Observation 30969: Cortinarius fulmineus sensu Moser

When: 2009-12-26

Collection location: Rockville Hills Regional Park, Solano Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

This specimen was collected by Darvin DeShazer and the first two in-situ photos are his.
We thought that it looked very similar to MO# 28207. http://mushroomobserver.org/28207?search_seq=1140586

In fact, the spores were very similar in shape and size, measuring approx. 8.6-9.9 X 5.3-6.2 microns. However, the KOH reactions were not identical. Instead of all the parts turning bright red, the cap and stipe turned a reddish brown and the flesh areas only stained perhaps a pinkish buff.(see 3rd photo) I wonder if the KOH staining reaction is somewhat age/maturity dependent? The odor was not strong and the taste was mild.

[admin – Sat Aug 14 02:05:18 +0000 2010]: Changed location name from ‘Rockville Hills Regional Park, Solano County, California’ to ‘Rockville Hills Regional Park, Solano Co., California, USA’


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This is the most common species in Section Fulvi under Live Oak.
By: Dimitar Bojantchev (dimitar)
2009-12-28 06:38:58 PST (-0800)

This observation matches in every way numerous collections of the same species that I have. No, the KOH does not vary that much with age, and particularly not in this case — the KOH reaction you describe is exactly the same as my findings. This is the most common of the Fulvi under Live Oak in No. California.


Created: 2009-12-27 16:12:56 PST (-0800)
Last modified: 2019-03-03 21:50:31 PST (-0800)
Viewed: 113 times, last viewed: 2019-03-11 14:31:26 PDT (-0700)
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