleniea. 
7. Athyrium Roth. 
1. A. Filix-fcemina (Roth) ; frond lanceolate pinnate, pinna? 
linear acute regularly pinnate, pinnules linear-oblong quite di- 
stinct deeply serrate or pinnatifid, segments with 2 or 3 teeth. — 
E. B. 1459 (bad), and A. irriguum Sm. E. B. 2199- Newm. 62. 
— Fronds 1 — 3 or even 4 feet high, very much divided. Midrib of 
the pinnules wavy ; lateral veins forked, the anterior branch bear- 
ing at about its middle the kidneyshaped sorus which at length 
becomes nearly round. — a. frond broad drooping, pinnules flat. 
— /3. convexum ; frond erect rigid rather narrow, pinnules usually 
decurved convex with inflexed margins.- — The Rev. R. T. Bree 
found a curious variety at Trevenna, Cornw., with the pinnules 
laciniate or deeply divided into linear segments, which retains its 
characters in cultivation. Sometimes the pinnules are pinnate 
with toothed divisions. Mr. H. C. Watson found what appears 
to be a starved form of this species in the '* alpine region of Ben 
Aulder, Inverness-shire."- — Wet shady situations. P. VI. VII. 
[2. A. fontanum (Presl) ; frond linear-lanceolate bipinnate, 
pinna? oblong-ovate, pinnules obovate-cuneate with few deep 
sharp teeth. — E. B. 2024. — This plant does not associate well 
with the genus. — Formerly on Amersham church, Bucks. Said 
to have been found by Hudson in Cumberland or Westmoreland. 
P.] E. ? 
8. Asplenium Linn. 
1. A. lanceolatum (Huds.) ; fronds lanceolate doubly pinnate, 
pinnules ovate deeply and sharply toothed or lobed, sori short 
nearly marginal. — E. B. 240. Newm. 66. — Fronds sometimes 
nearly linear and simply pinnate, always narrowed at the base. 
Sori short oblong, ultimately rather confluent into roundish 
masses. — Rocks and walls, rather rare. P. VI. — IX. E. 
2. A. Adiantum-nigrum (L.) ; fronds triangular attenuated 
twice or thrice pinnate, pinna? and pinnules triangular sharply 
toothed, sori elongated central. — E. B. 1950. Newm. 69. — Fronds 
always triangular. Sori 2 or 3 times as long as in the preceding, 
placed near the midrib and ultimately confluent in oblong masses 
often covering the whole under surface of the pinnule. — Rocks 
» and walls. P. VI. — IX. Black Spleenwort. 
3. A. Ruta-muraria (L.) ; fronds bipinnate, pinnules rhomboid- 
