MYRTACEAE. Eucalyptus sp: New South Wales, Bullahdelah, type collection, also in Kew herbarium, No. 10, from the same locality.

Hymenophore annual, adherent, membranous, effused forming irregular areas to 9 x 4 cm. Hymenial surface (now) pallid pinkish buff, even, irregularly creviced when old; margin thinning out to 0-5 mm across, fibrillose, loosely attached. Pores 5-7 per mm, 60-130 µm diameter, round, to 0.8 mm deep; dissepiments 40-100 µm thick, equal, apices fibrillose with encrusted hyphae. Context to 300 µmthick, pallid wood colour, of densely intertwined hyphae; skeletal hyphae 3.5-5 µm diameter, walls 1-1.5 µm thick, aseptate, scantily branched; generative hyphae 2.5-3 µm diameter, walls 0.25-0.5 µm thick, branched, septate, associated with numerous pyriform vesicles 5-8 µm diameter, which sometimes appear in the hymenial layer as capitate paraphysate hyphae, with clamp connections. Hymenial layer to 25 µm deep, a close palisade of basidia, paraphyses, and capitate paraphysate hyphae. Basidia subclavate, 10-16 x 3.5-4.5 µm, bearing 2-4 spores; sterigmata erect, slender, to 5 µm long. Paraphyses cylindrical, fusiform, or subclavate, 8-15 x 3-3.5 µm. Capitate paraphysate hyphae projecting to 15 µm, 5 µm, diameter, some with apices crystal encrusted. Spores oval, many subglobose, 4-4.5 x 3-3.5 µm, or 4 x 3.5 µm, walls smooth, hyaline, 0.1 µm thick.

DISTRIBUTION: Australia.

HABITAT: Bark of fallen logs, associated with a white rot.

In the type collection plants are growing upon charred bark. The species is close to P. versipora in many particulars, especially in the structure of the context hyphae. It differs mainly in the presence of abundant pyriform vesicles among the context hyphae, and surface colour. Vesicles are also present in some collections of P. versipora but are scanty, smaller and usually confined to apices of the dissepiments.

TYPE LOCALITY: Bullahdelah, New South Wales.