Agriculture Reference
In-Depth Information
3
(a)
(b)
Figure 3.2
(a)
Iris pseudacorus
(yellow fl ag) grows only in waterlogged conditions; (b)
Rubus fruticosus
(blackberry) grows in many different conditions
which is found in heathland, woodland, hedgerows
and open fields (Figure 3.2).
In natural communities, a particular environment
will often have a specific group of plants growing
there which are not found together anywhere else,
the plants are said to form
plant associations
. For
example, in a chalk habitat
Ophrys apifera
(bee orchid)
is often found together with
Centaurea scabiosa
(greater knapweed) and
Poterium sanguisorba
(salad burnet). In the very high rainfall acid bogs of
northern Britain and Ireland,
Sphagnum
mosses
and
Eriophorum vaginatum
(cotton grass) are found
together with
Drosera anglica
(sundew) and
Myrtus
gale
(bog myrtle) (Figure 3.3).
(b)
(c)
(a)
Figure 3.3
(a) Bee orchid, found in chalk grassland; (b) cotton grass, found in acid bogs; (c)
Sphagnum
found in
acid bogs