Observation 146142: Polyporales sensu lato
When: 2013-09-22
(45.8104° -77.139° 200m)
No herbarium specimen

Notes: Polypore of some kind on a big, old pine log in Zone 04. Pines in the area: red pine (Pinus resinosa), white pine (Pinus strobus). The same big log has fruited a variety of other fungi over the years.

Proposed Names

41% (3)
Used references: Suggested by Daniel Wheeler
28% (1)
Recognized by sight
56% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2013-09-23 08:16:29 BST (+0100)

Postia fragilis is a fairly unremarkable polypore: small, whitish, soft-textured when young, with a matted-tomentose upper surface, and annual fruiting habit. Its most obvious feature, bruising reddish-brown, is mimicked by three other polypores, Parmastomyces transmutans, Amylocystis lapponica and Leptoporus mollis. These species can be separated in the field by their tendency to bruised reddish-brown directly rather than through an intermediate tawny-brown stage. With a microscope Parmastomyces transmutans differs in having dextrinoid spores, Amylocystis lapponica by amyloid cystidia, and Leptoporus mollis by the lack of clamped septate, generative hyphae.

Have you considered
By: Daniel B. Wheeler (Tuberale)
2013-09-22 23:18:16 BST (+0100)

Tyromyces fragilis?

Red-staining, soft, tubes up to 8mm long, no stalk, on rotting conifers.

Created: 2013-09-22 21:26:31 BST (+0100)
Last modified: 2013-09-23 08:44:42 BST (+0100)
Viewed: 34 times, last viewed: 2014-04-05 16:40:34 BST (+0100)
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