Atlas Of Ferns Of The British Isles

46 THELYPTERIDACEAE
0
5
18.1
THELYPTERIS
THELYPTEROIDES
subsp.
GLABRA
Marsh Fern
Kdometres
Miles
9
100
1 2 3 4
O
HX
HW N2
6 6
9
8
CHANNEL ISLANDS
PLOT TED ON 0 wv
UTM GRID
100
8
0
2
0
0
18.1 Thelypteris thelypteroides Michx subsp. glabra Holub
(T.palustris Schott)
A widespread northern continental species absent from the
Atlantic seaboard where the annual temperature range is
smaller and winters are relatively warmer. It is becoming rare in
many vice-counties through drainage of mires.
Oft
o
0
0 0
ss
lq)
0
9
8
N1
0
7
4
5 6
00 0
.5
04)
o
o
o
oo ofoo imp
o
0 0
1 2 3 4 5
5
4
3
2