Observation 18754: Russula Pers.
When: 2009-02-22
Herbarium specimen reported

Notes: Taste very acrid, odor somewhat fresh-fragrant.

Pileus mostly pale yellowish-white, margins with a pink blush in some places. Margin of pileus obscurely tuberculate-striate in some places, on some basidiomes.

Spores white in deposit. Microscopically: 8.1 × 7.6 μm, with nearly complete reticulum, some warts nearly 1 micron high.

Pileocystidia SV+, septate, and with globular intracellular contents.
Cheilocystidia mucronate or clavate. Cheilocystidia mucronate, 40 μm long.

Context of stipe reddish in FeSO4, surface negative.
Pileus surface negative in guaiac.
Lamellae blue in guaiac.

Stipe becoming grayish when dried.

Images

37228
Copyright © 2009 Christian F. Schwarz
37229
Copyright © 2009 Christian F. Schwarz
Note slightly sulcate margin, white spore deposit, and pale pink tones.
37230
Copyright © 2009 Christian F. Schwarz
Note globular content of pileocystidia in SV.
37231
Copyright © 2009 Christian F. Schwarz
Note extensive reticulum.

Proposed Names

13% (2)
Eye3
Recognized by sight: White spores, pale yellowish cap with pink flushes, taste very acrid.
Used references: Agaricales of CA, Mike Davis’ Russula of N. CA
Based on microscopic features: Nearly complete reticulum of spores, pileocystidia SV+
53% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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cap colour
By: Andreas Gminder (mollisia)
2010-08-01 16:40:33 MDT (-0600)

Russula raoultii never has pinkish hues, but is pure pale yellow with greenish shade, at least in the original sense of Quélet.

Created: 2009-02-22 18:30:23 MST (-0700)
Last modified: 2010-08-01 16:39:29 MDT (-0600)
Viewed: 55 times, last viewed: 2016-07-30 20:26:06 MDT (-0600)
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