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Mycena crocata (Schrad.) P. Kumm. - Saffrondrop Bonnet

Phylum: Basidiomycota - Class: Agaricomycetes - Order: Agaricales - Family: Mycenaceae

Mycena crocata, Saffrondrop Bonnet, France

There is a host of drab looking bonnet mushrooms, Mycena species, which, at best, are merely 'interesting' because they tend to occur in unusual habits, such as sprouting from twigs on standing trees, but a few of the bonnet mushrooms are beautiful as individuals, and the Saffrondrop Bonnet is certainly one of them.

Distribution

Mycena crocata, underside view

As you might expect from its English name, the Saffrondrop Bonnet is distinguished by random saffron-coloured splashes of colour on the surface of the caps and/or gills. This lovely little mushroom is an occasional find throughout Britain and Ireland, and it is widespread across northern and central mainland Europe, but in most countries it is far from common. Mycena crocata has also been recorded in North America.

Mycena crocata showing its long stem

Taxonomic history

The basionym of this species was defined when, in 1794, German mycologist Heinrich Adolf Schrader (1767 - 1836) described the Saffrondrop Bonnet and named it Agaricus crocea. It was another German mycologist, Paul Kummer, who transferred this species to its present genus Mycena in 1871, thereby establishing the currently accepted scientific name Mycena crocata..

Synonyms of Mycena crocata include Agaricus crocata Schrad.

Etymology

The specific epithet crocata means saffron yellow.

Identification guide

Cap of Mycena crocata

Cap

0.5 to 2.5cm across; conical, becoming bell shaped and often eventually papillate or narrowly umbonate; silky smooth; translucent-striate towards margin; reddish brown or orange brown at centre, paler yellow-grey or whitish towards the margin but stained randomly with orange or orange-red spots.

Gills and stem of Mycena crocata

Gills

Adnate with a decurrent tooth; whitish, stained randomly with orange or orange-red spots.

Stem

5 to 8cm long and 1 to 2mm in diameter; yellow to orange, becoming progressively redder towards the base; exudes a saffron-coloured latex or 'milk' when snapped and squeezed; no stem ring.

Spores of Mycena crocata

Spores

Elliopsoidal to sub-cylindrical, smooth, 5-10 x 5-7µm; amyloid.

Show larger image

Spore print

White.

Odour/taste

Odour faint, of bleach (ammonia) or of radish; taste not distinctive.

Habitat & Ecological role

Saprobic, in deciduous woodlands; particularly with beech trees (Fagus spp.).

Season

June to November in Britain and Ireland.

Similar species

There are many other smallish, bell-shaped fungi in the Mycena genus and they are difficult and sometimes impossible to identify without microscopic examination; however, the striking colouring of Mycena crocata at least helps separate it from most of the larger wood-rotting bonnet mushrooms.

Culinary Notes

Because they are insubstantial (although reputed not to be toxix) Saffrondrop Bonnets are not generally considered as having any culinary value.

Reference Sources

Fascinated by Fungi, Pat O'Reilly 2016.

Penny Cullington, (Oct. 2013). British Mycenas - Brief Descriptions.

Giovanni Robich, (2003). Mycena d'Europa; Associazione Micologica Bresadola ; Vicenza : Fondazione Centro Studi Micologici.

British Mycological Society. English Names for Fungi

Dictionary of the Fungi; Paul M. Kirk, Paul F. Cannon, David W. Minter and J. A. Stalpers; CABI, 2008

Taxonomic history and synonym information on these pages is drawn from many sources but in particular from the British Mycological Society's GB Checklist of Fungi and (for basidiomycetes) on Kew's Checklist of the British & Irish Basidiomycota.

Acknowledgements

This page includes pictures kindly contributed by David Kelly.

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