LAURACEAE: Beilschmiedia tawa: Auckland, Lake Rotoehu, 400 m, type collection, P.D.D. herbarium No. 17441; Lake Rotoiti, 450 m.

Hymenophore annual or biennial, ceraceous, adherent, either in the form of scattered, pulvinate, small, adherent, orbicular colonies 2-5 mm diameter, or coalesced when linear and to 20 x 3 mm; hymenial surface white, rugulose, even, tardily creviced; margin cliff like, white, black when old, adherent. Context white, 150-500 µ thick, basal layer delicate, of intertwined hyphae, intermediate layer of erect delicate hyphae cemented into a pseudoparenchyma, embedding masses of crystals; generative hyphae 0.5-2 µ diameter, walls 0.1 µ thick, with clamp connections. Dendrophyses somewhat scanty, arising in the base of the intermediate layer, projecting slightly, composed of delicate stems bearing apical branches, naked. Gloeocystidia crowded in the hymenium and context, not projecting, clavate or more often fusiform, in the hymenial layer often with an acuminate or slightly expanded apiculus, 25-40 x 9-12 µ, in the context more often subglobose, fusiform, or pyriform, 8-12 µ diameter. Hymenial layer to 50 µ deep, a compact palisade of basidia, paraphyses, dendrophyses, and gloeocystidia. Basidia cylindrical or slightly inflated at bases, 30-42 x 7-9 µ, bearing 4 spores; sterigmata erect, stout, to 9 µ long. Paraphyses subclavate, 30-40 x 6-7.5 µ. Spores globose or subglobose, 7-9 µ diameter, walls smooth, hyaline, 0.5 µ thick, nonamyloid.

TYPE LOCALITY: Lake Rotoehu, Auckland, New Zealand.
DISTRIBUTION: New Zealand.

HABITAT: Scattered on bark of living trunks.

Hymenophorum ceraceum, adnatum, ex multis, sparsis, pulvinatis colonies, 2-5 mm diam.; superficie alba, rugulosa, aequa, tarde rimosa. Hyphae generatoriae fibulatae, 0.5-2 µ diam. Dendrophyses rari, nudi. Gloeocystidia clavata vel fusiformia, 25-40 x 9-12 µ. Basidia cylindricalia, 40-52 x 7-9 µ, 4 sporis. Sporae globosae vel subglobosae, 8-9 µ, parietibus levibus, hyalinis, nonamyloidibus. On living bark of Beilschmiedia tawa, Lake Rotoehu, Auckland, N.Z.

From others possessing naked dendrophyses the species may be separated by the smooth globose spores and fusiform or clavate gloeocystidia crowded in the context and hymenial layer. The species resembles A. nivosum in certain macrofeatures, differing in that spores are smaller, dendrophyses naked, and the small gloeocystidia are crowded in the context and hymenium.