Armilaria - Central cavity decayer

[janey]

 

Yes... But were these associated with Bleeding canker or the Armilaria ?

 

 

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That's where I was heading with my question

[David Humphries]

Also note the sheet of Mycelium within the crescent shaped crack toward the bottom of the first picture..

 

 

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[Fungus]

See and compare the last four photo's of : http://arbtalk.co.uk/forum/members/fungus-albums-rhizomorphs-armillaria.html

 

And : http://arbtalk.co.uk/forum/ecology/28849-keizers-fungi-q-10.html#post477324

[David Humphries]

David,

See and compare the last four photo's of : http://arbtalk.co.uk/forum/members/fungus-albums-rhizomorphs-armillaria.html

 

Noted

 

 

Gerrit,

is it possible to distinguish a species of Armilaria from it's Rhizomorph

 

eg Colour/Size ?

 

 

 

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[Fungus]

is it possible to distinguish a species of Armilaria from it's Rhizomorph eg Colour/Size ?

 

David,

No, just by certain characteristics of the fruitbodies, such as :

- the either present or missing scales on the cap,

- the olive green or more yellowish colour of the more or less bulbous to not bulbous, but tapered base of the stem, and

- by the colour of the margin of the underside of the well developed annulus to nearly absent ring (Armillaria lutea), with A. mellea having a whitish ring with yellowish marginal zone and A. ostoyae a less developed whitish ring with dark brown to black scales on the lower surface of the ring, as you can see on one of your photo's in your Fungi Directory, I corrected the name of.

Also see pages 166 -167 of my encyclopaedia for a complete macroscopical description of all three species.

[David Humphries]

David,

No, just by certain characteristics of the fruitbodies, such as :

- the either present or missing scales on the cap,

- the olive green or more yellowish colour of the more or less bulbous to not bulbous, but tapered base of the stem, and

- by the colour of the margin of the underside of the well developed annulus to nearly absent ring (Armillaria lutea), with A. mellea having a whitish ring with yellowish marginal zone and A. ostoyae a less developed whitish ring with dark brown to black scales on the lower surface of the ring, as you can see on one of your photo's in your Fungi Directory, I corrected the name of.

Also see pages 166 -167 of my encyclopaedia for a complete macroscopical description of all three species.

 

 

 

Thanks for the info

 

 

 

 

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[Fungus]

And : http://arbtalk.co.uk/forum/ecology/28849-keizers-fungi-q-10.html#post477324

 

And the following photo of the same Quercus robur, which not only lost its bark at be base of the trunk, but also broke at 8 metres hight because of the white rot of Armillaria ostoyae, which first had invaded the cambium with rhizomorphs up to that hight.

By the way, this was the oak on which for the first time ever Oudemansiella mucida also was found.

[Fungus]

And here is an example of both the mycelium of Laetiporus sulphureus (brownrot) and of Armillaria ostoyae (black melanine plaques) decomposing the heartwood of the trunk of a Quercus robur at 6 metres, which only became visible after the tree had been felled because of the rotting pruning wound at this height.

[David Humphries]

By the way, this was the oak on which for the first time ever Oudemansiella mucida also was found.

 

Gerrit,

 

do you refer to the first time for Oude & Oak in Holland ?

 

 

David

[Fungus]

do you refer to the first time for Oude & Oak in Holland ?

 

I meant to say : the first and only time Oudemansiella mucida ever was found fruiting on oak.