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Fragile Russula (Russula fragilis)

Fragile Russula

Toxic

Russula fragilis

Also known as: Russula fragilis

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Description

A small, delicate, and highly variable agaric mushroom. It is characterized by its fragile texture, often peeling cap cuticle, and an intensely acrid, peppery taste which renders it inedible.

How to Identify

Cap
2-6 cm diameter, convex to flat or depressed, purple to reddish or sometimes greenish, with a cuticle that peels easily.
Gills
White, adnate or slightly decurrent, thin, and closely spaced.
Stem
White, 2-5 cm long, often becoming fragile or hollow with age.
Flesh
White, thin, brittle, with a very acrid taste.
Fruiting body
Small, fragile, often with a sticky, shiny cap that fades in color.
Habitat
Mycorrhizal with deciduous and coniferous trees, commonly found in mossy woodland areas.

Key Facts

  • Cap surfaces: Viscid when moist, shiny, smooth.
  • Growth Form: Solitary or in small, scattered groups.
  • Spore Print: White to pale cream.
  • Body color: Highly variable; purple, reddish, or greenish tints.
  • Odor: Faintly fruity or cedar-like.
  • Flesh bruises: Does not bruise significantly.
  • Height: 2-6 cm.
  • Cap Diameter: 2-6 cm.
  • Nutrient gathering: Ectomycorrhizal.

Toxic

Moderate Toxicity

The mushroom is considered inedible and mildly toxic due to its intense acridity and digestive irritants.

Toxin Type: Sesquiterpenes (typical of Russulaceae)Reaction Type: Gastrointestinal distress

Quick Check

  • Odor: Faint, sometimes fruity or reminiscent of cedar.
  • Fruiting: Summer through autumn.
  • Substrate: Mycorrhizal; usually associated with leaf litter or mossy soil under trees.

Where to Find

Temperate Europe

Widely distributed in deciduous and coniferous forests across European countries.

North America

Recorded in various regions, though taxonomic scrutiny suggests several look-alikes may be present.

Finding Tips

Look for the cuticle

The cap skin of Russula fragilis is particularly easy to peel off, often to halfway or more towards the center.

Taste test (with caution)

A tiny, minuscule piece of raw flesh touched to the tip of the tongue will reveal an immediate, sharp, peppery, or acrid sensation characteristic of the species.

Similar Species

Sickener

Russula emetica

Also known as: Russula emetica

Purple Brittlegill

Russula atropurpurea

Also known as: Russula atropurpurea

Scientific Classification

Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Russulaceae
Genus
Russula

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