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Lentinus brumalis, commonly known as the Winter Polypore, is a widespread and easily recognizable saprobic fungus belonging to the family Polyporaceae. It is characterized by its tough, leathery texture, centrally-stemmed cap, and distinctively toothed or serrated gill-like pores on the underside. This species is notable for its ability to fruit during colder months, often persisting through light frosts, hence its common name.
How to Identify
- Cap
- The cap is typically 2-10 cm in diameter, circular to kidney-shaped, and often depressed in the center. Its color varies from yellowish-brown to dark brown, sometimes with a reddish tint, and it is usually covered with fine, dark, appressed scales or hairs, especially when young. The margin is often inrolled when young and becomes wavy or lobed with age. The surface is dry and dull.
- Gills
- The underside features a poroid surface, but these are not true gills. Instead, they are angular, radially arranged pores that often appear gill-like due to their elongated, labyrinthine, or even tooth-like structure. They are white to cream-colored, becoming yellowish with age, and are decurrent (running down the stem). The pore mouths are relatively large, 0.5-2 mm wide.
- Stem
- The stem is central or slightly eccentric, 2-8 cm long and 0.3-1 cm thick. It is tough, cylindrical, and often tapers towards the base. The color is similar to the cap, ranging from yellowish-brown to dark brown, and it is typically covered with fine, dark scales or hairs, especially towards the base. It is solid and fibrous.
- Flesh
- The flesh is thin, tough, and white to cream-colored, with a leathery consistency. It does not change color when bruised or cut.
- Fruiting body
- The fruiting body is a tough, leathery mushroom with a central or slightly eccentric stem and a cap that can range from convex to funnel-shaped.
- Habitat
- Saprobic, growing on dead hardwood logs, branches, and stumps, particularly on oak, beech, birch, and alder. It can be found solitary or in scattered groups.
Key Facts
- Cap surfaces: Dry, dull, finely scaly or hairy
- Growth Form: Solitary or scattered
- Spore Print: White
- Body color: Yellowish-brown to dark brown (cap and stem), white to cream (pores)
- Odor: Mild, mushroomy
- Flesh bruises: No
- Height: 2-8 cm
- Cap Diameter: 2-10 cm
- Nutrient gathering: Saprobic
Safe
SafeLentinus brumalis is considered non-toxic but is generally not recommended for consumption due to its extremely tough and leathery texture, even when young. It is not known to contain any harmful compounds, but its culinary value is negligible. There are no known toxic look-alikes that are easily confused with it, especially given its unique pore structure and tough consistency.
Quick Check
- Odor: Mild, mushroomy, or indistinct
- Fruiting: Late autumn to early spring, sometimes year-round in mild climates
- Substrate: Dead hardwood (saprobic)
Where to Find
Deciduous and Mixed Forests
Commonly found in temperate deciduous and mixed forests across North America, Europe, and Asia.
Woodlands
Prefers woodlands with abundant dead hardwood material.
Parks and Gardens
Can occasionally be found in urban parks and gardens where suitable dead wood is present.
Finding Tips
Look for Dead Hardwood
Focus your search on fallen logs, stumps, and branches of deciduous trees, especially oak, beech, and birch.
Check During Colder Months
While it can fruit year-round in some climates, it is most prevalent and noticeable from late autumn through early spring, often fruiting when other fungi are scarce.
Examine Underside Carefully
The distinctive gill-like pores are a key identification feature. Ensure they are angular and somewhat elongated, not true gills.
Similar Species
Hairy Polypore
fungus
Also known as: Polyporus arcularius
Spring Polypore
fungus
Also known as: Polyporus ciliatus
Dryad's Saddle
fungus
Also known as: Cerioporus squamosus
Scientific Classification
- Phylum
- Basidiomycota
- Class
- Agaricomycetes
- Order
- Polyporales
- Family
- Polyporaceae
- Genus
- Lentinus
Storage Information
- Max Temperature: 4°C
- Freezing duration: 6 months
- Min Temperature: 0°C
- Refrigeration: 3 days
How to Clean
Due to its tough texture, the Winter Polypore is not typically consumed. If one were to attempt to prepare it, brushing off debris and wiping with a damp cloth would be sufficient. Washing under running water is not recommended as it can absorb water and become even tougher.
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