porcelain slimecap

Oudemansiella australis mushrooms have a cap that is 3–5.5 cm (1.2–2.2 in) in diameter, and initially white becoming a light yellowish brown (fawn) in age. It has a convex shape, but splits at the margins. The cap cuticle splits irregularly to reveal firm white flesh underneath. The gills are adnate, powdery white, and moderately distantly spaced. They are long and short intercalated, with deep with ribs at the base. The stem is 2.5 cm (1.0 in) long by 0.6–1 cm (0.2–0.4 in) thick, attached off-centre to the cap. It is white on the upper part, changing to fawn around the swollen base. The flesh is solid, white, and silky. The spore print is white. Spores are spherical or nearly so, measuring 24 by 21 μm, with thick walls (about 1 μm). They are non-amyloid, and have a prominent hilar appendix (a depression in the surface where the spore was once connected to the sterigmata).

The fungus grows on rotting wood. The first recorded collection was made in the open near a forest in Wainui Valley, Wellington. It has since been found in Australia and Papua New Guinea.

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