Atlas Of Ferns Of The British Isles

EQUISETACEAE 15
0
6
5
0
7.1x r
EQUISETUM
X MOORE!
®EQUISETUM
RAMOSISSIMUM
GUNNEL ISLANDS
PLOTTED ON 0
UTM GRID
Adorns/NA
Was
9
100
tz)
7.1 x r. Equisetum x moorei Newm.
(E.hyemale x ramosissimum Desf.)
0
8
2
1 2
1 2
This sterile taxon has long been treated as a hybrid of the above
species but, in view of its sterility, its distribution in Ireland and
other areas in Europe where E.ramossissimum is absent, this
is highly problematical. It was originally described from
Rockfield, v.c. H20, in 1856; a plant introduced into a garden in
Shere, v.c. 17, (J.E.Lousley, Flora of Surrey: 94; 1976) has
vigorously maintained itself. There are no specimens to
substantiate previous Scottish records (v .c. 88 and 92);
E.hyemale is found in these localities, however (see
3 4
4
9
8
Ni
0
7 5
N2
4
6
5 6
J.G.Duckett & C.N.Page in C.A.Stace (ed.) Hybridization and
the Flora of the British Isles: 99; 1975).
E.ramosissimum, a southern European species, was ftrst
recorded for the British Isles in 1947 when collected on the bank
of the R.Witham, v.c. 53 (see A.H.G.Alston, Watsonia, 1: 149-
153; 1949). Whilst it has maintained itself it has not spread, and
it is believed to have been introduced with soil when the river
wall was being strengthened. It is therefore regarded as an alien
in the British flora.
ckf
6
5
3
2
1
0