Crepidotus applanatus: The Ultimate Mushroom Guide
About The Crepidotus applanatus Mushroom
Crepidotus applanatus is a species of fungi in the family Crepidotaceae. It is a tiny, kidney-shaped fungus that appears on dead wood of deciduous broadleaf trees. The attachment is sessile (having no stem).
Uncommon but quite widely distributed in woodlands throughout mainland Europe and is also recorded in many other parts of the world including North America.
These small, stalkless, white mushrooms are sometimes mistaken for small oyster mushrooms, Pleurotus ostreatus. Crepidotus species have brown spore prints whereas oysters have white to lilac spore prints.
Other names: Flat Crep.
Crepidotus applanatus Identification
Saprobic; growing gregariously or (more commonly) in overlapping clusters on dead hardwood stumps and logs; summer and fall; widely distributed in North America.
1-4 cm; shell-shaped or petal-shaped; somewhat flabby; smooth or finely velvety (towards the point of attachment) in all stages of development; the margin often slightly lined; white, becoming brownish to pale cinnamon-brown; hygrophanous.
Close or crowded; whitish, becoming brownish in maturity.
Absent. Rarely, when conditions force the mushroom to grow straight upwards rather than in a shelf-like position, the cap may be nearly circular, creating the illusion of a rudimentary "stem" where the mushroom attaches to the wood.
Odor and Taste
Odor not distinctive; taste mild.
Spores 4-6 µ; globose; very finely punctate or roughened (often hard to discern even with oil immersion). Pleurocystidia absent. Cheilocystidia variously shaped; up to 50 x 12 µ. Pileipellis a cutis with occasional erect elements. Clamp connections are present.
Crepidotus applanatus Look-Alikes
Has a scalloped margin.
Has a transparent cuticle layer that is evident when the cap is stretched.
Crepidotus applanatus Taxonomy & Etymology
The Flat Oysterling was described in 1796 by Christiaan Hendrik Persoon, who established its basionym when he gave it the binomial scientific name Agaricus applanatus. It was German mycologist Paul Kummer who, in 1871, transferred this species to the genus Crepidotus, whereupon it acquired its currently accepted scientific name Crepidotus applanatus.
Synonyms of Crepidotus applanatus include Agaricus applanatus Pers., Agaricus putrigenusÂ Berk. & M.A. Curtis, and Crepidopus putrigenusÂ (Berk. & M.A. Curtis) Sacc.
The generic name Crepidotus comes from crepid- meaning a base, such as a shoe or a slipper (although some sources state that it means 'cracked'), and otus, meaning an ear - hence it suggests a 'slipper-like ear'.
Crepidotus applanatus profile
Help Improve Ultimate Mushroom
If you find an error or you want to add more information about the mushroom please click here.