Sycamore
Acer pseudoplatanus
The common name refers to the unrelated eastern fig
or Ficus sycomorus which has large palm-shaped leaves
too. The scientific one reveals that this tree belongs
to the genus Acer - the maples - while pseudoplatanus
means "false plane". In Latin, acer means
"sharp" as maple wood was good for making
spears.
Easily the largest member of the maple family in Europe,
this large round-topped tree can reach 40m in height
with a 1.5m girth trunk. It is not native to Britain.
Its real home is high ground in southern and central
Europe extending northwards to Paris and east to the
Caucasus.
When and who first introduced sycamore to Britain is
uncertain. It may have been the Romans but it was still
scarce here in the 16th century and has only really
become established over the last 200 years.
The sycamore is hardy in lowland Britain up to about
500m above sea level. It is a tough tree, withstanding
exposure and industrial pollution and salt-laden winds
along the coasts. It is a useful windbreak both round
upland farms and in coastal areas.
In spring, the small pale green flowers hang in clusters.
Along with field maple and limes, sycamore is the only
common tree with insect pollinated flowers and is a
vital source of pollen and nectar for bees.
The bunches of fertilised flowers develop into winged
seeds or "helicopters". When ripe, they spin
away from the parent tree in the autumn wind.
The thick foliage casts a dense summer shade when hordes
of aphids and other flying insects may infest sycamores.
Aphids feeding on the leaves drop large quantities of
honeydew.
Sycamore is a deciduous species - the large palm-shaped
leaves on their long stalks fall off as winter approaches.
Sycamore timber is creamy-white, clean and free from
unpleasant smells or tastes, making it ideal for uses
associated with food. It is widely used for furniture
making and joinery and is excellent for flooring. The
hard, strong timber can be worked to a very smooth finish
but it is not durable out-of-doors without preservative
treatment.
The tarspot fungus, common on the leaves, does no major
damage apart from reducing the photosynthetic area.
The grey-green bark is thin and smooth in young trees,
turning flaky in older ones and is often stripped off
by the alien grey squirrel. Entire trees or tree-tops
are often killed.
Occasional trees produce "wavy-grained" or
"fiddle-back" wood. Very valuable and highly
prized by cabinetmakers and craftworkers, this is reserved
for making the best violins, other musical instruments
and veneers.
Sycamore has naturalised in the British Isles and
is spreading too, particularly in native woodlands.
It regenerates freely from seed, notably in woods where
dog's mercury dominates the ground flora.
Because it is invasive and exotic, sycamore is a controversial
tree which some conservation bodies try to eradicate
where it threatens to take over remnant ancient woodlands.
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