Calocybe gambosa

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***Calocybe gambosa***, commonly known as **St. George's mushroom**, is an edible mushroom that grows mainly in fields, grass verges and roadsides. Deriving its common name from when it first appears in the UK, namely on St George's Day (23 April). It appears in March in Italy, a warmer country where it is also a popular mushroom to eat, and is known there as *marzolino*. It is also popular in Northern Spain and Southern France, in the Basque Country region and its surroundings where it appears in April. In these regions it is usually eaten sautéed with egg or with bacon.

It is considered a delicacy, especially when fried in butter. It was previously considered a part of the large genus *Tricholoma* and is still seen as *T. gambosum* in older texts.

## Taxonomy

Initially described as *Agaricus gambosus* by Elias Magnus Fries in his 1821 work *Systema Mycologicum*, with its specific epithet derived from a Latin term for "club footed" in relation to its bulky stipe. It was later named *Tricholoma gambosum* by Paul Kummer in 1871, before being reclassified as *Calocybe gambosa* by Marinus Anton Donk in 1962. In Germany it is known as *Maipilz*, where it fruits in May. The genus name is derived from the Ancient Greek terms *kalos* "pretty", and *cubos* "head". In Denmark it is called *Vårmousseron*, appearing in spring - early May

## Description

The cap measures from 5–15 cm (2 to 6 inches) in diameter and has a smooth texture and has ridges on it. The colour of the cap, stipe and flesh can range from white-creamy coloured to bright yellow. The sinuate gills are white and crowded. The flesh is thick and soft and has a mealy or cucumber smell. The spore print is white to pinkish white. The stubby stipe is bulky at the base.

Care must be taken not to confuse it with the highly poisonous *Inocybe erubescens*, which grows in the same habitats. The latter has a more pungent fruity smell and bruises red. *Entoloma sinuatum*, also poisonous, has a rancid smell.

## Distribution and habitat

It is common in grasslands in Europe, often in areas rich in limestone. It is common on the Swedish islands Öland and Gotland, both situated in the Baltic sea. On the South Downs in southern England, it has formed huge fairy rings that appear to be several hundred years old. It is found from April in the United Kingdom, and earlier in warmer countries.

## Edibility

The mushroom is best picked in dry weather. It can be eaten dry, pickled or even raw. It is imported in commercial quantities into Western Europe from Romania. It was held in high esteem in medieval Italy, reported by Costanzo Felici in 1569 as the most expensive and highly regarded mushroom in Umbria
and Marches in central Italy, and held in high esteem in the Apennine mountain region—Liguria, Tuscany, and Emilia-Romagna)—by Giovanni Targioni Tozzetti in 1777. It is still locally eaten in Emilia-Romagna and Tuscany.

## References

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3. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Kummer1871`
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5. ↑ 5.0 5.1 Template:Cite book
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7. ↑ http://www.mycokey.org/result\_textsearch.shtml?action=refresh&14945
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9. ↑ Template:Cite journal

## External links

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