viminalis - Osier
Here are two pictures of Salix viminalis, Osier showing
the growth to July.
Picture of Salix viminalis
Close up picture of Salix viminalis
JPR Environmental is happy for you to download and
copy these images for your own use should you want. However,
we would ask you to credit us as the source of the image.
Salix viminalis is a tall shrub or small
tree which usually grows to between 3 and 6 metres in height. Its
erect or suberect branches usually form a rather narrow, truncate
or rounded crown. The bark is greyish-brown and fissured and twigs
are long and straight, very tough and flexible and at first ashy-pubescent
becoming smooth and a lustrous yellowish-brown later.
Osier leaves are linear or narrowly linear-lanceolate,
between 10-15cm long and 0.5-1.5cm wide, and are dull green and
thinly puberulous above and silvery below.
Catkins appear before the leaves in late February,
March or early April and are generally crowded towards the tips
of twigs. They are yellow, between 1.5-3cm long and 0.5-1cm wide
and are densely flowered.
Salix viminalis can be easily identified
in winter because of its early flowering at a time when the landscape
is otherwise devoid of colour. Osier is common everywhere in Britain
and Ireland but seldom seen except at low altitudes. It is one of
the least variable of willows but will hybridize with other willows.
The hybrid with Salix triandra provides a link between the
willows of the Salix fragilis group and the Sallows.
to Willow Tree Varieties