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Mycena nargan
''Mycena nargan'', commonly known as the Nargan's bonnet, is a species of fungus in the Mycenaceae family, and the sole member of the section ''Nargan'' in the genus ''Mycena''. Reported as a new species in 1995, it is known predominantly from Southern Australia. The saprobic fungus produces mushrooms that grow on well-decayed wood, often on the underside of wood lying in litter. The dark chestnut-coloured caps are covered with white, easily removed scales, and reach diameters of up to wide. The pale, slender stems are up to long and have white scales at the base. On the underside of the cap, the cream-coloured gills are widely spaced and bluntly attached to the stem. The edibility of the mushroom is unknown.
==Taxonomy, naming, and classification==
The species was first discovered in 1992 in Kuitpo Forest, South Australia, and reported as new to science in a 1995 ''Australian Systematic Botany'' publication.〔 The species name refers to the nargan or nargun, a mythical aboriginal being – originally the mycologists Tom May and Bruce Fuhrer had called it "nargan", as its white speckles glistened in the dark like the eyes of the nargan, and Cheryl Grgurinovic incorporated this into its specific epithet.〔 It is commonly known as "Nargan's bonnet", but has also been referred to as the "spotted pixie cap".〔
With respect to infrageneric classification (i.e., taxonomic ranking below the level of genus) in ''Mycena'', several characteristics suggest the mushroom fits best in Rudolph Arnold Maas Geesteranus' section ''Fragilipedes'': the ellipsoidal, amyloid spores; dextrinoid spore-bearing tissue; smooth cheilocystidia; gills with the edge the same colour as the face; and the non-slimy, distinctly coloured cap.〔 According to the 1986 infrageneric classification proposed by Rolf Singer,〔 the mushroom would be classified in subgenus ''Mycena'', subsection ''Ciliatae'', stirps ''Alcalina'' (roughly equivalent to section ''Fragilipedes'' of Maas Geesteranus) because of the amyloid spores, smooth, elongated cheilocystidia, dull-coloured pigment, and stem without either latex or a slimy sheath. Grgurinovic erected the new section ''Nargan'' to accommodate ''M. nargan'', because its scales, lack of coarse fibrils at the base of the stem, and lack of pruinose coating meant it was not a good fit for section ''Fragilipedes''.〔
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