Observation 19310: Leptonia parva Peck

This specimen keys out (loosely) as Leptonia parva, but it is not a good match.

The color of the pileus is the most similar character, in that it begins blackish blue, and becomes distinctly brown. Largent describes the lamellae as white, although this may be a loose description of the color that I found in this collection – pale cream colored. Quibbling aside, it is more important that they are NOT blue.

The stipe is described by Largent as blue-grey; in these specimens, the stipe was evenly grey with no trace of blue (this is important when the pileus is young and blue-black, thus resembling many other Leptonia).

True cheilocystidia not present.

Largent’s illustration of the spores of L. parva show quite weakly angled spores (for a Leptonia), the spores of this collection were more typically “Leptonioid” – strongly angled.


Copyright © 2009 Christian F. Schwarz
Note darkish blue-grey pileus at far left, brown (mature) second to left, creamy gills at center, and intermediate blue-grey and brown pileus second to far right.
Copyright © 2009 Christian F. Schwarz
Pileipellis of long, cylindrical elements reaching (and originating from) different levels – not a palisade-trichodermium as in L. parva.
Copyright © 2009 Christian F. Schwarz
Stipitipellis at apex.
Copyright © 2009 Christian F. Schwarz

Proposed Names

46% (2)
Recognized by sight: Blue-black pileus when young, becoming distinctly brown in age. Grey stipe.
Used references: Entolomatoid Fungi of the Western United States and Alaska (Largent, 1994)

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
No one has commented yet.