Brown roll-rim

Paxillus involutus

A species of Rollrims. Also known as Common roll-rim, Naked brimcap.

This ubiquitous broad-capped fungus thrives globally in the temperate regions of both the northern and southern hemispheres. Brown roll-rim mushrooms are recognized as toxic when ingested; raw consumption results in immediate digestive distress, while even cooked, they inflict damage on essential bodily organs, ultimately proving fatal over a prolonged period.

Attributes of Brown roll-rim

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Cap Diameter
5 - 15 cm
Height
6 - 12 cm
Cap
Cap 4 - 15 cm across; convex to flat; ocher-buff to olive-buff, tan to brown; surface smooth, with finely downy
Cap Shape
Convex, Depressed
Cap Surfaces
Smooth, Slimy or slightly sticky, Visible lines or stripes
Gills
Decurrent; close, crowded; ocher-buff to brown; turns dark brown when bruised
Gill Attachment
Decurrent
Stem
Stem 2 - 8 cm long, 2 cm thick; buff; surface smooth, with finely hairy; turns brownish to reddish brown when bruised
Stem Shapes
Tapering
Stem Surfaces
Smooth
Flesh
Thick; firm; yellowish; turns brown when exposed
Ring
Ringless
Spore Print Color
Brown
Odor
Mild, non-distinctive or faintly fragrant.
Body Color
BrownGreenYellowGray
Flesh Bruises
Discolor to brown
Growth Form
Solitary, Scattered, Gregarious
Nutrient Gathering
Mycorrhizal, Saprophytic
Substrate
On soil, Dead Woods
You can find Brown roll-rim by these plants
Pines, Spruces, Oaks, Populus
Occurence Habitats
Deciduous Woodland, Coniferous Woodland, Mixed Woodland, Meadows
Species Status
Widely distributed
Endangered Species
No

Scientific Classification of Brown roll-rim

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Phylum
Club fungi
Class
Mushroom-forming fungi
Order
Boletes and allies
Family
Paxillaceae
Genus
Rollrims
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Toxicity and Edibility of Brown roll-rim

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Is Brown roll-rim Toxic?

The Brown roll-rim mushroom thrives in acidic deciduous and coniferous forests, often in nutrient-poor ground during the warmer months. Its distinctive features include a convex cap that flattens as it matures and a margin that rolls inward. Ingesting this mushroom, particularly uncooked, can lead to serious health issues such as the breakdown of red blood cells, anemia, kidney malfunction, yellowing of the skin, or even death.

Type of poisoning
Immunohemolytic
Toxic Severity
Extreme toxicity
Incubation Period
2-14 days
Poisoning Symptoms
Symptoms may include the destruction of red blood cells, leading to anemia, jaundice, kidney failure, and in severe cases, death. The risk of an adverse reaction predominantly exists with raw mushrooms that have hemolysins.

Is Brown roll-rim Toxic to Dogs?

Brown roll-rim can be dangerous to dogs. If your pet has consumed this mushroom, seek immediate veterinary attention. Symptoms may vary, but early intervention is crucial for the best outcome.

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