Observation 61113: Tricholoma subsejunctum Peck

When: 2010-12-20

Collection location: Mendocino, California, USA [Click for map]

Who: Ryane Snow (snowman)

No specimen available



Proposed Names

42% (4)
Recognized by sight: found in Bishop Pine forest <1 mile inland
62% (3)
Recognized by sight
-7% (3)
Recognized by sight: Brown acute umbo on cap and base of stalk bruising pinkish

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Just want to add
By: Irene Andersson (irenea)
2010-12-23 14:54:05 CST (-0600)

that Peck’s subsejunctum was described from Lewis county, NY – “growing gregariously among mosses and fallen leaves under evergreen and deciduous trees”. I don’t know if his description makes it possible to interprete today – but the type collection is available at The New York Botanical Garden..

European mycologists have made it a synonym to viridilutescens (erroneously, I’m sure), a yellowish green species with black streaks that grows with Picea.

east vs west
By: Noah Siegel (Noah)
2010-12-23 12:10:32 CST (-0600)

European name vs North American name. sejunctum is a oak associate, it might be the same as the eastern NA oak sp. We also have a conifer associate in the east; which is probably what Peck called subsejunctum but he doesn’t mention tree associate in his description.

As far as west coast species… they all need new names. This one is common in the PNW, growing with Abies I believe.

T. davisiae is a eastern species growing with two and three needle pines (and maybe hemlock) It doesn’t get the dark/black virgate fibrils on the cap and is acutely umbonate http://mushroomobserver.org/12912

This is the western “davisiae
http://www.svims.ca/council/illust/Tricholomadavisiae1 AndrewParker.htm

what’s the diff…
By: Debbie Viess (amanitarita)
2010-12-23 11:28:00 CST (-0600)

between sejunctum and subsejunctum?

Created: 2010-12-20 18:13:35 CST (-0600)
Last modified: 2010-12-23 11:25:23 CST (-0600)
Viewed: 131 times, last viewed: 2017-06-08 07:01:18 CDT (-0500)
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