Observation 141257: Hypholoma humidicola (Murrill) Redhead & Malloch

Growing on bare sandy soil, together with a group of Pseudorhyzina californica. Caps ~1cm, stem rather tough, with enlarged base covered with mycelial stuff.

Spore print faint, some shade of brown. Spores 10-12 × 6-6.5 Cheilocystidia scattered ~25 × 12.5. No pleurocystidia observed. Caulocystidia abundant.


Caulocystidia near top of stipe, and a floating cheilocystidum.

Proposed Names

28% (1)
Recognized by sight
28% (1)
Recognized by sight
43% (2)
Used references: A.H. Smith. 1951. The North American Species of Naematoloma. Mycologia 43: 467-521.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Sava Krstic (sava)
2013-08-02 18:12:56 AEST (+1000)

Debbie and Joshua, thanks for your ID help.

The picture was taken exactly where the mushrooms were growing and there was as much moss as we can see in the picture. They were growing scattered, about 10 of them, in a small (~30 × 50 cm)clear area by the trail, surrounded by bush. (Pseudorhyzinas were under the bush.)

I was thinking Hypholoma myself when I collected them, but when I scoped them, I couldn’t see those large cells under the cap cuticle (indicative of the genus) and any pleurocystidia. So I gave up and dried the collection.

Joshua, thanks for the pointer to the Smith paper.

Not sure about elongatum…
By: Joshua Birkebak (Shua)
2013-07-30 02:57:22 AEST (+1000)

because it was not growing in heavy moss (typically Sphagnum) but Smith describes a species very close to H. elongatum he calls H. humidicola. It differs in habitat, being in conifer debris with some moss (not bogs) and the length of the chrysocystidia. Furthermore it was described from Washington and Smith collected it from around Mt. Hood.

It is a poorly known species though so good luck finding more information about it. but I think this specimen is a good candidate for it. Cool find!

was there moss on the ground?
By: Debbie Viess (amanitarita)
2013-07-30 01:20:08 AEST (+1000)

Check the descriptions on Matchmaker and these micrographs from Canada:


Nifty find, Sava!

Created: 2013-07-29 17:04:31 AEST (+1000)
Last modified: 2013-07-30 05:25:45 AEST (+1000)
Viewed: 82 times, last viewed: 2018-03-16 09:06:00 AEDT (+1100)
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