Synonyms: Agaricus coryphaeus; Agaricus leucoxanthus sejunctus; Agaricus leucoxanthus var. sejunctus; Agaricus sejunctus; Gyrophila coryphaea; Gyrophila equestris var. coryphaea; Gyrophila sejuncta; Gyrophila sejuncta sejuncta; Melanoleuca sejuncta; Tricholoma coryphaeum; Tricholoma fucatum var. lutescens; Tricholoma sejunctum f. albidum (homotypic); Tricholoma sejunctum f. pallidum; Tricholoma sejunctum var. coniferarum; Tricholoma sejunctum var. coryphaeum; Tricholoma sejunctum var. fagetorum; Tricholoma sejunctum var. friesii; Tricholoma sejunctum var. leucoxantha (homotypic); Tricholoma sejunctum var. rubroscabrum; Tricholoma sejunctum var. squamuliferum (homotypic); Tricholoma sejunctum var. subdulce