Observation 46632: Hebeloma mesophaeum (Pers.) Quél.

When: 2010-06-05

Collection location: Yosemite National Park, California, USA [Click for map]

Who: Douglas Smith (douglas)

Specimen available

Found under mixed conifer forest.

Part of the Yosemite fungal survey.

sample num. YNP210

Found at Yosemite west gate parking area.

Location: lat 37.803 long -119.874
Elevation: 5000

With a slight raphanoid odor. Light fibrous partial veil obs., with brown spore deposit. Veil disappears on many.

This is what people have been calling Hebeloma mesophaeum in the western US, but who knows if it is really or not.

7/20/2010 – adding some micro-details

The first micro-shot is of the gill edge at 400x in Meltzer’s. Here the cheilocystidia are numerous on a non-fertile edge. They are mostly cylindrical, some bent, some with a slight thickened base, all with blunt even ends. No pleurocystidia were obs.

The second micro-shot is of spores from the gill at 1000x in Meltzer’s. The spores are ellipsoid and beaned shaped, lightly roughen surface (hard to see in a photo), rounded ends, and no reaction to Meltzer’s. Roughly 8.5 um long.

Putting this together, this agrees pretty well with H. mesophaeum, so I wasn’t bad with the id. This is described fairly well in “Veiled Hebeloma of Western US” Smith, Evenson, Mitchel (1983). I think one of the very few times I’ve id’ed a mushroom using this book that I actually believe.

Species Lists



Proposed Names

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No one has commented yet.

Created: 2010-06-11 12:42:03 PDT (-0700)
Last modified: 2013-12-03 10:25:17 PST (-0800)
Viewed: 86 times, last viewed: 2018-11-25 07:09:25 PST (-0800)
Show Log