ARALIACEAE. Neopanax colensoi: Taranaki, Mt. Egmont, 700 m: CORNACEAE. Griselinia littoralis: Otago, Mt. Cargill, 300 m. FILICALES. Cyathea medullaris: Auckland, Huia, 35 m; Te Kouma, Coromandel Peninsula, 200 m. MYRSINACEAE. Myrsine australis: Auckland, Purewa Bush, 30 m. ROSACEAE. Rubus cissoides: Otago, Morrisons Creek, Dunedin, 200 m.

Hymenophore annual, arachnoid or pelliculose, adherent, effused forming linear areas to 20 x 4 cm; hymenial surface white, delicately pruinose, not creviced; margin arachnoid, white, adherent. Context white, 10-60 µm thick, basal layer of parallel compact hyphae, intermediate layer wanting; generative hyphae 1.75-2 µm diameter, walls 0.2 µm thick; naked, with clamp connections. Hymenial layer 15-20 µm deep, a scanty palisade of basidia and paraphyses. Basidia subclavate, 10-12 x 3-4 µm, bearing 4 spores; sterigmata delicate, to 4 µm long. Paraphyses obpyriform, ovate, or cylindrical, 5-8 x 3-3.5 µm. Spores allantoid, 3-4 x 1-1.5 µm, walls smooth, hyaline, 0.1 µm thick.

DISTRIBUTION: North America, New Zealand.

HABITAT: Effused on bark of dead branches and dead stipes of tree ferns.

In C. vescum the hymenophore develops as a tenuous white, sometimes pelliculose film attached firmly to the substratum, following closely its irregularities and resembling a light grey wash of water colour. The context is usually scanty, consisting of a few mainly parallel hyphae which soon collapse and become partly gelatinised; in some collections it may attain the thickness of 50 µm. An intermediate layer is wanting, the hymenium arising from short branches of the basal layer. Obpyriform or ovate paraphyses are common and form the bulk of the hymenial layer. In the collection from Rubus cissoides most paraphyses are obpyriform or ovate, whereas in those from Neopanax colensoi and Myrsine australis they are ovate, pyriform, cylindrical or subglobose.

TYPE LOCALITY: Alabama, U.S.A.