When: 2010-01-10

Collection location: Point Reyes National Seashore, Marin Co., California, USA [Click for map]

Who: Tom Bruns (pogon)

Specimen available

The spiny spores, ampullate septa and general resupinate habit are typical for the genus. The size of the spores 3.2 X 2.5 is right for the species complex. I sent images and measurements to Karl-Henrik Larrson, who works on this group and here is what he said:

“Seeing your photos with the rather crowded hymenophore spines, reminds me mostly about a version of Trechispora farinacea that grows on hardwood in wet places and that I think is a species separate from T. farinacea s.s.”

This collection was on oak (I think) and came from the first bridge on the horse trail during very wet weather, so the habitat that Larrson mentions is almost perfect. The size of the basidia 22 X 3.8 seems unusually long.

Species Lists


this is the whole collection
Here is a closeup of the spines
These are the spiny spores and a basidium with really long sterigmata – the length of the basida (22) is atypical for the genus as far as I can tell
a swollen “ampullate” septum, with a clamp visible below, and crystal visible to the left. I had to look a hard to convince myself that ampullate septa occurred and I still have some doubts
??? seems like chlamydospores, but maybe immature basidia

Proposed Names

55% (1)
Used references: Corticieaceae of Northern Europe and K-H Larsson’s paper in Symb. Bot. Ups.
Based on microscopic features: spiny spores of the right size, ampullate septa (sort of -see comments on images)

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
By: Darvin DeShazer (darv)
2010-02-24 08:38:46 IST (+0530)

This is an excellent post. Complete with doubt (which is nice to see), microphotographs, collaborative contact and references. However, I still think you might be making these strange names up. There is still so much to learn!

Created: 2010-02-24 06:53:34 IST (+0530)
Last modified: 2010-02-24 06:53:34 IST (+0530)
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