Gymnopus update

[cybershot]

Although Mycokey seems to have adopted this genus

MycoKey species display

Kew is still hedging it's bets:

"GYMNOPUS (Pers.) Roussel [non Gymnopus Quél. (1887)], Flora Calvados, Edn 2: 62 (1806)
Agaricales, Tricholomataceae
Type: Gymnopus fusipes (Bull.) Gray
As noted by Henrici (FM7(1): 4, 2006), the checklist has not yet adopted Gymnopus (regarded pro tem. as a synonym of Collybia) because of uncertainty over the application of the generic name. The most recent molecular study (Wilson & Desjardin, Mycologia 97(3): 667 – 679, 2005) suggests that only the type species, G. fusipes, and allied taxa (including e.g. Micromphale perforans, Collybia dryophila, and Marasmius androsaceus) should be referred to Gymnopus, whilst other species in the complex should be referred to Collybia sensu stricto, Marasmiellus sensu stricto, Rhodocollybia, Mycetinis Earle, and a number of unnamed or provisional clades. There seems no point in temporarily adopting these partial generic redispositions (which offer no updated names for species such as Collybia confluens and C. peronata). However, it is the intention to recognize Gymnopus et al. and update the checklist as soon as a fuller treatment is published."

Ref: Checklist of the British & Irish Basidiomycota