On bark, &c. Waitaki (260).

ARALIACEAE. Neopanax arboreum: Wellington, Totara Reserve, Pohangina Valley, 80 m. Schefflera digitata: Auckland, Whitianga Road, Coromandel Peninsula, 400 m. Westland, The Forks, Okarito. BERBERIDACEAE. Berberis vulgaris: Auckland, Te Puke, -15 m. COMPOSITAE. Senecio kirkii: Auckland, Orere, Hunua Ranges, 350 m. CORIARIACEAE. Coriaria sarmentosa: Westland, Rolo Creek, Okarito. ELAEOCARPACEAE. Elaeocarpus dentatus: Auckland, Blue Lake, Rotorua, 500 m. FAGACEAE. Nothofagus fusca: Nelson, Murchison, 140 m. LILIACEAE. Phormium tenax: Westland, Okarito Lagoon. Rhipogonum scandens: Auckland, Whitianga Road, Coromandel Peninsula, 300 m; Lake Okataina, 500 m. LOGANIACEAE. Geniostoma ligustrifolium: Auckland, Mt. Te Aroha, 350 m; Waiomu Valley, Thames, 35 m. MALVACEAE. Hoheria populnea: Auckland, Atkinson Park, Titirangi, 250 m. MONIMIACEAE. Hedycarya arborea: Auckland, Blue Lake, Rotorua, 500 m. MYRTACEAE. Metrosideros excelsa: Auckland, Whites Stream, Piha. PIPERACEAE. Macropiper excelsum: Auckland, North-east King Island; Claudelands Reserve, Hamilton, 35 m. Wellington, Totara Reserve, Pohangina Valley, 70 m. POLYGONACEAE. Muehlenbeckia australis: Wellington, Ballance Reserve, 35 m. Nelson, Maitai Valley, 15 m. Westland, The Forks, Okarito. ROSACEAE. Rubus australis: Auckland, Lake Rotoehu, 450 m. RUBIACEAE. Coprosma australis: Auckland, Mamaku Forest, 600 m. RUTACEAE. Phebalium nudum: Auckland, Waipoua Kauri Forest, 200 m. SOLANACEAE. Cyphomandra betacea: Auckland, Te Puke, 15 m. VIOLACEAE. Melicytus ramiiforus: Auckland, Huia, 35 m; Purewa Bush, 30 m; Kauaeranga Valley, Thames, 30 m; Mt. Te Aroha, 500 m; Lake Okataina, 500 m. Wellington, Carters Reserve, Carterton, 50 m; Totara Reserve, Pohangina Valley, 30 m. UNKNOWN HOST. New South Wales, Cronulla.

Hymenophore annual, sometimes biennial, membranous, adherent, effused forming irregular often linear areas 5-15 x 2-6 cm; hymenial surface white, drying cream, even or slightly tuberculate, often farinose, finally deeply creviced; margin thinning out; sometimes indefinite, white, fibrillose or arachnoid, adherent. Context white, 80-150 µm thick, basal layer scanty, of parallel hyphae, intermediate layer of loosely arranged mainly erect scantily branched hyphae, becoming more dense beneath the hymenium and scantily encrusted; generative hyphae 3-4 µm diameter, walls 0-2 µm thick, hyaline, with clamp connections. Metuloids arising from the hymenium and subhymenium, some projecting to 30 µm, sometimes a few scattered in the intermediate layer, cylindrical, 30-50 x 5-8 µm, apices rounded or as often slightly capitate, finely or coarsely encrusted, or with the apical region naked. Hymenial layer to 40 µm deep, a loose palisade of basidia, paraphyses, metuloids, and occasional paraphysate hyphae. Basidia subclavate, 16-22 x 4-5 µm, bearing 4 spores; sterigmata slender, to 5 µm long. Paraphyses subclavate, 8-16 x 3-4 µm. Paraphysate hyphae scanty, cylindrical, projecting to 15 µm. Spores broadly elliptical, many subglobose, 5-6 x 3.5-4 µm, walls smooth, hyaline, 0.2 µm thick.

DISTRIBUTION: Europe, Great Britain, North America, Australia, New Zealand.

HABITAT: Effused on bark or decorticated wood of dead branches.

Specific features are the abundant, broadly elliptical, small spores, narrow metuloids often capitate and bearing fine crystals, loosely arranged encrusted context hyphae and white or cream, fragile hymenophore. In collections from this region metuloids are distinctly encrusted, whereas in European specimens examined in Kew herbarium, some bore only a few crystals, and many were naked. Because of this the species has sometimes been treated as a Corticium, and metuloids described as 'cystidioles'.

TYPE LOCALITY: Europe.