ARAUCARIACEAE. Agathis australis: Auckland, Waipoua Kauri Forest, 250 m. PODOCARPACEAE. Dacrydium cupressinum: Otago, Ulva Islet, Stewart Island. Podocarpus totara: Auckland, Waipoua Kauri Forest, 180 m. UNKNOWN HOSTS. Auckland, Clevedon. Wellington, Wiltons Bush, 160 m; Karori, 130 m.

Hymenophore annual, membranous, loosely attached, forming irregular areas to 8 cm across. Hymenial surface even, white drying isabelline or pallid fulvous, soft, flaccid, not creviced; margin loosely attached, lifting, rhizomorphic, often in the form of broad sterile yellow sheets, 1-10 mm wide. Pores round, sometimes obscurely stratose, 3-6 per mm, to 0.75 mm deep, 100-150 µm diameter; dissepiments not toothed, 50-100 µm thick, equal. Context white or cream, drying isabelline, to 0.3 mm thick, of loosely intertwined hyphae, embedding crystals; generative hyphae 2.5-3 µmdiameter, walls 0.25 µm thick, hyaline, slightly tinted when old, branched, septate, encrusted partly with mucilage granules or calcium crystals, with clamp connections. Hymenial layer to 25 µm deep, a close palisade of basidia and paraphyses. Basidia subclavate, 8-12 x 3.5-5 µm, soon collapsing, bearing 4 spores; sterigmata slightly arcuate, to 6 µm long. Paraphyses clavate, 6-10 x 3-3.5 µm. Spores globose or subglobose, 3-4 µm diameter, walls smooth, hyaline, 0.1 µm thick.

DISTRIBUTION: Europe, North America, New Zealand.

HABITAT: Fallen decayed trunks, branches and worked timber, mainly of conifers, associated with a brown rot.

Features aiding diagnosis are the monomitic hyphal system with clamp connections on the generative hyphae, subglobose small spores, prominent coloured rhizomorphs, and yellowish colour of the hymenophore. New Zealand collections have been taken from much decayed coniferous wood, associated with a brown rot. Context hyphae may be naked, or partly encrusted with granules of coloured mucilage and/or calcium crystals, sometimes the latter almost completely encrusting them.
In a previous paper (Cunningham 1947b, p. 13) I referred the species to Poria adiposa (Berk. & Br.) G. H. Cunn.; but later examination of collections of this species in Kew herbarium showed our plants to differ in several particulars. Collections from the region resemble most closely Poria albolutescens, including the characteristic yellow rhizomorphs. They also resemble Poria myceliosa Peck as plants are white when fresh, pallid yellow or dingy white when dry. The latter has larger pores (3-4 per mm) and elliptical spores 4 x 2.5 µm.

TYPE LOCALITY: Lapland.