Hygrophorus russula

A species associated with holm oak woods (Quercus ilex), with a preference for calcareous soils.

Pileipellis filamentous: upper layer composed of densely interwoven hyphae, 4-6 µm wide, widely separated by gelification, with reddish-brown intracellular pigment; beneath this layer lie more hyaline hyphae, arranged more or less parallelly to slightly interwoven, septate with clamped septa.

Gill edge without differentiated cystidial elements.

Lamellar trama bilateral.

Basidia cylindric-clavate, 40-55 µm long and 5-8 µm wide, with basal clamps, 4-spored.

Spores ellipsoidal, smooth, hyaline, thin-walled, with an eccentric apiculus at one end, containing one or more internal lipid guttules, inamyloid in Melzer's reagent.