Synonyms: Acanthocystis auriscalpium, Pleurotus auriscalpium, Pleurotus petaloides.
Common name: spatula oyster.
Hohenbuehelia auriscalpium is a species of fungus that belongs to the family Tricholomataceae. It is characterized by its fan-shaped or semicircular cap, typically 1-4 cm in diameter, with a wavy or lobed margin and a hairy or velvety surface. The gills are decurrent, meaning they extend down the stem, and the spores are white to pale yellowish. In East and Central Texas, Hohenbuehelia auriscalpium can be found growing on decaying wood, particularly on logs, stumps, and other dead tree material, often in association with hardwoods such as oak and elm. It typically fruits from spring to fall, with a peak in summer months. The fungus is relatively common in the region, particularly in moist, wooded areas with rich soil and abundant organic matter.
Underside of a mushroom Hohenbuehelia auriscalpium(?) from base of a burned pine in Bastrop State Park. Bastrop, Texas, April 15, 2023
Lost Pines Trail, Bastrop County, Texas, 78602, United States
Mushroom Hohenbuehelia auriscalpium(?) from base of a burned pine in Bastrop State Park. Bastrop, Texas, April 15, 2023Lost Pines Trail, Bastrop County, Texas, 78602, United States
Spores (in lugol) of a mushroom Hohenbuehelia auriscalpium(?) collected in Bastrop State Park. Bastrop, Texas, April 15, 2023
Spores of a mushroom Hohenbuehelia auriscalpium(?) collected a day before in Bastrop State Park. Texas, April 16, 2023Observations of the fungus Hohenbuehelia auriscalpium in East and Central Texas reveal its presence in specific environments. The mushroom was found at the base of a burned pine in Bastrop State Park, suggesting it may thrive in areas with disturbed or charred vegetation. The underside of the mushroom was observed, providing insight into its morphology. Spores were collected and examined using lugol, allowing for further identification and characterization. Additional spore samples were collected the following day, indicating the fungus's potential for rapid growth and reproduction. These findings contribute to a better understanding of Hohenbuehelia auriscalpium's habits and distribution in East and Central Texas, specifically within the context of post-fire ecosystems like Bastrop State Park. The observed specimens were documented on April 15 and 16, 2023.
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