Public Description of Psathyrella pseudovernalis A.H. Sm.

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Name: Psathyrella pseudovernalis A.H. Sm.
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Psathyrellaceae

General Description:

Cap: 2-4.5 cm; convex, broadly conical, broadly bell-shaped, or nearly flat at maturity; bald; the margin finely lined; medium yellow-brown, fading markedly as it dries out to brownish buff; when young with wisps of veil tissue, especially along the margin.

Gills: Attached to the stem; close or nearly distant; whitish to pale brownish at first, becoming dark brown.

Stem: 3-10 cm long; up to 5 mm thick; equal; fragile; white but often discoloring dirty yellowish to brownish in the middle with maturity; bald or very finely silky; without a ring.

Flesh: Thin; fragile; brownish.

Odor and Taste: Not distinctive.

Chemical Reactions: KOH on cap surface at first negative but turning purplish after 60-90 seconds.

Spore Print: Dark brown.

Microscopic Features: Spores 7.5-9.5 × 4-5.5 µ; ellipsoid; with a pore; smooth; dark brown in KOH. Pleurocystidia fusoid-ventricose; thin-walled; to about 70 × 15 µ. Cheilocystidia subfusiform; infrequent; thin-walled. Sphaeropedunculate elements on gill edge abundant; subglobose, without apical necks. Pileipellis hymeniform/cellular.


widely distributed in North America.

Saprobic; growing scattered to gregariously or in small clusters in hardwood forests, often near woody debris; spring

Look Alikes:

Other Psathyrella species.


Kuo, M. (2011, January). Psathyrella pseudovernalis. Retrieved from the MushroomExpert.Com Web site:


Current Name:
Psathyrella pseudovernalis A.H. Sm., Mem. N. Y. bot. Gdn 24: 410 (1972)

The name “Psathyrella vernalis,” as it is applied by Moser (1955, 1983) and by Hansen & Knudsen (1992), probably represents the same mushroom. Smith separated his North American species, Psathyrella pseudovernalis, for a single, very dubious reason: “P. vernalis, a European species, apparently has paler spores.” However, use of the name Psathyrella vernalis is complicated by the fact that it is illegitimate (it represents a homonym for a different species named by Velenovsky) and by the fact that Kits van Waveren (1985) reduced the species to a mere “form” of Psathyrella spadiceogrisea (along with Orton 1986 and Hansen & Knudsen 1992 I disagree on this point).

Description author: walt sturgeon (Request Authorship Credit)

Created: 2014-01-06 14:58:08 PST (-0800) by walt sturgeon (Mycowalt)
Last modified: 2014-01-06 14:58:08 PST (-0800) by walt sturgeon (Mycowalt)
Viewed: 11 times, last viewed: 2018-10-31 13:00:01 PDT (-0700)