Synonym: Amethicium leoninum.
Hyphoderma leoninum is a crust fungus that grows on decaying wood, characterized by its thin, membranous to crustose basidiocarp, and smooth, waxy to velvety hymenial surface. In East and Central Texas, it has been found on various deciduous and coniferous substrates, including oak, pine, and cedar, often in moist, shaded areas. The fungus produces small, cylindrical spores, typically 5-7 x 2-3 μm in size, and is commonly encountered during the spring and fall months when humidity is high.
Observations of the fungus Hyphoderma leoninum in East and Central Texas reveal its presence on fallen oaks. On December 12, 2021, a light brown corticioid fungus, identified as Hyphoderma leoninum, was found on a fallen oak on Caney Creek Trail in Sam Houston National Forest. The fungus had a distinctive appearance with a white margin. Another observation on the same trail and date noted a similar light brown corticioid fungus with a white margin on a fallen oak, also identified as Hyphoderma leoninum. These findings suggest that Hyphoderma leoninum is present in the region, specifically in Sam Houston National Forest, and can be found growing on decaying oak wood. The consistent appearance of the fungus with a white margin was noted in both observations.
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