MATERIAL: New Zealand; North l.; N. Auckland; Loge's Bush, Warkworth, M. Laird, 3 vi 1986, PDD 56752 (holotypus); Northland: Trounson Kauri Park, Donnelly's Crossing, B. Segedin. 8 ii 1986, PDD 56753, (icon).

Pileus 2-3 mm, narrowly parabolic to campanulate, slightly depressed at the top with often a tiny, pointed umbo, pinkish buff, darkening to reddish-brown, brick colour in the centre, smooth, dry, sulcate almost to the top, flared margin crenate, matching the grooves, and slightly darker in colour. Lamellae broadly adnate, 1 series, 12 in number, buff coloured, margin even. Stipe 20 X 1 mm, buff at the lop but brick-coloured for most of length, even, smooth, fistulose, cartilaginous, insititious, no basal hairs. Flesh cream, thin except at the flattened top of the pileus. Odour and taste unknown. Colour of spore print unknown. Spores 7-9 X 4.5-5.5 (7.0 X 5.25) µm., Q=l.5, ellipsoid, hyaline, l strongly amyloid, smooth, thin-walled. Basidia 15-20 X 6-7 µm., 2- and 4-spored. Cheilocystidia 15-20 X 6-9 µm., clavate, with short, simple, diverticulate outgrowths, not very frequent, mixed with basidia and scarcely projecting beyond them. Pleurocystidia none. Trama of more or less parallel, narrow (5 µm.) and broad (20 µm.) hyphae, hyaline to faintly yellow; a few conducting hyphae with refringent yellow contents. Pileipellis of repent hyphae 4 µm. diam., giving rise to simple, repent, hearth-brush-like cystidia (4-8 µm. diam.) with short (4 µm.), mostly simple, sometimes diverticulate outgrowths, or cystidia may be erect, sphaero-pedunculate to clavate, with simple or shortly diverticulate outgrowths, or compoundly sphaero-pedunculate. Subpellis of repent narrow (l-2µm.), somewhat gelatinised hyphae. Context of fairly uniform, broad hyphae, family yellow (KOH) and faintly encrusted, dextrinoid in Melzer's. Caulocystidia none. Clamp connections present.

HABITAT: Among matted aerial roots at the base of trunks of black tree fern, Cyathea medullaris Swartz (Maori name, mamaku).

Pileus 2-3 mm, anguste parabolicus vel campanulatus, leviter depressus, saepe umbone minuto, roseobubalinus vel testaceus in centro, sulcatus, margine crenato. Lamellae adnatae, 1 series, bubalinae. Stipes 20 X 1 mm, testaceus, insititius. Sporae 7-9 X 4.5-5.5 µm., ellipsoideae, hyalineae, valde amyloideae. Basidia bi- et tetraspora. Cheilocystidia 15-20 X 6-9 µm., clavata diverticulis brevibus ad apicem, pauca, mixta cum basidiis. Pleurocystidia nulla. Pileipellis ex hyphis repentibus, diverticulis aut protuberationibus cum diverticulis. Subpellis ex hyphis gelatinosis. Contextus dextrinoideus. Fibulae adsunt. Caulocystidia nulla. Inter radices aerios filicis dendroidei (Cyathea medullaris (Forst. f.) Swartz, mamaku).

HOLOTYPUS: PDD 56752.