Underside smooth or wrinkled/roughened <Stereum etc>


 

In essence the underside of a fruitbody in this sub-group is smooth, though there may some wrinkles or occasional warts.

 

Most sightings of such fruitbodies will belong to the genus Stereum.

 

In that genus the effused-reflexed (or sheet+shelf) growth form is common. Such a fruitbody starts its development as a flat, sheet-like growth on a downward facing surface (e.g. the lower side of a leaning trunk or of a fallen branch lying on the ground). After a while the upper edge of this sheet-like growth turns out from the wood to form a horizontal shelf.

 

In some effused-reflexed Stereum species the shelf may curve downwards and, in those species with small fruitbodies, the fruitbody may resemble an upside down cup, its side attached to the wood and you may at first look for them amongst the cup-like fungi. However, all species of Stereum will be put here and there is a warning to that effect in the overview of the cup-like fungi.

 


Underside smooth or wrinkled/roughened <Stereum etc>

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Discussion

Heinol wrote:
13 Jun 2025
As far as I can tell, the underside is smooth - hence my choice of Stereum.

Stereum sp.
Heinol wrote:
28 Feb 2025
Given how thin they are, I'd guess Stereum

Stereum sp.
JTran wrote:
13 Jan 2025
While the upper bracket surface has enough distinctive characteristics to verify here, photos of the underside would be useful in future to make definitive IDs

Xylobolus illudens
Heino1 wrote:
20 Dec 2024
The smooth (rather than pored) underside makes this a species of Stereum - with a nice growth of alga on it.

Stereum sp.
Heino1 wrote:
11 Nov 2024
Possibly an immature Ganoderma

Unverified Underside smooth or wrinkled/roughened <Stereum etc>
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