Unidentified fungus on branches attached

[Nettle Runner]

2/3 May 2010
I noticed an unusual growth pattern on several trees whilst foraying with FungiJohn on the 2nd.



Return to site next day, with Pauline (PMG) and Ian and re-examined the branches. Pauline suggested it was a fungus. It did not seem to be specific to any one tree type, occuring on Ash, Elder and Hazel. However, all the infected trees where either dead or dying. Healthy trees were free of the infection.



Your comments or suggestions welcomed.
Les

[The Woodman]

Its a phenomenon called "winged cork" and often can be found on the smaller branches of Field maple, elms and Spindle. I think I've seen it Hornbeam as well. It occurs on vigorous shoots and doesn't have any pathological significance as far as I know but it's interesting you say the trees with it were either dead or dying.

I don't know what causes it but hopefully someone will tell you.

[Chris Yeates]

Originally Posted by The Woodman

Its a phenomenon called "winged cork" and often can be found on the smaller branches of Field maple, elms and Spindle. I think I've seen it Hornbeam as well. It occurs on vigorous shoots and doesn't have any pathological significance as far as I know but it's interesting you say the trees with it were either dead or dying.

I don't know what causes it but hopefully someone will tell you.

I agree with The Woodman; in this part of Yorkshire it tends to be chiefly on field maple

I can remember years ago when the plant gall people were spending (wasting imo) lots of time discussing whether this was a gall or not - clearly not . . .

Chris

[Nettle Runner]

Many thanks Woodman and Chris for an ID. I will certainly keep an eye open for this in the future, especially around field Maple.
Les

[FungiJohn]

So, not fungal then Les

John