Observation 153338: Tricholoma virgatum (Fr.) P. Kumm.
When: 2013-11-18

Notes: Growing in a Sitka spruce habitat.
Caps up to 7.2 cm across.
Spore print white.
Spores ~ 8 X 6.5 microns, broadly ellipsoid and smooth.

Proposed Names

46% (2)
Recognized by sight: pale, non-streaked cap w/sub-acute umbo. grows w/spruce.
can be similar to virgatum, which has an acutely conic umbo and a darker, streaked gray cap.
Used references: Tricholomas of NA, Bessetes, Roody and Trudell.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Spore size
By: I. G. Safonov (IGSafonov)
2013-11-20 19:38:41 PST (-0800)

The spore width is well outside of the upper range for T. argenteum. The spores captured in the pic are in the correct alignment for measurement and are clearly over 6 um wide. The average Q values for argenteum and virgatum are 1.52 and 1.22, respectively. Other than that the visible morpohology, especially non-virgate, pale gray caps and less acute umbo, suggest argenteum.

Created: 2013-11-20 13:14:49 PST (-0800)
Last modified: 2013-11-20 21:01:58 PST (-0800)
Viewed: 57 times, last viewed: 2016-10-26 11:17:12 PDT (-0700)
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