black fungus on Poplar

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corzon
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black fungus on Poplar

Post by corzon » Sat Feb 04, 2017 8:41 am

I found this black fungus on Polar tree trunks, lying besides the road. Can it be identified? And is there any relation between the reddish coloured wood and the fruiting body of the fungus?

Thanks for your input!

Regards
Cor
Attachments
5844 med.jpg
5846 med.jpg
5848 UKF.jpg
5850 med.jpg

mollisia
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Re: black fungus on Poplar

Post by mollisia » Sat Feb 04, 2017 10:30 am

Hello,

this is a Hypoxylon from the rubiginosum group, possibly H. macrocarpum. You can try to cut a thin layer of the wine-red surface away with a knife, so that the underlying wood is visible - the freshly cutten wood often smells faintly but distinct like cacao powder or a bit vanilla with it ....
The black crust is the fruitbody from last year, whereas the wine-red layer is the beginning new one (immature yet).

Like in Nemania (which was formerly placed within Hypoxylon) you need microscope and KOH for determination.

best regards,
Andreas

corzon
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Joined: Sat Jan 28, 2017 7:50 pm

Re: black fungus on Poplar

Post by corzon » Sat Feb 04, 2017 12:26 pm

Thanks Andreas, for the genus name and additional remarks. I made the picture last year but the trunk is still there, I'll look for more red coloration!

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