Synonyms: Acanthocystis applicatus, Agaricus rhacodius, Agaricus trichotis, Dendrosarcus rhacodium, Geopetalum rhacodium, Pleurotus applicatus, Pleurotus rhacodium, Pleurotus trichotis, Resupinatus applicatus, Resupinatus rhacodium.
Common name: hairy oysterling.
Resupinatus trichotis is a small to medium-sized, poroid fungus that grows on dead wood, typically deciduous trees. It has a semicircular to kidney-shaped cap, 0.5-2 cm wide, with a hairy to velvety surface and white to cream-colored pores. In East and Central Texas, it is commonly found on fallen branches and logs, particularly those of oak and elm, from spring to fall. The fungus produces fruiting bodies that are often resupinate, meaning they grow flat against the substrate, but may also be effused-reflexed or stipitate. Microscopic features include cylindrical to narrowly clavate spores, 4-6 μm long, and hyphae with clamp connections.
Observations of Resupinatus trichotis in East and Central Texas reveal distinct characteristics. In Hensel Park, College Station, Texas, on February 28, 2018, the gills of Resupinatus trichotis mushrooms were observed to be densely packed and finely textured. The mushrooms themselves were small in size, typically growing in close proximity to each other. At the same location, additional observations noted that the mushrooms had a delicate appearance, with caps that were often slightly convex or flat. The stems of the mushrooms were thin and short, supporting the small caps. These observations suggest that Resupinatus trichotis thrives in the humid environment of Hensel Park, where it can be found growing on decaying wood or other organic matter. The species' small size and delicate features make it a notable find in East and Central Texas.
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