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Amanita franchetii (Boud.) Fayod

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

Amanita franchetii

The striking sulphur-yellow veil of Amanita franchetii is its most distinctive feature; however, the veil fragments lose a lot of their colour as the fruitbody matures.

Amanita franchetii, young fruitbody

Distribution

A rare to occasional find in Britain and Ireland, Amanita franchetii occurs also in many parts of mainland Europe. A similar species, Amanita augusta, occurs in western parts of the USA.

Taxonomic history

This species was first described scientifically in 1881 by the French mycologist Jean-Louis Émile Boudier, who named it Amanita aspera var. franchetii. The currently-accepted scientific name Amanita franchetii dates from an 1889 publication by Swiss mycologist Victor Fayod.

Synonyms of Amanita franchetii include Amanita aspera var. franchetii Boud., and Amanita queletii var. franchetii (Boud.) Bon.

Amanita franchetii, mature specimen

Above: a mature fruitbody. Note the brownish edge to the pendent ring.

Etymology

The specific epithet franchetii honours the French botanist Adrien René Franchet (1834 - 1900).

For a detailed description of the Amanita genus and identification of common species see our Simple Amanita Key...

Identification guide

Cap of Amanita franchetii

Cap

4 to 8cm wide, citrine yellow to yellow ochre, hemispherical then convex, finally planar and often slightly depressed in the center when old. Veil breaks up into small flat or pyramidal yellowish scales. Cap flesh is white with a thin pale yellow region just below the cap skin. Flesh does not redden when cut or bruised,

Gills and stem of Amanita franchetii

Gills

Free, white and moderately spaced.

Stem

The stem is 5 to 8cm long and 1 to 2cm in diameter, tapering from a bulbous base ringed with yellowish scales. Stem surface is white. A superior to median pendent membranous ring is grooved on its upper surface and has a yellow-brown woolly edge.

Spores, Amanita franchetii

Spores

Broadly ellipsoid, 8-11.5 x 6-8μm; amyloid.

Show larger image

Spore print

White.

Odour/taste

Not ditinctive.

Habitat & Ecological role

Mycorhizal with hardwood trees, particularly Oak, Sweet Chestnut and Pines.

Season

July to November in Britain and Ireland.

Similar species

Amanita pantherina has white (not yellowish) velar remains on the cap.

Amanita rubescens can look very similar but its flesh turns red when cut or bruised, especially near the stem base.

Culinary Notes

This is a rare species and should not be collected except for essential scientific study. The edibility of this species is at best dubious, as it has been implicated in poisonings. This species could easily be confused with the seriously toxic Amanita pantherina.

Reference Sources

Fascinated by Fungi, Pat O'Reilly, 2016.

Funga Nordica: 2nd edition 2012. Edited by Knudsen, H. & Vesterholt, J. ISBN 9788798396130

BMS List of English Names for Fungi

Geoffrey Kibby, (2012) Genus Amanita in Great Britain, self-published monograph.

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

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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