Hohenbuehelia petaloides

Hohenbuehelia petaloides, commonly known as the leaflike oyster or the shoehorn oyster mushroom, is a species of agaric fungus belonging to the family Pleurotaceae. The fruit bodies have pale to brown funnel-shaped caps with decurrent gills and are considered edible. The species has a cosmopolitan distribution and is found near the decaying wood it feeds on.

Taxonomy
The species was first described in 1785 by Jean Baptiste François Pierre Bulliard. It was later assigned to the new genus, Hohenbuehelia, in 1866 by Stephan Schulzer von Müggenburg. Synonyms include Hohenbuehelia geogenia and Pleurotus petaloides.

Description
The cap ranges from fan-shaped to funnel-shaped, growing up to 10 cm wide. The cap surface is smooth or microscopically hairy and ranges in color from pale or whitish (often when young) to brown. The gills are decurrent and are often crowded and narrow. The stem is either absent or short and attached laterally. The texture is tough or rubbery due to the gelatinous layer under the cuticle. The mushroom has a mealy taste and odor and is considered edible, although the tough texture may not be appealing.

Habitat and distribution
The species is saprobic, feeding on decaying wood. It can be found either alone or clustering in small groups around woody debris or the occasional stump. The species is considered to have a cosmopolitan distribution and is known to be found in regions including North America, Venezuela, Europe, Japan, and New Zealand. Like most Pleurotaceae, it is nematophagous.