Under (1) N. fusca, Nelson: L. Daniels track, 13.V.1969, R. F. R. McN. (2) N. fusca and N. menziesii. Nelson: Karamea, Umere, 8.i.l969, R. F. R. McN; Maruia, 24.iv.l969, R. F. R. McN. (3) N. menziesii. Nelson: Karamea, Umere, 2.L1968, R. F. R. McN; 5.1.1968, R, F. R. McN. (holotype, PDD 30663); 2.i.l969 (2 coils), 29.xii.l969, R. F. R. McN. Otago: Catlins, Puketiro Reserve, 29.iii. l966, R. F. R. McN. (PDD 26933).

pileus: 2-5.5 cm diam., hemispherical to convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, finely subpruinose under lens, velar remnants absent, deep greyish magenta to greyish violet, or dark purple with vinaceous tints, sometimes dark grey to black and finely creviced giving a sooty appearance, occasionally with greenish yellow areas: margins entire, non-pectinate. Cuticle composed of thin-walled, or slightly thick-walled, smooth or finely roughened, hyaline or yellow tinted, septate, hair-like hyphae to 150 µm long, 3-5 µm diam., without coloured contents in KOH, terminal cells unspecialised, tapering apically, originating from inflated, short-celled hyphae, or occasionally from sphaerocysts: pilocystidia absent. lamellae: adnexed to adnate, crowded, thin, simple or occasionally forked near stipe, to 4 mm deep, white to pallid creamy white, not discoloured at maturity, lamellulae rare or absent. stipe: 1.5-4 cm long, ± equal or slightly expanded basally, 0.4-1 cm diam., dry, solid, finely furfuraceous under lens, pallid greyish magenta with rose tints, white flesh often showing through, occasionally almost entirely white with faint rose tints basally; flesh white, unchanging on exposure to air. Cuticle composed of interwoven, repent, thin-walled, septate hyphae 2.5-5 µm diam., terminal cells projecting and aggregated into clumps; caulocystidia absent. spores: spore print not obtained; spores broadly elliptical to ovate, obliquely apiculate, apiculus to 1.5-(2) µm long, 9.5-12 X 8.5-10.5 µm, ornamentation of dense, amyloid or partially inamyloid, truncated spines to 1.4-(1.8) µm high, typically joined basally by fine amyloid ridges and forming an incomplete reticulum, in small confluent groups, or occasionally isolated; plage conspicuous. hymenium: basidia hyaline, clavate, 30-48 X 10.5-15 µm, 4-spored, sterigmata to 8 µm long; pleurocystidia scattered, rare to numerous, broadly fusiform, hyaline, thin-walled, contents refractive in KOH, projecting to 15 µm beyond basidia, apices acuminate, strangulate, or capitulate, 45-78 X 7.5-11 µm; cheilocystidia sparse, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, intermixed. context of pileus: white, unchanging; structure heteromerous, clamp connections absent. taste: lamellae and context mild. chemical characters: formalin on context—n.r.; phenol on context—slowly deep vinaceous; FeSO4 on context—pallid salmon pink; guaiacol on stipe base—n.r.; KOH on pileus—magenta colour disappears leaving area orange-red; on context—n.r.; NH4OH on pileus and context—n.r.

Solitary or gregarious under Nothofagus.

Pileus centraliter depressus 2-5.5 cm diam., saturate griseo-magenteus ad nigrum, subtiliter subpruinosus; veli vestigia deficiunt: margines integri, non pectinati. Lamellae adnexae ad adnatas, ad 4 mm altae, saturate pallide cremeae: lamellulae rarae. Stipes 1.5-4 cm longus, plus minusve aequalis, 0.4-1 cm diam., pallidior quam pileus. Sporae late ellipticae ad ovatas 9.5-12 X 8.5-10.5 µm, amyloides vel partim amyloides dense ornatae.

holotype, PDD 30663