Evasive agaric

Crepidotus versutus

''Crepidotus versutus'', commonly known as the evasive agaric, is a species of fungi in the family Crepidotaceae. It is saprobic on wood, like other ''Crepidotus'' species, but it can also decompose herbaceous forest litter. The species is characterized by large, punctate, ellipsoid spores, and the white, hairy pileus.

The specific epithet ''versutus'' is derived from the Latin word ''versut'' , which may be a reference to the ability of the fungus to correctly orient itself for growth depending on the position of its growing surface. The basionym of this species is ''Agaricus versutus'' Peck 1878. Older, obsolete synonyms include ''Crepidotus bresadolae'' and ''Crepidotus pubescens''.
Crepidotus versutus differentiated by growth on bark Crepidotus versutus,Geotagged,Summer,United States

Appearance

The pileus is typically 5–14 mm in diameter, initially resupinate, then later turned up. It is attached dorsally or laterally to the substrate. Fan- or kidney-shaped, it is dry, white, and covered with a layer of soft hairs which may or may not be matted. The outer edge is rolled slightly inwards. The context is thin, soft, and white. Both the odor and taste of this mushroom are mild.

The gills radiate from an eccentric or lateral point of attachment, medium broad, and tend to swell in the middle. The gill spacing is sub-distant, with many short gills that do not reach the attachment point. The gills are initially white, then later tinged a rusty-brown color. The spore print is cinnamon-brown in color.

This species has no stipe, although it may have a small tubercle attaching it to its growing surface.

Naming

''Crepidotus applanatus'', the so-called "flat crep", is larger, with a shell-shaped cap, more closely spaced gills, and has conspicuous white mycelial threads at the point of attachment. ''C. herbarum'' has smaller spores and a pale-yellowish spore print.

Distribution

This species may usually be found on the bark of deciduous wood in damp, shaded places. In the Pacific Northwest, it is known to grow on ''Abies'', ''Acer'' and ''Populus'' trees.

Habitat

This species may usually be found on the bark of deciduous wood in damp, shaded places. In the Pacific Northwest, it is known to grow on ''Abies'', ''Acer'' and ''Populus'' trees.

References:

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Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyCrepidotaceae
GenusCrepidotus
SpeciesC. versutus