Nature Notes from Argyll
(and occasionally other places)

Tue 24 Feb 2009 Glen Euchar

Pertusaria pertusa   Unknown lichen, possibly Pertusaria sp.

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.

Collema fasciculare

The wood was rich in Atlantic lichens including the jelly lichen Collema fasciculare, shown here fruiting prolifically.

Pannaria conoplea   Exidia repanda

The lichen Pannaria conoplea on Hazel and the fungus Exidia repanda (Birch Jelly Button) on Birch.

Hypocreopsis rhododendri   Hypocreopsis rhododendri   Hypocreopsis rhododendri

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!

Hymenochaete corrugata

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

Pleurotus ostreatus   Tremella foliacea

A couple of fungi, the Oyster Mushroom (Pleurotus ostreatus) from a fallen Rowan branch, and the Leafy Brain Fungus (Tremella foliacea) on Hazel.



All photos and other content copyright Carl Farmer