''Crepidotus cesatii'', commonly known as the roundspored oysterling, is a species of

saprophytic Saprotrophic nutrition or lysotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of decayed (dead or waste) organic matter. It occurs in saprotrophs, and is most often associated with fungi ...

fungus in the family Crepidotaceae with a stipeless

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

cap A cap is a flat headgear, usually with a visor. Caps have crowns that fit very close to the head. They made their first appearance as early as 3200 BC. The origin of the word "cap" comes from the Old French word "chapeau" which means "head co ...

. It is often found on woody and herbaceous plant debris from many different hosts including conifers, appearing from late summer to winter usually in small scattered groups. Often confused with ''

Crepidotus variabilis ''Crepidotus variabilis'' is a species of saprophytic fungi in the family Crepidotaceae. It is commonly known as a variable oysterling in the United Kingdom and is seen there in autumn. May occur solitary, but more often in small scattered group ...

'', it can be distinguished by its different spores.

Description

Cap A cap is a flat headgear, usually with a visor. Caps have crowns that fit very close to the head. They made their first appearance as early as 3200 BC. The origin of the word "cap" comes from the Old French word "chapeau" which means "head co ...

: The cap (pileus) of ''C. variabilis'' is generally about 0.4 to 2 cm in diameter is white and emerges kidney shaped soon becoming irregular and wavy forming patches of overlapping fruit bodies. The surface is very finely downy to velvety with a margin more or less inrolled. *

Gills A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

: Colour is whitish, then buff-brown with pink flush, fairly distant, decurrent to base. *Spores: The

spore print 300px, Making a spore print of the mushroom ''Volvariella volvacea'' shown in composite: (photo lower half) mushroom cap laid on white and dark paper; (photo upper half) cap removed after 24 hours showing warm orange ("tussock") color spore print. ...

is pinkish-buff, more pink than C. variabilis. Their shape is subspherical and minutely warty, measuring 6.5–8.5 × 5–7

μm The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a unit of length in the International System ...

in size. *Absent features: No stipe (stem) or annulus (ring).

References

Bibliography

*Saccardo, P.A. 1887. Sylloge Hymenomycetum, Vol. I. Agaricineae. Sylloge Fungorum. 5:1-1146 Crepidotaceae Fungi described in 1877 Fungus species {{Agaricales-stub