Nature Notes from Argyll
(and occasionally other places)
Tue 24 Feb 2009 Glen Euchar
A Seil Natural History Group recording walk. We started by
looking at the ash trees beside the River Euchar which had a fine collection of lichens
including the Dice Lichen, Pertusaria pertusa, above left. We then made
our way to a hazelwood which was the main object of our visit. The lichen
on the right above was on one of the hazels; it keys to Pertusaria pertusa but
is obviously not it, as the apothecia are orange-brown when you slice off the
top of the warts that contain them. There are often 2 apothecia per wart,
but not several as with P pertusa. If anyone has a clue what it might be
please let me know.
The wood was rich in Atlantic lichens including the jelly
lichen Collema fasciculare, shown here fruiting prolifically.
The lichen Pannaria conoplea on Hazel and the fungus Exidia
repanda (Birch Jelly Button) on Birch.
The Hazel Gloves fungus was plentiful in the wood; this was a
previously unknown site for it. Hazel Gloves can only grow where the Glue
Fungus (Hymenochaete corrugata) is present. In the centre picture Hazel
Gloves is growing on a detached twig that's stuck to a branch by the Glue
Fungus. The third picture shows the same Hazel Gloves fruitbody in close-up.
Note the authentic glove effect at the bottom!
This is the fruitbody of the Glue Fungus. The surface is
covered with tiny spines, visible under a lens. This gives you the genus
Hymenochaete, and checking the spines under the microscope to see that they are
encrusted gives you the species H corrugata - not that any other H species is
likely in an Atlantic Hazelwood. What you see here is the
reproductive fruitbody, which does not have a glueing effect. The
glueing is done by mycelia which spread within the tree and come to the surface
on suitable branches to which falling twigs then get stuck. The fungus
then grows the familiar black coating across the join, and proceeds to enter the
twig to digest it. In this way it gets all the nourishment in the twig to
itself, without competition from all the fungi that would attack the twig if it had
fallen to the ground.
Wed 4 Mar 2009 Luing
A couple of fungi, the Oyster Mushroom (Pleurotus ostreatus)
from a fallen Rowan branch, and the Leafy Brain Fungus (Tremella foliacea) on
All photos and other content copyright © Carl Farmer