Inosperma vinaceobrunneum is found in the Eastern United States.
An eye-catcher of an Inocybe, Inosperma vinaceobrunneum often exhibits a dark red/purple coloration. The collection featured here was growing from clay/limestone soil near a creek bed. The largest cap was 6cm wide. Was found in deciduous woods dominated by oak with beech, hickory, maple, poplar and sycamore present. August. (Occurrence map/collection data). Inocybe vinaceobrunneum is a synonym/former name. Called Inocybe adaequata, a European species, for many years in North America.
Generally large in size (up to 8cm). The cap color is described as vinaceous (wine-colored) brown (purple/brown). Center can be a dusky red/purple, dark brown to almost black. Conical, convex to campanulate, often with a large umbo at center; margin incurved when young, upturned with age. Cap is not scaly. Lines of fiber radiating from the center of the cap. The flesh can have pink/reddish tones. Gills are attached and close in spacing; gray when young becoming brownish, will sometimes show reddish spots. Stem is even; slightly bulbous base at times; streaked with reddish lines with white undertones. Solid context; red staining base.
The odor is variously described as sickly sweet, aromatic and sometimes like green corn, or unpleasant; could depend on the nose and/or the collection. Always smell your mushrooms. Don’t forget! And, while tasting mushrooms is often helpful with identification (Russulas and boletes, e.g.) it is not a recorded feature with Inocybe related mushrooms.
This mushroom is a mycorrhizal partner with hardwoods of Eastern North America; oak frequently present. Inosperma vinaceobrunneum can be found June-August; can occur into September, but July and August appear to be prime time when checking iNaturalist observations.
Microscopic features of Inosperma vinaceobrunneum
Resources: