Cors Caron - The Tregaron Bog
Tregaron Bog is one of the few remaining examples of a raised
peat bog in Britain. Lying beside the river Teifi just above the
small market town of Tregaron on the edge of the Cambrian Mountains,
there is now an excellent walk through the heart of the Bog on a
timber decked walkway.
The old railway track to the south of the bog and alongside
the road provides convenient access.
To the side of the track is a lake often with a good
selection of wildfowl
Entering the path through the timber arch, one sees a
number of small lakes
From Tregaron, take the B4323 towards Pontrydfendigaid . At
Maeslyn (see OS map) there is a parking area and an entrance to the
old railway line - now a track extending the entire length of the
bog adjacent to the road. Turning right, you can head towards the
observation tower, which offers bird watching opportunities and fine
views across the bog. Turning left, follow the track past the lake
on your right until you reach the Oak archway at the entrance to the
walkway. From here a circular boardwalk takes you around the bog,
returning to the railway track further to the south.
The Bog Asphodel
is the most colourful flower
of the peat
The boardwalk takes the walker through the
centre of the bog and back to the old railway line
Cladonia portentosa - a
foliose lichen common where
little nitrogen is available in the soil.
A raised bog such as Cors Caron was once the site of a shallow
lake that became filled with vegetation. Its acidic nature was ideal
for the various species of Sphagnum moss which not only increase the
acidity of the water, but which are very absorbent and help to hold the water in
the bog and prevent excessive evaporation. The acid also prevents decomposition, so layer upon layer of
Sphagnum gradually builds up - in this case over some 12,000 years
to produce a shallow dome characteristic of the raised bog.
The acidic and nutrient deficient conditions are suitable for a unique flora with plants
like the Purple Moor Grass dominating the landscape. In places can
also be seen the Cotton Grass, the Bog Asphodel and the carnivorous Sundew.
The Sundew is an insectivorous plant growing in wet
The leaves of the Broad Leaved pondweed can be seen
floating on the surface in small ponds at the start of this
An extensive patch of Bog Asphodels. In November the dried
seed pods are all that remain.
Old folklore thought that if cattle ate the Bog Asphodel, their bones would become
brittle. This is because the Asphodel grows on land lacking in
nutrients such as calcium that are required for strong bones. This
is reflected in the plant's scientific name Narthecium ossifragum.
The Sundew gets its nitrogen from insects that it traps on sticky
hairs on its highly modified leaves.
Growing profusely in many areas of the bog is the lichen
Cladonia. Lichens are unique as they are composed of a relationship
between an alga embedded within the tissues of a fungus. The
Cladonia lichen is closely related to the Reindeer 'Moss'- an
important component of the diet of the reindeer in northern Europe.
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©2006 Rod Attrill