Bjerkandera adusta

 

The Smoky Bracket, Bjerkandera adusta, is a very common fungus, which can be found in a fully prostrate form (effused), as well as as, perhaps much more commonly, caps (reflexed).

It should always be pressed on the pore surface to see if it darkens upon pressure. Also cross-sectioning the tissue should reveal the grey pore layer contrasting well with the white flesh. Bjerkandera fumosa has lighter coloured pores, separated from the white flesh by a dark line.

Today, there were a number of individual fruiting bodies, mostly resupinate, on fallen branches of Oak in the first Oak compartment to the north of the car park at Dene Park. 

There was evidence I think of the very yellowed flesh of previous fruiting bodies below and behind the current ones, and some slightly yellowed flesh of the current brackets visible in the gaps of the larger fruiting bodies seen here. Some clear and some cloudy liquid droplets on this lower surfaces. In some places the flesh is reflexed to start cap formation, although why is less clear.

This other large resupinate fruiting body appears to show more small developing caps, and also maybe  a couple of patches of the pore surface darkened by pressure.

 

Here the fungus has used a leaf as support to produce a thin resupinate structure quickly and easily.

Here is an old cap, decaying, brown and fibrous.

And here is a Springtail, possibly Tomocerus vulgaris!

Biscogniauxia nummularia - Beech Tar Crust or Charcoal Canker

 

I think this is most likely to be Biscogniauxia. Stated to be a significant parasite of Fagus sylvatica if the environmental conditions stress the tree in various ways - increasing risk drought is perceived as a bit of a worry for European Beech in Southeast England.

This is a section of dead hardwood in the trunk of one of these trees to the east of the main track from the car park at Dene Park. The fruiting body "erupts" through the bark nicely.

Are there any clues to why this bark appears dead in this image here? There is good evidence that these species occur in healthy living trees as endophytes and then become invasive under water stress conditions. Could the initial carving have possibly caused this overall wound that allowed a strip canker to get to work, and we are now seeing the results as the fruiting bodies appearing, perhaps later through the letters themselves?

Here, these fruiting bodies are just appearing recently on the heartwood of this large branch on the ground that tore away from the trunk maybe a couple of years ago. 

The species used to be known as Hypoxylon nummularium: this should now always be known as Biscogniauxia nummularia (Bull.) Kuntze. This genus is distinguished from Hypoxylon principally in lacking coloured stromatal pigments and in having an initial covering layer, lost at maturity, which bears conidia. Many species have effused and flattened rather than pulvinate stromata.

Biscogniauxia atropunctata is a saprophyte and parasite affecting oaks east of the rocky mountains, It starts as a blue-white fruiting crust with tiny black pimples, eventually darkening to black patches on dead and dying wood.

Biscogniauxia mediterranea is well known as the causative agent of charcoal canker in cork oak and is a serious problem in Portugal.

Biscogniauxia rosacearum may possibly be one of the main fungi that feed on grape vines and almonds.

Biscogniauxia species that produce interesting secondary metabolites can also be found in deep sea sub-floor sediments!

Arcycria denudata possibly

Picking up a fallen branch from the leaf litter, I eventually spotted a few brick-red slime mould fruiting bodies, which might be the relatively common Arcyria denudata, purely on the basis of colour and probability. Microscopy would be needed for a reliable identification. I might be able to find the branch again, to see if the condition of the fruiting bodies has improved at all following the freezing conditions over the past week.

Skeletocutis nivea sl perhaps

 

This seems a likely candidate because: 

The pores are tiny and very close together, about 7 - 10 per mm. only just visible in the image

the crust is relatively thin, with pores probably less than 2 mm deep

The pores can be found very close to the edge of the hymenium

A very pale colour, only just lightly browning with age

The margins are turning up - just - in this case

So if you didn't look closely, this specimen could perhaps be confused on first view with either Byssomerulius corium or even Stereum rameale?

The correct name could perhaps be Skeletocutis semipileata or nemoralis, depending on which author you follow!

Sweet Chestnut

While looking at the Oriental Chestnut Leaf Galls, I came across upper side mines of Tischeria ekebadella, milky white, with frass ejected so not building up in the mine. 

Calocera and Phlebia

 

Calocera cornea and possibly Calocera viscosa as well

This was growing on one of the logs placed as car park dividers, which I had thought to be Pine rather than a broadleaved such as Beech. Tentatively ID'd as Calocera cornea.

This was growing on a possibly very well decayed Yew log just along the path on the right from the car park to the SE corner of the wood. Tentatively Calocera viscosa.

This is what the "C. viscosa" looked like last year, somewhat more convincing but not much bigger!

Crusts and Jellies by the Parish Boundary

 

Could this just possibly be Scytinostroma?? The general appearance, waxiness, thickness and combination of colours are good I think. Must go back to sniff it!

An older fruiting body I believe.

Hymenochaete rubiginosa almost certainly, although the hymenial surface is a bit lighter than I think it should be..

Exidia truncata, Witches' Butter, said to be found on attached or recently (really??) fallen branches of Oak and sometimes others such as Hazel.