Observation 209906: Lactarius petersenii Hesler & A.H. Sm.
When: 2015-07-13
No herbarium specimen

Notes: > A scattered group of several fruiting bodies growing in the middle of the blue-blaze trail in mixed woods (pitch pine and oak) of the Speedwell section of FPP.
> Injured gills instantly oozed copious pinkish-brown latex; the latex eventually stained the gills brown upon drying.
> Odor not entirely unpleasant, but sharp and rather acrid.
> Keyed out well and matched the description and pix in the milkcap book.
> The wording in the books suggests hemlock as the symbiont, but there surely no hemlock in the NJ Pine Barrens!

Microscopy:
Amyloid in Melzer’s;
[20/1/1/]: L x W = 8.6-10.5 (-11.2) x (6.7-) 7.0-9.3 (-9.8) μm;
L x W = 9.5 × 7.7 μm;
Q = (1.12-) 1.13-1.33; subglobose (3 spores) to broadly ellipsoid to low range ellipsoid (17 spores); Q = 1.23

Images

538127
538128
538129
539354
Mounted in Melzer’s and viewed at x1000; 1 div. = 0.465 μm
539355
Mounted in Melzer’s and viewed at x1000; 1 div. = 0.465 μm

Proposed Names

57% (1)
Eye3 Eyes3
Used references: Milk Mushrooms of North America by A.E. Bessette, D.B. Harris and A.R. Bessette

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Spore measurements & pix posted
By: I. G. Safonov (IGSafonov)
2015-07-16 22:08:47 CDT (-0400)

Created: 2015-07-13 22:53:11 CDT (-0400)
Last modified: 2015-07-16 22:07:59 CDT (-0400)
Viewed: 29 times, last viewed: 2016-10-28 08:47:30 CDT (-0400)
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