Observation 196795: Inocybe
When: 2015-01-19
No herbarium specimen

I collected more of these on January 30. Out of 10 mature caps, 2 gave me just enough print to determine color.


Growing along stream cut of small stream. In industrial area, very polluted. Mushrooms smelled like the stream. I did not taste. Mushrooms were saturated with water and had been recently washed over by water. Wet but not slimey. Growing in the mud. Nearby many pines, small brushy elm and small hardwood brush.

Cap: mature cap, max, 1 inch across. Flesh, dull light brown, dense, 1/2 cm at center. See profile photo. Cortina can be observed in buttons and immature specimen.

Stem: 1 cm across at top. 1 inch long. Rooted at base. Not hollow. Dense, easily cut except at base nodule where it was tough. Surface fibrous.

Gills – joined to stem with small notch. Very short gills. Dull light brown. ragged edges. Close.

Spore Print: failed

Microscopic features: Some I haven’t learned to describe but I did easily see
clamp connections in the cap tissue. I could see basidia that hold 4 spore and Pyriform cystidia with large cells internal. I’m not sure what these are as they are about the size and shape of spore. Maybe they are large oil droplets(guttules). ( see photos of all but the clamp connections.)

Spore Size: calculated from gill section of mature cap.

[20/1/1] L (7.0-) 7.5 – 9.8 (-10.0) μm x W (4.1-) 4.3 – 5.8 (-) μm, (L = 8.6 μm, W = 5.0 μm), Q (-1.35) 1.52 – 2.11 (-2.12), Q = 1.76 Elongate


Largest mature cap – 1 inch Diameter
Profile image
1000x – 1 dev = 1 micron. Basidium near bottom and cystidia with droplet above.
cystidia with droplet

Proposed Names

-17% (2)
Used references: www.mushroomexpert.com
-3% (2)
Recognized by sight
45% (2)
Recognized by sight
56% (1)
Eye3 Eyes3
Used references: Rogers mushrooms, Mushroom Expert.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Spore Print – dull brown
By: L G Price (LG_Price)
2015-01-31 18:43:57 PST (-0800)

I finally was able to get a spore print.

Spores look similar to Inocybe lacera, not it but may be closely related.

Tricholoma species
By: L G Price (LG_Price)
2015-01-21 20:11:25 PST (-0800)

I don’t own the book “Tricholoma of NA”, although I am thinking of buying it.

I’ve found 3 types of Tricholoma and haven’t ID’d any of them to species.

However, I think that may be the norm for this area. Untrampled territory.

By: Jacob Kalichman (Pulk)
2015-01-21 20:03:07 PST (-0800)

Any Tricholoma suggestions?

re Cortinarius infractus
By: L G Price (LG_Price)
2015-01-21 19:15:58 PST (-0800)

Well I see a number of things that don’t fit.

1 – The largest mature mushroom was 1 inch across the cap – ie much smaller
2 – The spore is shaped differently and is not verrucose. Spores are elongate. see last photo.
3 – There is no slime layer on the cap, no ixocutis material on cap surface.
4 – There are abundant Cheilocystidia.
5 – I saw saw no rusty color.

Check out Cortinarius infractus
By: Jacob Kalichman (Pulk)
2015-01-21 18:39:10 PST (-0800)
Specifics on Cortinarius ID?
By: L G Price (LG_Price)
2015-01-21 18:15:29 PST (-0800)

What makes you think this is Cortinarious?

Granted, it has a cortina, but I saw no rusty red in cortina due to staining by the spores. I saw no rusty red on the stems or deposited.

Created: 2015-01-20 18:46:15 PST (-0800)
Last modified: 2015-01-31 18:42:38 PST (-0800)
Viewed: 167 times, last viewed: 2016-10-22 10:21:55 PDT (-0700)
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