Observation 265621: Polyporales sensu lato

When: 2016-12-28

Collection location: Cumberland Co., Maine, USA [Click for map]

Who: Ian

No specimen available

This was found growing on the dirt walls of a makeshift root cellar. The dirt contains some pine needles and other organic debris, and there may have been some buried wood nearby. There were three patches, each 2-6 inches wide, growing within two feet of each other. The outsides look like mycelium, but the centers of the patches look like hymenium – in some places it resembles pores, in others teeth.

Update: Agar culture of this has pores, 2-4 per mm. When turned upside down, it drops spores. Spore print white. Spores ellipsoid to subglobose, ganodermoid.

Species Lists


The light is provided by a flashlight. Normally this location is very dark.

Proposed Names

43% (2)
Recognized by sight
27% (1)
Used references
Based on microscopic features: Clamp connections present, spores ellipsoid to subglobose

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= Observer’s choice
= Current consensus


Add Comment
I made an agar culture of this…
By: Ian
2017-01-23 16:15:27 EST (-0500)


I can’t tell if it is forming pores or just a reticulate form of mycelium. Clamp connections present.

The outside does look like mycelium.
By: Django Grootmyers (Heelsplitter)
2016-12-28 22:33:56 EST (-0500)

IIRC, this sort of margin is called “fimbriate”. If you want to key this out you can check out Gilbertson & Ryvarden’s “North American Polypores” here although this may require microscopy.