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Atlas Of Ferns Of The British Isles

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EQUISETACEAE 21<br />

0<br />

6<br />

5<br />

0<br />

7.4x3<br />

EQUISETUM<br />

X LITORALE<br />

100<br />

1 1<br />

1Gkenstres<br />

OWNS: ISLANDS<br />

PLOT TED ON 0<br />

UTM GRID<br />

Udell<br />

0<br />

100<br />

0<br />

8<br />

9 0<br />

0 2 3 4<br />

0<br />

2<br />

00<br />

0<br />

0<br />

1<br />

e<br />

0<br />

1 2 3 4 5 6<br />

S.<br />

9<br />

8<br />

N1<br />

0<br />

7 5<br />

7.4x 3 Equisetum x litorale Kuhlew. ex Rupr.<br />

(E. arvense xfluviatile)<br />

Considering the dissimilarity of the habitat required by each<br />

parent this hybrid is surprisingly frequent. It is also extremely<br />

variable: in drier habitats specimens often approach E.arvense<br />

and in wet ones E.fluviatile (see J.G.Duckett & C.N.Page, in<br />

C.A.Stace (ed.), loc.cit.: 101; 1975).<br />

4 6<br />

6<br />

5<br />

4<br />

3<br />

2<br />

1<br />

0

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