Peter Roberts

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  • in reply to: Help needed with fungus on my apple tree please #44098

    Not a healthy-looking tree, I’m afraid. The photos are a bit too distant to see the fungus clearly, but it appears to be a bracket – quite probably Bjerkandera adusta smoky bracket – which is rotting the wood. It usually only rots wood that is already dead, so there may be something else wrong with the tree. Since the fungus is clearly in the trunk as well as in the branches, there is really nothing you can do in terms of cutting away the rotten wood (without felling the tree) and there is no other treatment. If it’s no danger to anyone should it fall, I would leave it and see what happens. There’s a slim chance it might recover.

    in reply to: Possible Tremella or Dacrymyces? #44093

    At a guess this is dried-up Tremella mesenterica which is quite fond of willow. A shower of rain (or a watering can) may make it more obvious, since it readily absorbs water. Dacrymycetous fungi are rarely so ragged and irregular, wet or dry.

    in reply to: Daedaleopsis species? #44083

    Looks fine to me. If you are able to identify it as a Daedaleopsis species, you’re home and dry since Daedaleopsis confragosa is the only known UK species, is very common, and typically grows on willow. Old specimens can turn deep blood red which can be misleading. Some specimens can also have elongated pores – but never as completely gill-like as those of D. tricolor. The latter keeps being reported from the UK, but (as far as I know) is not confirmed as being British.

    in reply to: Arum maculatum: a full set #40915

    Ray Woods and Arthur Chater got me looking at a lot of Ramularia species last year (we seem to have a very pathogen-rich garden – despite my best efforts!) – but, as far as I understand, there is no true Ramularia species that occurs on Arum. Spermosporina aricola is a suggestion for “Ramularia ari” – but I don’t have the literature to hand.

    in reply to: Please help me identify this mushroom #44058

    Beaten me to it. I never was a fast typist…but at least we agree!

    in reply to: Please help me identify this mushroom #44057

    Hi Matt! There are very few toadstools that typically produce fruitbodies in winter, but i think this is one of them: Tubaria furfuracea scurfy twiglet – a bit late in the season, but I noticed one in the garden a couple of days ago. The cap is hygrophanous, soaking up moisture, so changes from reddish brown to pale buff as it dries out. Gliophorus laetus would be way out of its normal season – but is differently coloured and very slimy, hence the name glio-phorus, glue/slime-bearing. It is also only found on old, unimproved, acid grassland such as sheep-grazed moorland.

    in reply to: Exidia sp #44060

    If the fungus is sufficiently distinctive, it should be possible to identify it in the field or from an adequate photo – otherwise it’s just a best guess or a suggestion. In this case, I think you are right first time: Exidia glandulosa (syn. E. truncata) on oak, its usual host.

    in reply to: Unidentified fungi – possibly Peziza #43991

    Sarcosoma globosum is a wonderful suggestion! A very rare fungus of virgin spruce forests unknown in the UK – so not too likely in a Wiltshire pasture. This fungus is, sadly, just the collapsed remains of a puffball that has dried out, been soaked in rain, and probably frosted for good measure till it looks like a scrap of old boot leather. Lycoperdon pratense often persists in this way, but so do several other puffballs and earthballs. Look for it fresh next autumn.

    in reply to: Thoughts on ID’s please #44009

    Your first photo suggests the remains of something fungal. Whatever it was, I think it’s past its best. The fungi in the other two photos are also none too fresh, but are certainly a Stereum species and almost as certainly Stereum hirsutum. Very common on dead broadleaf branches, logs, and stumps with an upper surface that is zoned and hairy/tomentose. Stereum subtomentosum is much less common, rather larger and fan/oyster shaped, with an upper surface that is sub-tomentose/only slightly hairy. Hope that’s some help…

    in reply to: sand dune fungi #43722

    Having looked at a lot of dune fungi over the last few years, I am trying to think what I would think this was if I walked past it – and whether I would stop and take a closer look. Somehow not so easy with a photograph…

    I’ve decided I would think it’s Clitocybe agrestis. Very common on dunes, but under-recorded. More or less white, but variable with age and weather. Thin-fleshed. Not very decurrent lamellae. Almost completely featureless microscopically. Stipe smooth but initially may have some cobwebby mycelium. Best guess. If it’s not that, I ‘ve no idea.

    Tricholoma species (which this is not) can occur in dune slacks with Salix repens creeping willow which, from the point of view of an ectomycorrhizal fungus, is just as good as a tree-sized non-creeping willow.

    I recall seeing the Fomitopsis on sea buckthorn at the pitiful remnant of dune at Minehead – a thin strip squeezed between Butlins and the beach, but still harbouring some marram grass and a few associated fungi.

    Keep searching the dunes! Interesting place for interesting species.

    in reply to: Trechispora cohaerens? #38272

    Good to hear from the Steely Dan man once again, Chris!

    in reply to: Dendrothele acerina? #43966

    Don’t think so. The patches look like they have a distinctly greenish tint, not the chalky white of a Dendrothele species. Also a squash mount of the latter usually consists of compacted fine mineral matter and a few large spores. You generally have to hunt for hyphae and basidia unless you collect material just at the right time after or during rain. I often see these whitish-greyish-greenish patches – but, not ever having looked at lichens, I don’t have a suggestion as to what they might be.

    in reply to: Exidiopsis calcea query #40945

    Thanks, Adam. Not sure I can be very useful, but maybe now and again something will jog a brain cell…

    in reply to: Unknown fungi #43963

    Nice photos. Schizophyllum commune I presume – but a very fancy form of it. Normally a lot less pink and frilly.

    in reply to: Trechispora cohaerens? #38270

    Looks like Brevicellicium olivascens to me. Subglobose spores with slightly flattened side are typical.

Viewing 15 posts - 46 through 60 (of 63 total)