Pleurocybella porrigens

On decaying coniferous wood, particularly of Picea or Abies, with a semicircular, shell- to fan-shaped pileus with an undulating margin, 3 to 7 cm across, white to cream, smooth surface, white lamellae turning cream with age, stipe absent (sessile, attached laterally to the substrate), pleasant fungal odour, and mild taste.

Pileipellis composed of cylindrical, hyaline, densely interwoven hyphae 3 to 5 µm wide, with abundant emergent hair-like terminal ends, septate with clamp connections.

Cystidia and other sterile hymenial elements absent.

Basidia cylindrical-clavate, 30 to 35 µm long, 5 to 7.5 µm wide, clamped at the base, 4-spored.

Spores subglobose, smooth, hyaline, thin-walled, 5.5 to 7.5 µm long, 4.5 to 6.5 µm wide, with an evident apiculus at one pole, containing oil guttules, inamyloid in Melzer's reagent.