Pileus 1.2 to 6.2cm diameter, at first slightly convex with down turned edge, then sometimes expanded and upturned, often depressed over the attachment of the stem, wavy, irregular and more or less lobed at the margin, when found growing usually whitish to dingy whitish or pale buffy white (Cartridge Buff, XXX.) or creamy white and opaque, smooth, a little translucent when very moist, when gathered becoming Ochraceous Buff (XV.) round the edge and even browner in the centre, herbarium specimens drying a dingy biscuit colour. Gills adnate to sometimes slightly decurrent, close, narrow, whitish, then creamy-white. Stem short, 1.2 to 2.5cm, central to excentric or occasionally almost lateral from the position in which it may have grown, similarly often bent, slender or rather stout, equal or slightly attenuated downwards, pruinose, tough, hollow above, the colour of the pileus. Flesh thin, equally attenuated outwards. Spores nearly subspherical, 3.5 to 4 x 2.5 to 2.8 μm, 4 μm. Sometimes caespitose (growing in dense tufts or clusters). Attached by fluffy-white mycelium to the undersides of thick sheets of fallen or stripped bark and fallen wood on the ground beneath eucalypts, or around the base of stumps, the pilei often emerging with difficulty or only found after removing overlying litter.[3] Cleland used Ridgeway colour standard and nomenclature.[4]
Range
South-eastern Australia (NSW, Victoria, South Australia) south Western Australia and Tasmania.[3][5] New Zealand.[6]
Growing on decomposing wood.[3] In New Zealand recorded on dead and decaying tree fern fronds, and fibrous monocotyledon leaf and stem material.[6]
Etymology
From Latin, semi, half; occult us, hidden. The specific name alludes to the frequency with which the mushrooms are often more or less hidden under bark and debris.[3]
Taxonomy
For current taxonomic relationship of the genus see Ossicaulis. As Cliyocybe semiocculta the pale colouration of the pileus, the adnate to slightly decurrentgills, the presence of clamp connections and the absence of cystidia indicate it belongs in Subgenus Clitocybe, Section Disciformes.[7]
↑ Cleland, J.B. (1927). "Australian fungi: notes and descriptons - No. 6". Transactions and Proceedings of the Royal Society of South Australia. 51: 298–306.
1 2 3 4 5 Cleland, J.B. (1934). Toadstools and Mushrooms and Other Larger Fungi of South Australia. Part I and II 1934-1935 (Revised 1976ed.). Government Printer, South Australia.
↑ Grgurinovic, C.A. (1997). Larger Fungi of South Australia. Adelaide: The Botanic Gardens of Adelaide and State Herbarium, and The Flora and Fauna of South Australia Handbook Committee. ISBN0-7308-0737-1.
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