According to Lodge & al. (2013) H. colemanniana belongs to the genus Cuphophyllus and the correct name for this taxon is Cuphophyllus colemannianus (A. Bloxam) Ricken.
It is widespread species in Europe, present in most countries. In Asian part of the Russia it is distributed in the Primorsky Krai of the Far East region (Kovalenko 1989).
Cuphophyllus colemannianus occurs in seminatural, nutrient poor and extensively managed grasslands (called Waxcap or CHEGD grasslands), rarely in fixed dunes or forest habitats. It prefers calcareous or basic soil. These grasslands are characterized by extensive grazing (cattle, horses, sheep, deer) or regular mowing and lack of recent fertilizer and pesticide application. In the last few decades, extensively managed grasslands are rapidly declining in Europe due to abandonment of traditional land use, intensification of farming practices, eutrophication and increased use of fertilizers and/or pesticides.
For a long time members of the genus Hygrocybe s. l. were considered as saprotrophs. However, Halbwachs et al. (2018) analysed stable isotopes in fruitbodies of different Hygrocybe species and suggested that these fungi are biotrophic endophytes or possibly mycorrhizal.
Cuphophyllus colemannianus is threatened by habitat loss
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