Russula mairei Singer
|gills on hymenium|
|cap is convex|
|hymenium is free|
|stipe is bare|
|spore print is white|
|ecology is mycorrhizal|
Formerly Russula mairei (Singer), and commonly known as the beechwood sickener, the now re-classified fungus Russula nobilis (Velen.) is a basidiomycete mushroom of the genus Russula. This group of mushrooms are noted for their brittle gills and bright colours.
The cap is a red or rosy colour, 3–6 cm wide, convex to flat, or slightly depressed, and weakly sticky. It peels only to a third of its radius, which reveals pink flesh. It is often damaged by slugs. The stem is 2–5 cm long, 1–1.5 cm wide, cylindrical, (firmer than its conifer dwelling namesake, Russula emetica), and white. The gills are narrowly spaced, adnexed, rounded, and white, often with a faint blue-green sheen. The spore print is white.
Distribution and habitat
Russula nobilis is inedible, and probably poisonous in quantity, but not deadly. Many bitter tasting red-capped species can cause problems if eaten raw; the symptoms are mainly gastrointestinal in nature: diarrhoea, vomiting and colicky abdominal cramps. The active agent has not been identified but thought to be caused by chemical compounds known as sesquiterpenes, which have been isolated from the related genus Lactarius and from Russula sardonia.
- Roger Phillips. (2006). Mushrooms. Pan MacMillan. p. 19. ISBN 0-330-44237-6.
- Thomas Laessoe. (1998). Mushrooms (flexi bound). Dorling Kindersley. ISBN 0-7513-1070-0.
- Benjamin, Denis R. (1995). Mushrooms: poisons and panaceas — a handbook for naturalists, mycologists and physicians. New York: WH Freeman and Company. p. 369. ISBN 0-7167-2600-9.
- "Danske storsvampe. Basidiesvampe" [a key to Danish basidiomycetes] J.H. Petersen and J. Vesterholt eds. Gyldendal. Viborg, Denmark, 1990. ISBN 87-01-09932-9
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