Observation 27966: Bolbitius callisteus (Peck) Watling

When: 2009-09-19

Collection location: Mingo Wildlife Refuge, near Puxico, Missouri, USA [Click for map]

Who: MOFunGuy (jrapp)

No specimen available

Found on a rotting log in a mixed-wood bottom land. Certainly looks like a Hygrocybe but it’s growing on a log. Most H. are not generally found on rotting wood, though if the wood is well-rotted, then it’s perhaps pretty close to growing on soil anyway?

This individual was quite small – overall about the height of a penny. It has a yellow stem with white base. If I’d found it on the ground, the most usual suspect around here is H. cuspidata or persistens which range from yellow-orange to red capped. H. miniata is said to be found on wood, but is not supposed to be viscid, like this one is.

Any suggestions as to species ID?

[sorry, don’t have spores or saved sample]


[admin – Sat Aug 14 02:02:56 +0000 2010]: Changed location name from ‘Mingo Wildlife Refuge, near Puxico (Southeast) Missouri, USA’ to ‘Mingo Wildlife Refuge, near Puxico, Missouri, USA

Species Lists



Proposed Names

-14% (3)
Recognized by sight
Used references
30% (2)
Recognized by sight: Shape of cap, cap striations, and small size remind me of B. vitellinus; except for habitat and color.
Used references: Arora mentions B. callisteus as a possibly orange capped species within his comments upon the wood inhabiting B. aleuriatus.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: MOFunGuy (jrapp)
2009-11-11 12:48:44 PST (-0800)

Thanks for the response all. I wasn’t looking at Bolbitius to begin, so this got me moving in that direction. Dave – the Flickr image (from France?) certainly does look what this fella could be at complete maturity. Also, Arora’s write up in the B. aleuriatus section suggests B. callisteus as a real possibility. Gerhard – the B. psittacinus write up in Czech Mycology June 2007 certainly has a detailed description which well could match:


It’s possible they are both aiming at the same thing.

I realize the limitation of working with just an image of this one example without more data and a range of specimen. But this fella belongs somewhere, no? I’m hoping that these images strike a note with other observers who may have seen something like this.

It’s also interesting that most every other similar observation begins with Hygrocybe, then ends with Bolbitius. Obviously there are enough similar characteristics to suggest a look alike, except that it’s growing on wood. Then again there are observations of what folks have thought are Hygrocybe also growing on wood…

I will certainly be on the lookout (next year) for more of these creatures when I can gather more data. Meanwhile if something that looks like this fits within either Hygrocybe or Bolbitius observations, I’d love to know.

Either way, you can’t say this fella don’t have looks, eh?

Did a little searching
By: Dave W (Dave W)
2009-11-11 04:47:08 PST (-0800)

yesterday, and it appears that B. callisteus and B. callistus are two different species. A couple of online sources show an orangish B. callisteus that looks like it could be a more mature version of the one seen in this observation. On the other hand, B. callistus appears to be a bluish mushroom. So, I’m supposing that callisteus and callistus are not synonyms; and wondering if these similar names may cause some confusion.


Could be the newly described Bolbitius psittacinus
By: Gerhard Koller (Gerhard)
2009-11-10 16:33:03 PST (-0800)

which I know from Czech Republic only where it is invasive obviously. The origin of it is not known yet. I think there are no finds besides the typus yet. Would be interesting to save and send to the authors of this taxon.

Not B. callisteus
By: walt sturgeon (Mycowalt)
2009-11-10 14:44:45 PST (-0800)

Or not as I interpret this species. Don’t know what it is though….

By: Johannes Harnisch (Johann Harnisch)
2009-11-09 18:18:08 PST (-0800)

i don’t think it is Hygrocybe the cap has striations and it is growing on wood,

Beautiful mushroom!
By: Dan Molter (shroomydan)
2009-11-09 15:07:42 PST (-0800)

Beautiful mushroom! and excellent photos!

Humidicutis marginata maybe?

Created: 2009-11-09 13:01:22 PST (-0800)
Last modified: 2018-11-02 18:17:59 PDT (-0700)
Viewed: 387 times, last viewed: 2019-01-09 18:00:18 PST (-0800)
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