Observation 31654: Byssocorticium californicum Jülich

When: 2010-01-08

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

Who: Tom Bruns (pogon)

Specimen available

I picked this up because of the distinctive color, thinking it was Amaurodon, which was collected previously on one of the Pt Reyes Mycoblitz forays, but this specimen lacked the colorful ornamented spores and clamps that characterize Amaurodon. After looking in Fungi of Switzerland it seemed to be close to Byssocorticium pulcharum, but the spores were too small, and B atrovirens has clamps, which this specimen does not. A web searched turned up the name B. californicum, and the microscopic description of it fits well. Macroscopically the color is a bit off. Julich calls it gray-green, while this is definitely more blue-green. The difference could be age of the specimen he examined. Interestingly the holotype comes from Mt. Vision and was found on rotted Pinus muricatus wood. The pictured specimen is fruiting on a large rust gall. The species was very common on the underside of dead wood all over the top of Mt. Vision in the older forest.

[admin – Sat Aug 14 02:03:19 +0000 2010]: Changed location name from ‘Mt. Vision, Pt. Reyes National Seashore’ to ‘Mount Vision, Point Reyes National Seashore, Marin Co., California, USA

Species Lists


fruiting on underside of rotting rust gall
closeup of same fruitbody
elongate clampless basidium
Thickwalled small subglobose spores (yes I know this image is crumby)

Proposed Names

90% (2)
Eye3 Eyes3
Used references: Julich’s Monographie der Athelieae (Willdenowia. Beiheft.7 1971) , Fungi of Switzerland Vol 2, and Erickson & Ryvardin Cortiaceae of Northern Europe
Based on microscopic features: clampless hyphae, no cysidia, thickwalled small (2.5-3.5 um) more or less globose spores

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Darvin DeShazer (darv)
2010-01-09 03:15:17 CET (+0100)

WOW – a nice strange fungus with beautiful colors. This is a another new one to look for and it should be easy to ID.
Thanks Tom!

Created: 2010-01-09 01:33:35 CET (+0100)
Last modified: 2010-08-14 23:23:20 CEST (+0200)
Viewed: 222 times, last viewed: 2017-08-04 00:53:35 CEST (+0200)
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