Atlas Of Ferns Of The British Isles

92 ASPIDIACEAE
0
7
6
5
0
27.8x7
DRYOPTERIS
X ULIGINOSA
27.8 x2
(DDRYOPTERIS
X BRATHAICA
Kilometres
Miles
9
8 9
CHANNEL ISLANDS
PLOT TED ON Om
UTM GRID
too
(
t;Z)
100
9
8
0 1 2 3 4
2
(
1 2
27.8 x 2 Dryopteris x brathaica Fraser-
Jenkins & Reichstein
(D.carthusiana x jihx-mas; D. x remota sensu
Druce)
This hybrid has been found only once in woods on the N.W. side
of Lake Windermere, v.c. 69; an offset, passed down through
generations of gardeners, is still alive in Oxford University
Botanic Garden and has been cyiologically investigated. It is
intermediate between the parents in the degree of pinnation and
toothing of leaf segments but has the habit of D.ftlix-mas. (See
C.R.Fraser-Jenkins & T.Reichstein, Br. Fern Gaz., 11: 342;
1977, and A.C.Jermy & S.Walker, in C.A.Stace (ed.), loc.cit.:
114.)
3 4
9
N1
7
5
HX
HW N2
4
6
5 6
27.8 x 7 Dryopteris x uliginosa (A.Br. ex
DM) Druce
(D.carthusiana x cristata)
A rare hybrid now confined to Norfolk; when established,
plants show distinct hybrid vigour. Although many former sites
have been lost through drainage it could easily appear wherever
D.cristata grows with D.carthusiana. (See A.C.Jermy &
S.Walker, in C.A.Stace (ed.). loc.cit.: 116).
0
6
5
4
3
2
0