Yellow Swamp Brittlegill

Yellow Swamp Brittlegill Russula claroflava Grove (illustrated 60% life size) Cap 4–10cm across, convex, later with a depression, margin finally furrowed; yellow to ochre-yellow; fairly fleshy, slightly sticky, shining, less so when dry; half peeling. Stem 40–100×10–20mm; white; soft but not fragile. Flesh white; taste mild or slightly hot. Gills adnexed to almost free; palish ochre, all parts becoming dark grey on bruising or when old. Spores 9–10×7.5–8µ, ovate; warts up to 1µ high, joined by numerous fine lines to form a fairly well-developed network. Spore print pale ochre (F). Cap surface without cystidia; numerous hyphae with encrustations staining in fuchsin present. Habitat with birch, especially where wet; autumn, sometimes late spring to early summer. Frequent. Edible good.