Observation 178011: Lactarius deceptivus Peck
When: 2014-09-12
(39.7753° -74.5328° )
No herbarium specimen

Notes: > R. brevipes, L. deceptivus, L. piperatus are common enough in the NJ Pinelands, so eventually you stop paying close attention to them and start assigning names without picking them up and studying them.
> This one had neither a noticeably enrolled margin of L. deceptivus nor the super-crowded gills of L. piperatus.
> KOH stained flesh pale yellow (L. deceptivus should be negative). Iron (II) sulfate produced a brownish-pink reaction, consistent with L. deceptivus.
> Both the milk and flesh are hot/acrid, but not as one would expect of L. deceptivus.

Microscopy:
Amyloid in Melzer’s;
[20/1/1]: L x W = (9.3-) 9.8-12.6 x (6.5-) 7.0-7.9 μm
L’ x W’ = 11.2 × 7.4 μm
Q’ = 1.52; ellipsoid to elongate spores with a dense cover of isolated spines/warts of 0.5-0.75 μm tall

Images

455031
455032
455033
474204
Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 micron
474205
Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 micron

Proposed Names

-57% (1)
Recognized by sight
28% (1)
Eye3 Eyes3
Based on microscopic features: Large spores eliminate all look-alikes — see the notes section

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Measurements and pix of spores posted
By: I. G. Safonov (IGSafonov)
2014-10-25 23:03:32 PDT (-0700)

Created: 2014-09-13 00:10:23 PDT (-0700)
Last modified: 2014-10-25 23:01:33 PDT (-0700)
Viewed: 35 times, last viewed: 2016-10-23 16:41:10 PDT (-0700)
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