Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles
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ASPIDIACEAE<br />
0<br />
0<br />
6<br />
5<br />
26.1<br />
POLYSTICHUM<br />
LONCH IT IS<br />
Holly Fern<br />
26.1x 3<br />
OPOLYSTICHUM<br />
X LONCHITIFORME<br />
CHANNEL ISLANDS<br />
PLOT TED ON<br />
UTM GRID<br />
Kilometres<br />
Mies<br />
9<br />
100<br />
9 0<br />
wv<br />
t;Z)<br />
26.1 Polystichum lonchitis (L.) Roth<br />
100<br />
2<br />
9<br />
0<br />
2<br />
1 2<br />
1 2<br />
An arctic-alpine species requiring a base-rich substrate. Some<br />
more southerly sites in limestone grykes are liable to be<br />
destroyed through quarrying. An outstanding adventive record<br />
from a railway bridge in Wellingborough, v.c. 32, has been<br />
verified by Dr Anne Sleep, but is not plotted here.<br />
3<br />
3 4<br />
0 N2<br />
9<br />
8<br />
N1<br />
0<br />
7<br />
4<br />
5 6<br />
4 5 6<br />
26.1 x 3 Polystichum X lonchitiforme<br />
(Halacsy) Becherer<br />
(P.Ionchit is x setiferum)<br />
This hybrid was found in Glenade, v.c. H29, with the parents<br />
and has been confirmed by observing meiosis in the spore<br />
mother cells (A.Sleep, pers. comm.). Without the cytological<br />
confirmation it is virtually impossible to separate from<br />
P. x illyricum (see M .J.P . Scannell , Irish Nat. J., 19: 79; 1977).<br />
co.°<br />
0<br />
77
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