Atlas Of Ferns Of The British Isles

ASPLENIACEAE 63
0
7
6
5
0
8
21.9 x 10
ASPLENIUM
X MURBECKII
21.9 x 7b
ASPLENIUM
X CLERMONTIAE
0 100
CHANNEL ISLANDS
Kdornetres
Mdes
9
PLOT (ED ON 0 wv
UTM GRID r
100
8
9 0
t;;)
9
0
2
1 2
1 2
21.9 x 10 Asplenium x murbeckii DOrfl.
(A .ruta-muraria x septentrionale)
This rare hybrid, seen in recent years only in v.c. 70, can be
confused with A. xalternifolium and from which it can be
distinguished by the narrower teeth on the pinna segments and
the irregular edge of the indusium. (See A.H.G.Alston, loc.
cit.: 137; J.D.Lovis, Br. Fern Gaz., 9: 110-113; 1963; J.D.Lovis
in C.A.Stace (ed.), loc.cit.: I 1 1; 1975).
3
3
7 5
4 5
N2
21.9 x 7b Asplenium X clermontiae Syme
(A.ruta-muraria x trichomanes subsp. quadrivalens)
In view of the abundance of both parents on mortared walls this
is an exceedingly rare hybrid. It was found in 1863 at Newry,
v.c. H38, and has not been recorded since. A plant found in
Levens Park, v.c. 69, tentatively attributed to
A.trichomanesx viride, appears to be this hybrid. (See
A.G.H.Alston, loc.cit.: 137; J.D.Lovis in C.A.Stace (ed.),
loc.cit.: 109; 1975).
4
6
0
6
5
4
3
2
0