When: 2011-05-28

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

On mulched horse dung. Thick spore print shows no purple or brown tint against a black background. Gill edges whitish. No signs of partial veil remnants as expected in campanulatus types.

Species Lists


Proposed Names

62% (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


Add Comment
The print seen here has been washed off the board.
By: Dave W (Dave W)
2011-05-31 12:17:51 CDT (-0400)

But I assure you that the print was pure black, with no trace of brown or purple. The photo was indeed snapped at night, with interior lighting. The little bit of textural variation seen nearby the top of the print in reflection of the light. I did try to find the best spot inside the room so that this was minimized. Good eye Byrain!

Spore print picture
By: Byrain
2011-05-31 11:59:16 CDT (-0400)

Could you take another picture in natural sunlight? It helps to see the true color that way.

Thanks tnihekr.
By: Dave W (Dave W)
2011-05-31 00:25:24 CDT (-0400)

The lack of a dark band encircling the outer part of the cap threw me off the trail to cinctulus. Everything else… most notably, the non bell shaped caps… fits well.

By: Jimmie Veitch (jimmiev)
2011-05-30 12:33:37 CDT (-0400)
saccardo vs britzelmayr
By: Jimmie Veitch (jimmiev)
2011-05-30 12:12:51 CDT (-0400)

listed authors are bolton and saccardo from 1887 on index fungorum, why are there 46 observations with bolton and britzelmayr listed as the authors?

Closest thing I can find is
By: Dave W (Dave W)
2011-05-30 09:50:43 CDT (-0400)

Panaeolus acuminatus, as described by Kuo.


But, the ones seen here have caps that are neither bell shaped nor conic. Actually, the broadly convex tannish caps seem a bit unusual for Panaeolus. The spores for this collection are a bit small for acuminatus; but a few of them show the “lemon shape” that Kuo mentions.