When: 2008-11-28

Collection location: Grizzly Peak Blvd., Berkeley, Alameda Co., California, USA [Click for map]

Who: Richard Sullivan (enchplant)

No specimen available

Growing plentifully on older wood chips, individuals or small clusters.

Species Lists


Proposed Names

4% (3)
Recognized by sight: Cinnamon spore print, viscid cap, no veil.
62% (2)
Recognized by sight
63% (3)
Used references: Index Fungorum lists this one as the prefered name.

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= Observer’s choice
= Current consensus


Add Comment
By: Johannes Harnisch (Johann Harnisch)
2010-04-19 17:18:35 CDT (-0500)

Fungorum lists Bolbitius titubans var. olivaceus (Gillet) Arnolds 2003 as the preferred name for Bolbitius variicolor .

but what are Homotypic Synonyms??

BTW, lovely capture of this fungus, Richard…
By: Debbie Viess (amanitarita)
2010-04-19 09:24:02 CDT (-0500)

regardless of what name we eventually put on it!

Yes, but others add to this…
By: Douglas Smith (douglas)
2010-04-19 08:14:07 CDT (-0500)

There is also Arnolds that states B. titubans var. olivacea is a synonym of B. variicolor, and should be the preferred name. He mentions that there isn’t any microscopic difference between the variations of B. titubans, only this rugulose center of the cap.

What does Index Fungorum say about this at this time?

Rugose cap & color of stem
By: Darvin DeShazer (darv)
2010-04-18 22:52:25 CDT (-0500)

Atkinson, G. F. 1903. Mushrooms: Edible, Poisonous, Etc. Henry Holt & Co., New York, NY. 322p
Watling, R. 1982. British Fungus Flora: Agarics and Boleti Vol.3. Bolbitiaceae: Agrocybe, Bolbitius and Conocybe. Royal Botanic Garden, Her Majesty’s Stationary Office, Edinburgh, England. 139p.

Atkinson has a photo and a good description.
Watling Keys B. variicolor with a bright yellow stem and B. titubans & B. vitellinus with whitish stems and lacking the raised rugulose or reticulate in the center of the cap.

Darv, The B. variicolor & B. titubans complex.
By: walt sturgeon (Mycowalt)
2010-04-18 10:13:55 CDT (-0500)

How do you distinguish them? http://www.eiu.edu/...