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Hygrophoropsis rufa (D.A. Reid) Knudsen

Phylum: Basidiomycota - Class: Agaricomycetes - Order: Boletales - Family: Hygrophoropsidaceae

Hygrophoropsis rufa

Hygrophoropsis rufa, a gilled boletoid fungus, was until recently considered merely a variety of the False Chanterelle Hygrophoropsis aurantiaca; however, recent DNA studies have shown that is a distinct species.

Hygrophoropsis rufa, New Forest, Hampshire UK

Distribution

Although infrequently recorded in Britain and Ireland, this species may be more common than records suggest since it is easily confused with Hygrophoropsis aurantiaca.

Taxonomic history

When in 1972 British mycologist Derek Agutter Reid (1927 - 2006) described this mushroom he gave it the scientific name Hygrophoropsis aurantiaca var. rufa. Its currently-accepted scientific name Hygrophoropsis rufa dates from a 2008 publication (see Reference Sources, below) by Danish mycologist Henning Knudsen.

Hygrophoropsis is a sparsely populated genus, with just five species currently recorded from Britain.

Etymology

The genus name Hygrophoropsis means resembling Hygrophorus. (The suffix -opsis comes from Greek and means 'similar to'.) In shape it is true that woodwaxes (Hygrophorus species) and Hygrophoropsis rufa are somewhat similar, but woodwaxes have broad gills which are, as the name suggests, waxy. If you are unfamiliar with woodwaxes, Hygrophoropsis hypothejus, commonly called the Herald of Winter, is a typical example. The specific epithet rufa is a reference to the orange-brown colouring of the cap of Hygrophoropsis rufa.

Identification guide

Cap of Hygrophoropsis rufa

Cap

Cap diameter 3-10cm. Initially convex, caps usually expand to become shallow funnels but occasional specimens remain slightly domed or simply flat when fully mature; surface dry, matt to finely or granularly tomentose. Cap colour orange-brown to dark brown. The cap margin remains slightly inrolled and is often wavy and irregular.

Gills of Hygrophoropsis rufa

Gills

Bright orange when young and fresh, becoming yellower when old, the repeatedly-forking gill-like spore-producing structures are deeply decurrent and narrow.

Stem of Hygrophoropsis rufa

Stem

Typically 3 to 5cm tall and 5 to 10mm in diameter, upper parts of the tough stems of Hygrophoropsis rufa are the same colour as the cap, while the stem base is white tomentose. The fibrous flesh is orange buff.

 

Spores

Ellipsoidal to ovoid, smooth, thick-walled, 5.6-6.4 x 3.6-4.4μm; dextrinoid.

Spore print

White.

Odour/taste

Mildly mushroomy but not distinctive.

Habitat & Ecological role

Saprobic, most often found beside conifer stumps and on conifer woodchip and occasionally sawdust.

Season

August to November in Britain and Ireland.

Similar species

Hygrophoropsis aurantiaca has a paler yellow-orange cap and significantly larger thin-walled spores.

Cantharellus cibarius, a popular edible species found in similar woodland habitats, has wrinkled veins rather than gills.

Culinary Notes

Hygrophoropsis rufa is a rarely recorded species whose edibility is unknown to us.

Hygrophoropsis rufa, southern England

Reference Sources

Fascinated by Fungi, Pat O'Reilly 2016.

Hygrophoropsis rufa (D.A. Reid) Knudsen, in Knudsen & Vesterholt, Funga Nordica, Agaricoid, Boletoid and Cyphelloid Genera (Gylling): 913 (2008)

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 Simon Harding.

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