Omphalotus olearius (DC. ex Fr.) Sing. syn. Clitocybe olearia (Fr. ex DC.) Maire Ölbaumpilz Clitocybe de l'olivier, Pleurote de l'olivier. Cap 5–10cm across, strongly depressed to funnel-shaped, bright orange. Stem 40–140 x 7–28mm, wavy and tapering towards the base, paler than cap. Flesh yellowish, darkening towards the stem base. Taste not distinctive, smell strong and unpleasant. Gills decurrent, golden to orange. Spore print white. Spores subglobose, 5–7´4.5–6.5m. Habitat on the roots or at the base of trunks of certain trees; oak and chestnut in Britain, frequently on olive in Europe. Season autumn. Distribution, Europe. Very rare. Poisonous.
This fungus may be seen to glow in the dark, the phosphorescence coming from the gills when the spores are mature.