Synonyms: Agaricus applanatus, Agaricus globiger, Agaricus putrigenus, Crepidotus globiger, Crepidotus putrigenus.
Common names: flat oysterling, Flat Crep.
Crepidotus applanatus is a small to medium-sized, fan-shaped or semicircular fungus with a wavy or lobed margin, typically 1-4 cm in diameter. The cap is grayish-brown to brown, often with a paler margin, and the surface is smooth to slightly wrinkled. The gills are crowded, narrow, and pale yellowish-brown. In East and Central Texas, it is commonly found growing on decaying logs, stumps, and other dead wood, particularly in deciduous forests dominated by oak, elm, and maple trees. Fruiting typically occurs from spring to fall, with peak abundance in late summer and early fall.
Oysterling mushrooms Crepidotus applanatus(?) on a log in Lick Creek Park. College Station, Texas, April 5, 2018
Raccoon Run, College Station, TX 77845, USA
Caps of oysterling mushrooms Crepidotus applanatus(?) in Lick Creek Park. College Station, Texas, April 5, 2018Raccoon Run, College Station, TX 77845, USA
Flat oysterling mushrooms (Crepidotus applanatus(?)) on an oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 6, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Underside of flat oysterling mushrooms (Crepidotus applanatus(?)) on an oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 6, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Caps of flat oysterling mushrooms (Crepidotus applanatus(?)) on an oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 6, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Gills of flat oysterling mushrooms (Crepidotus applanatus(?)) on an oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 6, 2021Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Flat oysterling mushrooms (Crepidotus applanatus) on a log in Little Thicket Nature Sanctuary. Cleveland, Texas, June 4, 2022San Jacinto County, Texas, United States
Flat oysterling mushrooms (Crepidotus applanatus) on a log on Iron Bridge Trail in Lick Creek Park. College Station, Texas, April 29, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Underside of flat oysterling mushrooms (Crepidotus applanatus) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, April 29, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Gills of flat oysterling mushrooms (Crepidotus applanatus) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, April 29, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Spores of flat oysterling mushrooms (Crepidotus applanatus), in KOH (spore print brown), collected in Lick Creek Park. College Station, Texas, April 29, 2023Observations of Crepidotus applanatus in East and Central Texas reveal the fungus grows on logs, often oak, in various locations including Lick Creek Park, Sam Houston National Forest, and Little Thicket Nature Sanctuary. The mushrooms were found during different times of the year, including April, June, and October. They exhibit a flat cap shape and have gills underneath. Spore prints collected from the mushrooms turned brown in KOH. Multiple sightings occurred on trails such as Caney Creek Trail and Iron Bridge Trail, suggesting the fungus is widespread in the region. The observations span several years, from 2018 to 2023, indicating a consistent presence of Crepidotus applanatus in East and Central Texas. The fungus appears to thrive in wooded areas with abundant decaying wood.
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