Observation 121995: Boidinia propinqua (H.S. Jacks. & Dearden) Hjortstam & Ryvarden

Corticoids with amyloid spores are a short list, but I’m stumped on this one. It keys to Aleurodiscus amorphus, but that is clearly incorrect as the spores are much too small. Clamps seem to be present, but are rare and difficult to see. No cystidia of any time were observed.

Species Lists


Amyloid spores; The spines are really small and do not show up in this photo
18 X 5 um
no cystidia seen

Proposed Names

-83% (1)
Recognized by sight
Used references: Corticiaceae s.l. Bernicchia and Gorjon
Based on microscopic features: spores 3.9 X 3.1 minutely spiny, strongly amyloid (see photo)
55% (1)
Used references: Karen Nakasone
83% (1)
Eye3 Eyes3
Used references: Mycotaxon 67:123-128 & Canadian Journal of Research, Section C 27: 152 (1949)
Based on microscopic features: spore size and shape, and lack of clamps

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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no clamps
By: Tom Bruns (pogon)
2013-01-03 19:16:31 CST (-0600)

went back and looked at it more closely and could not find a clamp, and the gloeocystidia are there, I guess, but not very obvious. By spore size it keys right to it in the Wu and Buchanan Mycotaxon key, and the line drawings in the Can J. Res C reference fit nicely. Thanks to Karen for the suggestion.

I tried to add the authority to the name but MO didn’t like it for some reason and wouldn’t let me do it. Here is the authority from index fungorum if someone can figure out how to put it in: (H.S. Jacks. & Dearden) Hjortstam & Ryvarden

Here is Karen’s email
By: Tom Bruns (pogon)
2013-01-03 16:51:17 CST (-0600)

“In my keys, I usually come up with Boidinia. Most species in this genus have smallish, amyloid basidiospores. However, gloeocystidia and suburniform basidia are also present. Bodinia propinqua is also known from British Columbia. Check out Can. J. Research, C., 27: 155. 1949 for a description and illustration.” – Karen

Created: 2013-01-02 18:19:59 CST (-0600)
Last modified: 2013-01-03 19:17:42 CST (-0600)
Viewed: 78 times, last viewed: 2017-09-20 10:47:01 CDT (-0500)
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