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Rigidoporus ulmarius


David Humphries
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Rigidoporus ulmarius;

common bracket found on Willow, Elm and Horse Chestnut.

Sometimes mistaken for 'Perenniporia fraxinea' which favours Poplar, Elm and Ash.

Both have perenial brackets.

 

Although niether are on the Red data list of threatened brittish fungi,

P. fraxinea is thought to be somewhat rare.

 

The easy way to distinguish the difference, is when you cut a slice out.

P. fraxinea has flesh and tube layers of the same colour. Whereas Rigi has orange fading tubes which contrast sharply against the spongy white flesh.

 

Green algal and/or moss growth on the top surface is pretty typical.

 

Decay type is Brown cubicle rot.

 

 

Here are three Rigidoporus brackets hosted on Horse Chestnut.

 

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P3020021.jpg.fbeef8f93601654ebc94e97f7d69cb5a.jpg

P3020020.jpg.96bced22d2c17115babfe73141a6d107.jpg

P3020024.jpg.ebb68e93f29d16cdccd143905a511aa4.jpg

P3020001.jpg.183b0c385854fcbb2f224ea68b1b9373.jpg

Edited by Monkey-D
Decay Type added
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  • 3 weeks later...
  • 3 months later...

Hi,

 

Good thread as have been struggling between the two. Ok so I think I know of a good size R.ulmarius bracket under a large limb on a chestnut in a local park (Will take pictures Monday). The limb is over a busy path in the park. As it’s a brown rot I would say it would be good to reduce/remove the limb pretty soon?

 

Cheers Steve

 

ps heres some pics I took a while back of i think R.ulmarius on a chestnut stump?

008-Optimized.jpg.556a0cf94560baded1d726ebff77c849.jpg

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003-Optimized.jpg.fc52a8891e9ece6beba2afc0844ceb79.jpg

001-Optimized.jpg.59fe2c3e687c7717db9139541f3b2c65.jpg

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