Atlas Of Ferns Of The British Isles

40 POLYPODIACEAE
0
7
5
16.2
1 2 3 4
POLYPODIUM N2
INTERJECTUM
Intermediate
Polypody
t?
Kdometres
9
100
1
100
16.2 Polypodium interjectum Shivas
(P.vulgare auct.; P.vulgare L. subsp. prionodes
Rothm.)
\
9 9
8
A sub-Atlantic alloploid species derived from hybridization
of 16.1 and 16.3 having intermediate characters, both
morphological and ecological. Its weak lime requirements are
satisfied in coastal habitats by salt-laden winds and it is often a
common component of mature sand-dune systems. It may also
require a generally higher humidity than P.vulgare.
2
o
.o
Oa:
00
,
8
Ni
0
lix
.J71
7
4
5 6
6 6
9
CNANNEL ISLANDS
PLOT TED ON 0
WV
UTM GRID
8 0
1:5?
1
00
0
SI
:68 o
*I II
0
I.
0:
.8 Is o8 8
o . t (Poo
our :
o
000
0 0 0 0
0 r ::
.04)
1 2 3 4 5 6
5
4
3
2
1
0