Panus conchatus, commonly known as the lilac oysterling
Very Violet when young:
Older specimens become somewhat lobed:
Panus conchatus, commonly known as the lilac oysterling, is an inedible species of mushroom that occurs throughout the Northern Hemisphere. Its fruit bodies are characterized by a smooth, lilac- or tan-colored cap, and decurrent gills. The fungus is saprophytic and fruits on the decomposing wood of a wide variety of deciduous and coniferous trees. Despite being a gilled species, phylogenetic analysis has shown it is closely related to the pored species found in the family Polyporaceae.
The cap is 5 to 15 centimetres (2.0 to 5.9 in) in diameter, and is initially convex, but later flattens or becomes centrally depressed in maturity. The cap is tan, lilac or reddish-brown, and smooth (glabrous); in age the surface may crack into small flattened scales. The cap margin is enrolled and often has a wavy or lobed outline. The flesh is tough and whitish. The gills are attached in a decurrently (running down the length of the stem), and are narrow and often forked. The gills initially have a violet tinge, but later become an or reddish-violet. The stem is 2 to 3 centimetres (0.8 to 1.2 in) long and 1 to 3 centimetres (0.4 to 1.2 in) thick, roughly the same color as the cap, but covered with violet hairs; it is attached to the cap laterally, or off-center. The spore print is white.
Viewed microscopically, spores are elliptical, smooth, and non-amyloid, with dimensions of 5–7 by 2.5–3.5 µm. The pleurocystidia are either enlarged in the middle (ventricose) or enlarged and spherical at the tip (capitate); these cells have dimensions of 35–45 by 8–11 µm.
Panus conchatus is a saprobic species – deriving nutrition from rotting or decaying organic matter – and fruit bodies can be found on hardwood stumps, logs and sticks, usually crowded together in clusters. Typical hosts include wood of deciduous trees—especially beech, poplar, birch, and oak, and less frequently on ash and elm. Coniferous hosts include fir, spruce, pine, and yew.
Found throughout the Northern Hemisphere, this species has been collected in North America, and Europe.
Although believed to be non-toxic, P. conchatus is not recommended for consumption due to its tough and leathery texture.