Hymenophore to 8 x 4 cm., 6-10 min. thick, firm, horny, hard, wood-coloured when dry; margin tapering, irregular, to 2 mm wide, floccose, not lifting, cream coloured; surface even, compact, dissepiments not toothed. Pores wood-coloured in section, stratose, round or slightly angular, to 4 mm. deep, each layer separated by a black line 0.5 mm. thick, 50-150 µ diameter, or 7-9 to mm.; dissepiments 30-100 µ thick, apex tapering, appearing as a firm even layer, of cemented parallel hyphae, not velutinate. Context to 0.8 mm. thick, thinner when old, white or isabelline, hyphae parallel or slightly woven, passing unchanged into the dissepiments; skeletal hypha 3-4 µ thick, thick-walled, lumen often almost obliterated, hyaline, aseptate, sparsely branched near ends, irregular; generative hyphae to 2 µ thick, branched, septate, thin-walled, clamp connections present. Basidial type clavate, basidia clavate, to 10 x 4 µ, soon collapsing. Spores ovate, elliptical, or pip-shaped, 3.5-4 x 2-2.5 µ, smooth, hyaline.

New Zealand.

Metrosideros robusta A.Cunn., on decorticated fallen trunk lying on the forest floor.

Characters of the species are the firm, horny, wood-coloured hymenophore (when dry), stratose minute pores with layers differentiated by a black line, thin dissepiments, aseptate sparsely branched skeletal hyphae with almost obliterated lumen, clavate basidia and small ovate or elliptical spores. The specific name is taken from the Maori name applied to the host.

Wellington. Ngatamoti, Ruahine Ranges, 2,800 feet, Jan. 1933, J.G.Gibbs, type collection.