Atlas Of Ferns Of The British Isles

ASPLENIACEAE 59
0
0
5
21.7b
ASPLENIUM
TRICHOMANES
subsp.
QUADRIVALENS
CHANNEL ISLANDS
Kilometres
MiI
9
PLOT TED ON 0 WV
UTM GRID
100
100
0
9
8
9 0
0
2
!,7
1 2 3 4
.0
S
G o
es
o 0
o
sus
*e V
0
o
o
.
§ I
es
0 SiO
somo
141
I 0
sus es
el
68 0008 :
:411 OS
S
0 :
9
8
N1
0
7 5
.
r
1 2 3 4 5 6
21.7b Asplenium trichomanes L. subsp. quadrivalens D.E.Meyer emend. Lovis
In contrast to subsp. trichomanes,subsp. quadrivalensprefers
calcareous sites and becomes widespread on mortared walls in
the wetter parts of the country. It is clear from the number of
specimens of this subspecies determined in herbaria that it is
the conimonest taxon. There would be a tendency, however,
for collectors to take more specimens from walls near roads
than from natural rock faces in the hills.
i
N2
4
6
0