Observation 92956: Gymnopus (Pers.) Roussel

When: 2012-04-18

Collection location: Kahite Trail, Vonore, Tennessee, USA [Click for map]

35.0° 84.0°

Who: Christine Braaten (wintersbefore)

Specimen available

Habitat: On mulch and in grass along roadside. Very common, often clustered.
Width of cap: 1.5 cm
Length of the stip: 2-4cm
Cap: brown but drying to buff.
Stipe: covered with vinaceous fuzz
Lamellae: adnate
Spore print: white
Spores: smooth, elliptical/lacrymoid approx 8×4 microns.

*Still need to test if this has an alkaline reaction.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks for your comments
By: Christine Braaten (wintersbefore)
2012-04-23 12:49:40 PDT (-0700)

G. spongiosa looks really good.

I am going to suggest the name for now and will update later with KOH reaction.

With hydroxide(s)
By: Roy Halling (royh)
2012-04-23 09:13:57 PDT (-0700)

either KOH or ammonia, you can duplicate the green reaction. G. alkalivirens has granular pigment in the lamellar trama and G. semihirtipes has that pigment present only in the stipe trama. Make a mount of the dried material in water to see the pigment granules; add hydroxide and the greening comes. See Mycologia 73: 634-642. 1981. G. spongiosa is a third member of this group. Nice find!

Should be the same
By: Christine Braaten (wintersbefore)
2012-04-22 08:31:24 PDT (-0700)

as this observation, I collected these from the same location a couple weeks prior: http://mushroomobserver.org/91467?q=DMIp

Could be
By: Roy Halling (royh)
2012-04-22 05:27:45 PDT (-0700)

G. alkalivirens. It’s the right time of year and the stipe color looks right for it. At least that’s what I remember.

Created: 2012-04-18 16:43:57 PDT (-0700)
Last modified: 2012-04-23 13:19:16 PDT (-0700)
Viewed: 128 times, last viewed: 2017-06-12 20:04:21 PDT (-0700)
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