Observation 135706: Panaeolus cinctulus (Bolton) Britzelm.

When: 2013-06-07

Collection location: Sumner Co., Tennessee, USA [Click for map]

36.4689°N 86.4963°W 283m

Who: Christine Braaten (wintersbefore)

Project: Panaeolus

No specimen available

Notes:
CCB166
Microscopic notes for 134270: http://mushroomobserver.org/134270?q=1ILFF

Images

Basidia were predominantly two-sterigmate, however 4-spored basidia were ovserved. 15-30 × 8-10 microns.
Basidia were predominantly two-sterigmate, however 4-spored basidia were ovserved. 15-30 × 8-10 microns.
Caulocystidia
Caulocystidia
Pileipellis at 20x and 100x, pileis trama weakly dextrinoid.
Pileipellis at 20x and 100x
Spore average 12.35 × 9.37 microns, Q-value 1.32
Spore average 12.35 × 9.37 microns, Q-value 1.32
Spore average 12.35 × 9.37 microns, Q-value 1.32
40x, KOH, lots of basidia, no sulphidia.
40x, KOH, lots of basidia, no sulphidia.
40x, KOH, lots of basidia, no sulphidia.
40x, KOH, lots of basidia, no sulphidia.
Cheilocystidia
Cheilocystidia
Cheilocystidia
Cheilocystidia
12.82×9.77
12.94×8.98
11.9×10.12
13.1×9.6
12.09×9.36
12.33×9.59
12.51×9.15
10.28×7.96
13.2×9.78

Proposed Names

9% (2)
Recognized by sight: The species concept of Agaricus (Panaeolus) cinctulus is based on a drawing made by Bolton in 1791. No type collection exists. Since it is not possible to know whether Bolton’s species was Panaeolus subbalteatus, P. olivaceus or P. fimicola, I consider Panaeolus cinctulus to be a nomen dubium.
Based on microscopic features: The gill faces need to be checked for sulphidia; the presence of these would indicate that it is probably Panaeolus fimicola.

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= Observer’s choice
= Current consensus

Comments

Add Comment
Great observation
By: Byrain
2014-02-09 21:10:24 CST (-0600)

Smooth spores, oblique germ pore, broad cheilocystidia & no sulphidia, all shown/recorded!

Oh my
By: Justin (Tmethyl)
2013-06-07 19:24:57 CDT (-0500)

These are brilliant, well done WB.
I could look at these for hours lol.

Created: 2013-06-07 19:06:07 CDT (-0500)
Last modified: 2014-02-09 21:08:23 CST (-0600)
Viewed: 387 times, last viewed: 2019-02-14 18:05:53 CST (-0600)
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