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Yellow stainer

Agaricus xanthodermus

A species of Agaricus, Also known as Yellowing staining agaricus

The yellow stainer grows across North America and Europe and has been imported to Australia. It can be distinguished from other common white mushrooms by the bright chrome yellow color it turns when bruised. It is known to be poisonous, causing cramps, nausea, and purging. Unfortunately, it often gets accidentally eaten as it looks similar to several edible white mushrooms.

Cap Diameter:

5 - 17 cm

Odor:

Chemical-like with phenolic, inky notes.

General Info About Yellow stainer

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Attributes of Yellow stainer

Cap Diameter

5 - 17 cm

Height

5 - 20 cm

Cap

Cap 6 - 15 cm across; round to convex, flat; white to cream, gray, brownish; surface smooth

Cap Shape

Convex, Flat

Cap Surfaces

Smooth, Fibrillose-scaly

Gills

Free; crowded; pinkish gray to dark chocolate-brown

Gill Attachment

Free

Stem

Stem 4 - 15 cm long, 1 - 3 cm thick; bulbous; whitish; turns bright chrome yellow when cut

Stem Shapes

Club Shaped

Stem Surfaces

Smooth

Stem Cross Sections

Hollow or cottony hollow

Flesh

White; turns yellowing when sliced

Ring

On the stem; thick; flaring; yellow

Ring

With Ring

Spore Print Color

Chocolate-brown

Odor

Chemical-like with phenolic, inky notes.

Body Color

Brown

Yellow

White

Flesh Bruises

Discolor to yellowish

Growth Form

Scattered, Gregarious

Nutrient Gathering

Saprophytic

Substrate

On soil

You can find Yellow stainer by these plants:

Pines

Occurence Habitats

Meadows, Disturbed Lands, Coniferous Woodland, Deciduous Woodland

Species Status

Widely distributed

Endangered Species

How to Identify Yellow stainer

Fruiting Body Immature Fruiting Body Cap

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Habitat of Yellow stainer

The yellow stainer mushroom appears most often in fields, parks, and cultivated ground, although it is sometimes found in the more open sections of woodland. It feeds on detritus like decomposing plant matter and dung.

Distribution Area of Yellow stainer

North America,Europe,North Africa,Asia,Australia

Scientific Classification of Yellow stainer

Phylum

Club fungi

Class

Mushroom-forming fungi

Order

Gilled fungi

Family

Agaricaceae

Genus

Agaricus

Toxicity and Edibility of Yellow stainer

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Is Yellow stainer Toxic?

Yellow stainer commonly thrives in gardens, compost heaps, and woodlands during late summer and in autumn. Distinguishable through a pronounced yellow discoloration at the base of the stem, yellow stainer can cause gastrointestinal irritations, vertigo, vision impairment, and ramifications on blood circulation. Beware as it resembles edible Agaricus species, but proves toxic for consumption.

Type of poisoning

Gastrointestinal

Toxic Severity

Low to high toxicity

Incubation Period

0.5-6 hours

Poisoning Symptoms

Digestive issues, vertigo, vision complications, blood circulation troubles.

Is Yellow stainer Toxic to Dogs?

Yellow stainer is highly toxic to dogs and can cause death. If you think your dog may have eaten this mushroom seek immediate medical help. This mushroom is a gastrointestinal irritant but the exact toxic substance is unknown. Immediate symptoms of yellow stainer poisoning include nausea, vomiting, stomach cramps, and diarrhea. This is a common backyard mushroom, increasing the chance of pet poisonings.

Similar Species to Yellow stainer

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Tips for Finding Yellow stainer

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What are the Ideal Soil Conditions for Yellow stainer

Prefers disturbed soils; frequently found in nutrient-rich, well-drained substrates.

What are Some Tips for Finding Yellow stainer

Search in open grassy and cultivated areas, especially where the soil has been recently disturbed.
Look for clusters or arcs of mushrooms, which yellow stainer tends to form.
Inspect along hedgerows, garden edges, and paths for yellow stainer's presence.
Observe any rings or groups of mushrooms in open woodland and grassland surroundings, noting yellow stainer's tendency toward such growth patterns.
Gently probe underground near the base of mushroom clusters to find hidden specimens of yellow stainer.