White Russula

Description

Russula delica is a robust, medium to large-sized mushroom characterized by its overall white to off-white coloration, deeply decurrent gills, and a lack of a milky latex (unlike Lactarius species). It is a mycorrhizal fungus, forming symbiotic relationships with various tree species, primarily hardwoods and conifers. Its common name, 'White Russula,' accurately reflects its dominant color. While generally considered edible after cooking, its taste can be somewhat acrid or peppery when raw, and it is often considered a mediocre edible due to its firm, somewhat brittle flesh and tendency to accumulate debris.

How to Identify

Cap

The cap is typically 5-15 cm (2-6 inches) in diameter, sometimes larger, initially convex, becoming broadly convex to flat, and eventually depressed in the center, often with a funnel-shaped depression in mature specimens. The margin is usually inrolled when young, expanding with age, and can be somewhat wavy. The surface is dry, unpolished, and often dull, sometimes with adhering soil or debris. It is typically white to cream, often staining yellowish-brown or rusty-brown with age or bruising.

Gills

The gills are deeply decurrent (running down the stem), crowded, thick, and brittle. They are initially white, becoming cream to pale yellow with age, and often develop rusty-brown spots or stains. They are not typically forking.

Stem

The stem is 3-8 cm (1.2-3.2 inches) long and 1.5-3 cm (0.6-1.2 inches) thick, stout, solid, and cylindrical or tapering slightly towards the base. It is white, often staining yellowish or brownish with age or handling, and lacks a ring or volva. The surface is dry and unpolished.

Flesh

The flesh is thick, firm, and brittle, white throughout, and does not change color when cut or bruised. It has a mild to slightly acrid or peppery taste when raw, and a faint, sometimes unpleasant, odor.

Fruiting body

The fruiting body is robust and fleshy, typically emerging from the soil partially buried, often covered in leaf litter or duff. It is entirely white to cream-colored when young, often developing yellowish or brownish stains with age or handling.

Habitat

Russula delica is a mycorrhizal species, forming symbiotic relationships with a wide range of deciduous and coniferous trees. It is commonly found growing solitarily or scattered on the ground in mixed forests, broadleaf woodlands (especially with oak and beech), and conifer forests (pine, spruce, fir). It prefers well-drained, often mossy or leaf-littered soil.

Key Facts

• Cap surfaces: Dry, unpolished, often dull, sometimes with adhering soil or debris.
• Growth Form: Solitary to scattered.
• Spore Print: White to cream.
• Body color: White to cream, staining yellowish or brownish with age/handling.
• Odor: Faint, sometimes slightly unpleasant.
• Flesh bruises: Does not change color when cut or bruised.
• Height: 3-8 cm (1.2-3.2 inches)
• Cap Diameter: 5-15 cm (2-6 inches)
• Nutrient gathering: Mycorrhizal

Quick Check

• Odor: Faint, sometimes slightly unpleasant or fishy, but not distinctive.
• Fruiting: Summer to fall (July-October).
• Substrate: Terrestrial, on soil in mixed forests, broadleaf woodlands, and conifer forests.

Where to Find

Finding Tips

Similar Species

Scientific Classification

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Russulales

Family

Russulaceae

Genus

Russula

Storage Information

• Max Temperature: 4°C
• Freezing duration: 6 months
• Min Temperature: 0°C
• Refrigeration: 5 days

How to Clean

Due to its tendency to grow partially buried and its often sticky cap surface, Russula delica can accumulate a lot of dirt and debris. Clean by gently brushing off soil with a soft brush or cloth. Avoid washing under running water if possible, as the flesh can absorb water and become soggy. If washing is necessary, do so quickly and pat dry immediately.

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