Observation 32905: Melanoleuca Pat.

When: 2010-01-26

Collection location: San Rafael, Marin Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

These were growing in a urban park under a planted tree(Live oak i believe) with wood chips also present.
The spores were white, amyloid and warted. They were approx. 6.4-8.1 X 5.0-5.4 microns.
The gills were whitish, notched, close to crowed and rather rough edged.
The caps were fairly rough and wrinkled and reminded me of Boletus zelleri in appearance and texture.
As can be seen by the photos, cap, stipe and gills seemed to attract a lot of dirt particles but they were not obviously viscid.
I wanted to at least put a genus name on them but nothing seemed to quite fit???
Forgot to note odor or taste but I don’t believe they had a strong odor.

[admin – Sat Aug 14 02:05:35 +0000 2010]: Changed location name from ‘San Rafael, Marin County, California’ to ‘San Rafael, California, USA’


Proposed Names

29% (1)
Recognized by sight
90% (2)
Recognized by sight: The strong contrast between the cap and gills is the first clue, the habitat in woodchips is the second…
Based on microscopic features: … and the amyloid-warted spores are the third.

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

= Observer’s choice
= Current consensus


Add Comment
By: Dimitar Bojantchev (dimitar)
2010-01-28 22:49:13 EST (-0500)

but don’t ask about species name..

Thanks Christian
By: Ron Pastorino (Ronpast)
2010-01-28 22:17:05 EST (-0500)
I was tempted to put Melanoleuca down as genus but I was under the impression the caps were normally smooth and less firm. But everything else does fit into the genus nicely.

Created: 2010-01-28 21:57:04 EST (-0500)
Last modified: 2010-11-01 23:18:18 EDT (-0400)
Viewed: 62 times, last viewed: 2019-03-17 00:57:05 EDT (-0400)
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