Atlas Of Ferns Of The British Isles

ASPLENIACEAE
0 1 2 3
o o
21.10x 7a
ASPLENIUM
X ALTERNIFOLIUM
PLOT TED ON
UTM GRID
0 100
1 1
Klionleffes
CHANNEL ISLANDS
Miles
9
9
W V
100
8 8
2
9
N.1
0
N2
7
4
5 6
6 6
5 5
7,7
0 0
1 2 3 4 5 6
21.10 x 7a Asplenium x alternifolium Wulfen
(A .septentrionale x trichomanes subsp. trichomanes)
A hybrid recorded in lime-free rocks from several localities in
Britain where the parents grow together. In the past it has been
over-collected for herbaria. Both the parents are rare in Britain
but, where they are common and growing together on the
European mainland, the hybrid forms freely. It is sterile and
could only be confused with A. x contrei, which has a distinctly
triangular frond. The records for v.c. 69 have not been
confirmed this century. (See J.D.Lovis in C.A.Stace (ed.),
Ioc.cit.: 110;1975; and A.H.G.Alston, loc.cit.: 132).
a
4
3
65
2