Observation 95311: Inocybe praecox Kropp, Matheny & Nanagyulyan

When: 2012-05-22

Collection location: Tumwater, Washington, USA [Click for map]

Who: Image Sharer (image sharer)

No specimen available

Growing solitary on a woodchip trail

Species Lists


z Basidia 600x in congo red and koh.jpg
z Cheilocystidia 150x in congo red and koh.jpg
z Cheilocystidia 600x in congo red and koh.jpg
z Cheilocystidia 600x2 in congo red and koh.jpg
z Cheilocystidia 600x3 in congo red and koh.jpg
z Pleurocystidium 600x in congo red and koh.jpg
z Pleurocystidium 600x2 in congo red and koh.jpg
z Pleurocystidium 600x3 in congo red and koh.jpg
z Spores 600x in congo red and koh.jpg

Proposed Names

48% (2)
Recognized by sight
Based on microscopic features
17% (2)
Used references: Kropp et al. Phylogenetic taxonomy of the Inocybe splendens group
and evolution of supersection ‘‘Marginatae’’. Mycologia, 102(3), 2010, pp. 560–573.
Based on microscopic features
54% (1)
Recognized by sight: If the spores are 7.5–10 × 4.5–5.5 μm. The cystidia are a match, also the rest of the description.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Reading an Inocybe key
By: Irene Andersson (irenea)
2012-05-23 13:28:56 PDT (-0700)

from the start would tell you that the caulocystidia are important characters.
And not only that, it also makes you realize that a single specimen isn’t always enough för a proper ID. Some characters are sometimes only seen on very young ones, like a cortina or a thin veil on the cap. Some other characters are only seen on older specimen, like when a fibrillose cap surface breaks up in scales, or colour changes on the stem.

Good info
By: Image Sharer (image sharer)
2012-05-23 13:28:27 PDT (-0700)

Everyone’s comments here were helpful indeed.

yell away Else
By: Britney Ramsey (Riverdweller)
2012-05-23 12:16:51 PDT (-0700)

All very great info, I had no idea. I mishandle Inocybe all the time then…lol

Seriously, great info, thank you.

characters on the stipe of Inocybe species – DO NOT TOUCH THE STIPE!
By: else
2012-05-23 10:59:30 PDT (-0700)

One of the main characters for identifying Inocybe species is about the stipe, about the presence or absence of cystidia on the stipe (you can see them in the second picture as a pruinosity on the stipe; in the picture with the ruler this is absent, as they are now on your fingers!). Not only of importance is the presence or absence, but also how far down they go on the stipe, are they only on the top, or do they go down all the way towards the bulb, or any place in between.
For that reason it is very important to be very very very gentle with the stipe, and to keep your fingers far away from it. the mushroom can be handled by a finger on the cap and one on the base.

Inocybe is not the only genus with important characters on the stipe, Conocybe is another example, Lepiota species have verlar remnants there (or not) and so on.

Handling your mushrooms at the stipe does not make them look better anyway. Fingerprints on pristine Russula stipes don’t make for nice photographs.

I am infamous for yelling at people about this, i’m afraid.

Inocybe requires more of us hunters documenting them
By: Image Sharer (image sharer)
2012-05-23 09:35:55 PDT (-0700)

There’s still a lot of confusion and lack of photographs sorrounding Inocybe. Rarely does anyone label them to species it seems. If there’s one genus besides Psilocybe that needs documenting (and is visually interesting enough) I’d say Inocybe is worth our consideration.

All of the keys I’ve seen so far lack large, quality images that actually prove useful for identification – which is the entire purpose of the keys. I say we photograph them like there’s no stopping us.

I think we have the same one.
By: NeoSporen
2012-05-23 00:34:22 PDT (-0700)

I posted an Inocybe sp. just a while ago, ans believe it’s close to the same species.

There’s a key
By: Irene Andersson (irenea)
2012-05-22 23:34:19 PDT (-0700)

to North American species in the splendens group in this paper:


I suspect that this one belongs there.
Reading keys is an excellent way to learn the important characters on mushrooms of different genera.

Created: 2012-05-22 15:28:05 PDT (-0700)
Last modified: 2012-05-23 11:29:23 PDT (-0700)
Viewed: 180 times, last viewed: 2017-06-12 22:44:55 PDT (-0700)
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