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Nomenclature
Russula claroflava Grove
Midland Naturalist 11: 265-266. 1888.
≡ Russula ochroleuca var. claroflava (Grove) Cooke
Ill. Brit. fung.: pl. 1198. 1889.
Original diagnosis
Russula claroflava sp. nov. — This species resembles Russula ochroleuca, and might by some be considered only a stronggly-marked variety of that, but it differs in other points than colour so remarkably that it is, in my opinion, fairly entitled to be considered distinct. It has occurred for many years successively at Wyndley Pool, Sutton, and always presents the same appearance. In stature it approaches R. citrina, but resembles R. ochroleuca in the ultimately rugose and cinereous stem, which is at first white and smooth, but ultimately becomes even more darkly cinereous than in that species. The colour of the pileus is a pure rich chrome-yellow, even approaching the paler shades of egg-yellow, and the same tint is found occasionally on the base of the stem. The gills differ from both the species mentioned in becoming a pale lemon-yellow. The flesh, wherever wounded, becomes somewhat rufous. R. claroflava: pileus, 2-3 inch, convex, at first bullate, then plane, slightly depressed in the centre, chrome-yellow; margin turned down, at length patent, perfectly even or slightly striate when old, often paler than the disc, but sometimes of a deeper colour; cuticle not so easily separable as in ochroleuca; flesh white, yellow beneath the cuticle; stem 1½-2½ in. × ½-¾ in., smooth, white, cylindrical, blunt at base, slightly spongy within, at length rugose and cinereous or even blackish; gills scarcely crowded, not reaching the stem so much as in ochroleuca, not united behind, white, then altogether pale-lemon yellow, at length sub-ochraceous. Amongst grass in damp places, Wyndley Pool, Sutton Coldfield. September-October.
W.B. Grove, B.A.
Typification
Holotypus: not designated.
Original material collected in: Europe: United Kingdom: Sutton Coldfield: Wyndley Pool
Neotypus: PC: Romagnesi 57-103, Europe: France:
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Description
Photographs
Microscopy
SEM photos
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