Observation 21193: Leptonia subviduensis Largent var. subviduensis

When: 2009-03-05

Collection location: University of California Santa Cruz, Santa Cruz Co., California, USA [Click for map]

Who: Christian (Christian Schwarz)

Specimen available

Pileus: nearly black, blue tones present but fairly obscure.
Lamellae: white, often with faint but definitely bluish cast, sometimes with obvious blue tones, transvenose.
Stipe: greyish blue, slightly to distinctly striate.

Cheilocystidia: absent
Spores: < 10 microns (9.6 avg)

Pileipellis with transitions to a trichoderm.
Dominant pigment intracellular and globular in pileipellis (in saturated NaCl solution), perhaps also parietal (see photo).
Subpellis and upper pileus trama with strange small blue granules in NaCl solution (see photo).

The most important features here are:
1. Nearly black, opaque to v. obscurely striate pileus
2. Blue-washed white lamellae
3. Lack of cheilocystidia
4. Spores with Lavg < 10 microns.

Overall, rather similar to L. decolorans but that species has cheilocystidia.

Species Lists


Copyright © 2009 Christian F. Schwarz
Basidiomes in situ.
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Pileipellis at disc stained with Congo Red.
Copyright © 2009 Christian F. Schwarz
Pileipellis away from disc in NaCl solution.
Copyright © 2009 Christian F. Schwarz
Spores at 1000x, Congo Red and KOH.
Copyright © 2009 Christian F. Schwarz
Spores at 1000x, Congo Red and KOH.

Proposed Names

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
next winter?
By: Shane Marsh (Mushane)
2009-05-22 01:42:08 CDT (-0400)

ill be starting cabrillo in august, I doubt ill be able to finish my pre-requisites by that time :P

but we should definitely go for a small foray!

Hi Shane…
By: Christian (Christian Schwarz)
2009-05-21 23:39:21 CDT (-0400)

Yep I’m on campus, and you should transfer before next winter – I’ll be teaching a mushroom class!
We should meet up sometime even if you transfer later.

By: Shane Marsh (Mushane)
2009-05-21 20:26:04 CDT (-0400)

great campus for mushroom hunting, keep your eyes peeled for Agaricus augustus out there under the redwoods, I found them year round around the campus area and up in those mountains.

you currently attending UCSC?
ill be transferring there from Cabrillo sometime in the next year or two.

and great pics!

Created: 2009-05-21 18:41:57 CDT (-0400)
Last modified: 2009-05-21 18:41:57 CDT (-0400)
Viewed: 118 times, last viewed: 2017-06-05 23:45:40 CDT (-0400)
Show Log