Pholiota possibly adiposa

[RobSutton]

Found this rather fine specimen (largest c.15cm across) growing on Ash at Malham Tarn - I've keyed it out as Pholiota adiposa largely on the viscid cap, adpressed scales and rather large spores 8.5µ (range 7.5-9.7µ) x 5.6µ (range 4.8-6.3µ). Seems to be one of the less common species so a nice find - if I've correctly identified it. Anybody familiar with this one?

[fairplay]

I'm not familiar microscopicaly, but this would be only the second UK record on Ash if confirmed.

Neil.

[flaxton]

I think P aurivella would also fit.
Mal

[RobSutton]

Thanks Neil and Mal - it looks like I've stumbled on a taxonomic muddle - I based my ID on Funga Nordica and have just checked in it to see if I missed P.aurivella only to find that it doesn't have that species but has P.aurivellus as an pseudonym (I'm not sure that's the correct taxonomic term but I'm sure you know what I mean) for both P.cerifera and P.adiposa.

So I then checked the Basidiomycota Checklist and they have P.aurivella but under the descriptions, lists & icons bit state that in Fungi of Switzerland it's called P.cerifera. I have that - so I checked that description and it fits very nicely with my specimen and they separate it from P.adiposa on the basis of the latters smaller spores. So P.aurivella aka P.cerifera (as in FoS) looked good.

Going back to Funga Nordica though they have P.cerifera as a species restricted to Salix and with clavate cheilocystidia which mine doesn't have and P.adiposa as a large spored species which makes that a good fit too apart from they record it as mainly on Beech.

From my limited literature it all seems very confusing - the Basidio Checklist has this as a reference:

Profiles of Fungi - 53 Pholiota aurivella, in Pegler, D.N. & Legon, N.W., The Mycologist 7(3): 105-160 (1993), p. 116

does anyone have a copy they could have a look at for me?

[flaxton]

Agaricus aurivellus Batsch. Elench. Fung. 154, pl.22, fig. 115 (1786): Fr., Syst. Mycol. 1: 242 (1821)
Pholiota cerifera (Karsten) Karsten, Bidr. kanned. Finl. Natur. Folk 32: 297 (1879).
Habitat: on living branches of deciduous trees, especially Fagus and Salix, high above ground level. Distribution: North temperate (Photo: Surrey, Mickleham, Norbury Park, on Fagus trunks. 24 Oct. 1989, Legon).

Pileus 8-12 (-20)cm diam, convex to flattened, bright yellow to golden orange, glutinous when moist, with loose, large flat, glutinous, blackish brown squamules. Lamellae adnate, or with a tooth, 4-8mm broad, at first yellowish buff, at times olivaceous, finally rusty brown, crowded, with numerous lamellulae. Stipe 9-15 x 0.5-2.5cm, usually horizontal to the substratum,
cylindrical, tapering towards the base; tough, surface pale yellowish becoming cinnamon brown below, initially viscid soon dry, squamose below the annulus, squamules recurved when dry.
Context fleshy, pale yellowish. Spore-print rusty brown. Spores 7-9.5 x 5-S/j.m, ellipsoid, brown, thick-walled, smooth, with a small but distinct apical germ-pore. Basidia 25-30 x 6-8/jm, clavate, 4-spored. Lamella-edge sterile, with crowded cheilocystidia. Cheilocystidia 20-40 x 5-10/im, clavate to lageniform, hyaline, thin-walled. Pleurocystidia chrysocystidioid, 30-55 x 5-14/xm, clavato-mucronate, thin-walled, often with orange brown pigments. Pileipellis an epicutis, of gelatinized, repent hyphae, 3-8jxm diam; overlying a hypodermium of thick-walled, brown, encrusted hyphae.
Agaricales - Strophariaceae - Subfam. Pholiotoideae - Pholiota (Fr.) Kummer - Sect.
Adiposae Konr. & Maubl.
Other remarks: Easily recognized but only occasionally found Pholiota limonella (Peck) Sacc. is similar but has smaller spores, 6-9 x 4-5/tm, whilst P. jahnii Tjall. & Bas has spores 5-7 x 3-4yiim: P. squarrosa (Wiegel: Fr.) Kummer lacks a glutinous or viscid surface, and grows caespitosely at the base of deciduous trees.
English name: Golden Pholiota.

[Chris Yeates]

Originally Posted by RobSutton

. . . . it doesn't have that species but has P.aurivellus as an pseudonym (I'm not sure that's the correct taxonomic term but I'm sure you know what I mean)

synonym is the term what you are struggling for Rob . . . . it only uses its pseudonym - Zoe Tempest - when it is writing for Mills and Boon

cheers

Chris

(boy am I being helpful today )

[RobSutton]

Thanks Mal - it fits nicely my specimen. Getting access to the range of literature you seem to need is difficult so many thanks for that.

Originally Posted by Chris Yeates

synonym is the term what you are struggling for Rob . . . . it only uses its pseudonym - Zoe Tempest - when it is writing for Mills and Boon

cheers

Chris

(boy am I being helpful today )

Chris - I'm not familiar with Mills and Boon are they the authors of that seminal work on Phallus impudicus?

[hamadryad]

another of my fave fung, have we all decided on P. aurivella/

on another aspect of this fungi, actualy rare in my experience (none recorded) on salix, i know it predominantly on beech, but also birch, and london plane.

I think with many fungi we should, rather than look to species restrictions, look at the wood types for example ring porus, diffuse porus etc. if there is one thing ive learnt over the years is NEVER be suprised by the uncoventional mr Fung as a friend once put it!

monkey d got hericium erinaceus on Oak this year too, was a beauty too.

What a year this has been for fungi.

[fairplay]

Hama's quote:
"I think with many fungi we should, rather than look to species restrictions, look at the wood types for example ring porus, diffuse porus etc. if there is one thing ive learnt over the years is NEVER be suprised by the uncoventional mr Fung as a friend once put it!"

Basically, I think you are trying to say we should look at the wood the fungus is growing upon (or consuming), we do Hama, we do.

Neil.

[hamadryad]

no, you missed my point, rather than expressing suprise at finding a particular fungi on a particular species, im suggesting it may be looked at more in keeping if we looked to the individuals wood structure, diffuse or ring porus for example.

I was NOT stating the obvious!