Rigidoporus

[Fungus]

if you are refering to it being a first for R. ulmarius specifically on Horse Chestnut, or specifically on Horse Chestnut at height ?

 

David,

Both, as it was not yet documented from Aesculus and not documented from cavities at height on any tree species, because it is known to be a root (plate) and buttresses rotter of Ulmus (and sometimes of Quercus, Platanus, Populus and Corylus).

[David Humphries]

David,

Both, as it was not yet documented from Aesculus and not documented from cavities at height on any tree species, because it is known to be a root (plate) and buttresses rotter of Ulmus (and sometimes of Quercus, Platanus, Populus and Corylus).

 

 

Gerrit the Uk has a lot of R.ulmarius on Horse Chestnut, possibly it's most common host since we lost a huge proportion of our Elms.

 

The height thing I'm not so sure about, but I have seen it on Beech up on the trunk at maybe 5ft.

 

 

.

[Fungus]

the Uk has a lot of R.ulmarius on Horse Chestnut, possibly it's most common host since we lost a huge proportion of our Elms. The height thing I'm not so sure about, but I have seen it on Beech up on the trunk at maybe 5ft.

 

David,

Although the photo documentation looks quite convincing , did you, apart from the colour differences of the flesh and tubes, as Janey cited, ever check the microscopical features of R. ulmarius against those of P. fraxinea ?

[David Humphries]

David,

Although the photo documentation looks quite convincing , did you, apart from the colour differences of the flesh and tubes, as Janey cited, ever check the microscopical features of R. ulmarius against those of P. fraxinea ?

 

 

No, I did not.

 

May appear naive, but for me flesh, tubes & host is enough of a difference to tell the two apart.

 

 

 

.

[Fungus]

... for me flesh, tubes & host is enough of a difference to tell the two apart.

 

In The Netherlands (and according to R & G, elswhere in Europe), the host would be the problem, because R. ulmarius is not (yet) documented from Aesculus, and P. fraxinea is, apart from Fraxinus, not only known from Aesculus and Ulmus, but also from Castanea, Celtis, Eucalyptus, Fagus, Gymnocladus, Juglans, Olea, Malus, Platanus, Populus, Prunus, Robinia, Quercus and Salix.

So it is not that I don't believe you, but "for science sake" it's necessary to at least once microscopically check and document it and store material in an official herbarium in order to prevent a future debate on the validity of the combination of fungus and host.

[sean]

In The Netherlands (and according to R & G, elswhere in Europe), the host would be the problem, because R. ulmarius is not (yet) documented from Aesculus, and P. fraxinea is, apart from Fraxinus, not only known from Aesculus and Ulmus, but also from Castanea, Celtis, Eucalyptus, Fagus, Gymnocladus, Juglans, Olea, Malus, Platanus, Populus, Prunus, Robinia, Quercus and Salix.

So it is not that I don't believe you, but "for science sake" it's necessary to at least once microscopically check and document it and store material in an official herbarium in order to prevent a future debate on the validity of the combination of fungus and host.

 

So get a specimen and send it where??? Kew gardens perhaps.?

[David Humphries]

In The Netherlands (and according to R & G, elswhere in Europe), the host would be the problem, because R. ulmarius is not (yet) documented from Aesculus, and P. fraxinea is, apart from Fraxinus, not only known from Aesculus and Ulmus, but also from Castanea, Celtis, Eucalyptus, Fagus, Gymnocladus, Juglans, Olea, Malus, Platanus, Populus, Prunus, Robinia, Quercus and Salix.

So it is not that I don't believe you, but "for science sake" it's necessary to at least once microscopically check and document it and store material in an official herbarium in order to prevent a future debate on the validity of the combination of fungus and host.

 

Gerrit a vast majority of the recent records for R. ulmarius here in the British Isles are on Aesculus hippocastanum.

 

Here is a sample reference, and also a link to the data set......

 

"Rigidoporus ulmarius, on/with Aesculus hippocastanum, wood, parkland & scattered trees, 11/08/2007, England, Middlesex (VC: 21), Hampstead Heath, TQ265865, coll.: A.S. Overall, id: A.S. Overall, FRDBI Record No.: 1282648, Origin of Record: London Recording Group (Andy Overall ) (full record data)."

 

British Fungi - record details

 

 

 

 

.

[Fungus]

a vast majority of the recent records for R. ulmarius here in the British Isles are on Aesculus hippocastanum.

"Rigidoporus ulmarius, on/with Aesculus hippocastanum, wood, parkland & scattered trees, 11/08/2007, England, Middlesex (VC: 21), Hampstead Heath, TQ265865, coll.: A.S. Overall, id: A.S. Overall, FRDBI Record No.: 1282648, Origin of Record: London Recording Group (Andy Overall ) (full record data)."

British Fungi - record details

 

.

[David Humphries]

So get a specimen and send it where??? Kew gardens perhaps.?

 

Sean, I send my samples down to Doctor Martin Ainsworth down at the Jodrell Laboratory at Kew.

 

I'll get you the full address if you need it.

 

 

 

.

[sean]

Sean, I send my samples down to Doctor Martin Ainsworth down at the Jodrell Laboratory at Kew.

 

I'll get you the full address if you need it.

 

 

 

.

 

 

Cheers David.....will be good to get some clarification.....even if its just to show that gerritt bloke that he knows nothing about fungi.