Variable Oysterling

Crepidotus variabilis

Crepidotus variabilis is a tiny, kidney-shaped fungus that appears on dead twigs of broad-leaved trees in autumn and winter. The attachment is virtually always sessile (having no stem).
Small white oyster mushrooms the tops of these mushrooms are pretty boring, but the undersides are quite beautiful  Crepidotus variabilis,Fall,Geotagged,United States,Variable Oysterling

Appearance

Cap
The cap is initially white, turning creamy-ochre with age. The fruitbody is nearly always laterally attached to its substrate - usually small twigs - via its cap, rather than with a stipe.

Typically 0.5 to 2cm in diameter and often slightly lobed.

Gills
The gills, which radiate from the point of attachment, are moderately crowded. White at first, they gradually turn yellow-brown or buff.

Stem
Almost invariably this little woodland mushroom has no stipe (stem) at all.

Spores
Ellipsoidal, ornamented with minute spiny warts, 5-7 x 3-3.5um.

Spore print
Pinkish buff.
Variable oysterling  Crepidotus variabilis,Fall,Geotagged,United States,Variable Oysterling

Distribution

America and Europe

Habitat

Saprobic, on twigs in deciduous and mixed woodland

References:

Some text fragments are auto parsed from Wikipedia.

http://www.first-nature.com/fungi/crepidotus-variabilis.php
Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyCrepidotaceae
GenusCrepidotus
SpeciesCrepidotus variabilis