Observation 174495: Lactarius subpurpureus Peck
When: 2014-08-17
(39.8129° -74.5451° )
No herbarium specimen

Notes: A group of three specimens growing near/on the abandoned railroad running through a cedar bog. The pictured mushroom was growing out of the side of a well-rotted railroad tie. The color of the latex (vinaceous-red) helped eliminate the two look-alikes (L. chelidonium and L. paradoxus).

The spores clumped in Melzer’s in such a way that the preferred orientation was not the lateral view. However, measuring the ones I could find in the lateral view with the apiculus visible as well as those in the presumed later view with the apiculus down revealed that the length was mostly in the 7-8 um range. I found a few “giants” that were 8.5 um long, but that was the largest reading. These measurements contradict the reported length of 8-11 um (Phillips & Bessette) and 8-12 um (Kuo). The observed width was also proportionally smaller than the reported values of 6.5-8 um. At the same time, the observed ornamentation and wart height was in line with the literature description.


Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 um
Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 um

Proposed Names

57% (1)
Used references: Milk Mushrooms of North America by Bessette-Harris-Bessette

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Nice ’scope! Have
By: Martin Livezey (MLivezey)
2014-09-14 08:32:05 COT (-0500)

you tried measuring spores in anyway besides comparing them with a reticle of some type on screen? I am thinking of computer programs made for this purpose. They may need to work from a digital image that is calibrated to your scope.

Thanks, Martin
By: I. G. Safonov (IGSafonov)
2014-09-14 00:05:30 COT (-0500)

Yes, this is my scope — Accuscope 3000 LED series. It’s easy to work with and the optics are decent. The pix are taken though one of the eyepieces with a hand-held camera, so you can imagine that the images seen by the eye are better in quality.

Beautiful mushroom
By: Martin Livezey (MLivezey)
2014-09-13 18:39:18 COT (-0500)

and very nice microscopy. Is that your scope?

Created: 2014-08-18 20:47:02 COT (-0500)
Last modified: 2014-08-20 23:31:44 COT (-0500)
Viewed: 30 times, last viewed: 2016-04-12 20:57:43 COT (-0500)
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