'Holotype (K): 'Keith George Park, Wellington, N.Z.; leg. Stevenson 852, 25.V.1952'. - Herb. HK. ZT 68/268: 'Thompson River, Waimakariri, Prov. Canterbury, N.Z.; leg. Baker, 26.III.1968'. -Herb HK. ZT 68/647 (PDD 27055): 'Kauaeranga Valley, Coromandel Peninsula, N.Z.; leg. Horak, 8.VIII.1968'.

Pileus 10-30(-45) mm, hemispherical when young becoming plane-convex to umbilicate, striate margin finally waved, dark brown to fuliginous, fading to beige, covered by concolorous squamules or fibrils, dry, hygrophanous. Lamellae (L 8-12, l 7), emarginate, grey becoming pink, with fimbriate, blue gill edge. Stipe 15-50 x 2-3 mm, cylindrical or subclavate, central, concolorous with pileus, with white mycelium at the base, blue tints absent, glabrous, dry, fistulose. Context brownish. Odor and taste not distinctive.
Spores 11-13 x 7-9 µm, 5-6-angled. Basidia 30-50 x 10 µm, 4-spored. Cheilocystidia in dense clusters at the gill edge, 30-100 x 14-25 µm, clavate, membrane thinwalled, with brown-blue plasmatic pigment. Pleuro- and caulocystidia none. Cuticle a cutis of repent or suberect, cylindrical hyphae terminal cells clavate (10-28 µm diam.), with brown plasmatic pigment, membrane not gelatinized. Clamp connections absent or present.

On soil (under Beilschmiedia tawa, Nothofagus spp.) or rotten debris of ferns (Cyathea dealbata). New Zealand.

Stevenson 1962: l.c.

The above description is based on the data found on the well preserved type material supplemented by observations made on two additional collections. Typical for the species are the blue gill edge, the large spores and the large cheilocystidia.

[Notes from Kew Type specimen, PRJ 2010] Kew images.