HABITAT: Bark or decorticated fallen decayed branches, associated with a white rot. UNKNOWN HOSTS. New South Wales, Moruya (herb. Kew); Pennant Hills.

Hymenophore annual, adherent, membranous, effused forming small elliptical colonies 3 x 2 cm. Hymenial surface when fresh white, drying white or ivory, even, not creviced; margin thinning out, fibrillose, adherent, white. Pores 3-4 commonly 3 per mm, round or polygonal, 0.2-0.5 mm diameter; dissepiments 40-85 µm thick, tapering, fringed with crystal encrusted hyphae. Context white, 0.1-0.3 mm thick, of loosely intertwined hyphae; generative hyphae 3-4.5 µm diameter, to 6 µm in a few inflated cells, many in the dissepiments sheathed with plate like linear crystals almost forming tubes, walls 0.2 µm thick, branched, septate, with clamp connections. Hymenial layer to 15 µm, deep, a loose irregular palisade of basidia and paraphyses. Basidia subclavate, many obovate, 8-14 x 4-5.5 µm, bearing 2-4 spores; sterigmata erect, to 3 µm long. Paraphyses obovate or cylindrical, 8-12 x 2.5-4 µm. Spores globose or subglobose, 4-5.5 µm (including spines), walls finely sparsely echinulate, hyaline, 0.1 µm thick, spines to 0.5 µm long.

DISTRIBUTION: North America, Europe, Australia.

Specific features are the small subglobose or globose, echinulate spores, monomitic hyphal system with some hyphae inflated, others ensheathed with plate-like crystals, and delicate fimbriate dissepiments. Under Poria hymenocystis an Australian collection, now in Kew herbarium, ex "N.S.W., Moruya, W.N. Cheeseman, 1914" was recorded by E. M. Wakefield (1915, p. 365).

TYPE LOCALITY: Bethlehem, Pennsylvania.