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Birch polypore

Fomitopsis betulina

A species of Fomitopsis, Also known as Razor strop

The birch polypore has a variety of applications. Its thick skin has been used by barbers as a razor sharpener and as a mount for insect collectors. When dried, this mushroom was also used to carry fire over long distances because it burns slowly. The historical use of birch polypore doesn't stop there; pieces of this mushroom were found being carried by the five-thousand-year-old mummy Ötzi the Iceman.

Cap Diameter:

5 - 25 cm

Odor:

Strong, fragrant when fresh; mildly mushroomy.

General Info About Birch polypore

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Attributes of Birch polypore

Cap Diameter

5 - 25 cm

Height

5 - 8 cm

Cap

2.5 - 25 cm wide; pale, with greyish-brown top surface, creamy white underside; smooth; rounded margin

Cap Shape

Convex

Cap Surfaces

Smooth

Stem

Up to 6 cm long; lateral, thick

Flesh

Soft, then becomes corky and firm as the fruiting body matures; whitie

Ring

Middle of the stalk

Spore Print Color

White

Odor

Strong, fragrant when fresh; mildly mushroomy.

Body Color

Brown

Gray

White

Cream

Flesh Bruises

The flesh or milk does not discolor when bruised or cut.

Growth Form

Solitary, Gregarious

Nutrient Gathering

Saprophytic

Substrate

Dead Woods, Wood of Living Trees

You can find Birch polypore by these plants:

Paper birch, Downy birch, Silver birch

Occurence Habitats

Deciduous Woodland

Species Status

Geographic distribution to be restricted to the Northern Hemisphere

Endangered Species

How to Identify Birch polypore

Fruiting Body Cap Flesh

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Habitat of Birch polypore

As its name implies, the birch polypore can be found in areas populated by birch, though it's been documented on oak and willow. It grows on dead trees - on rotting logs and stumps, but it can appear on a weakened living tree, as well.

Distribution Area of Birch polypore

North America,Europe,northern Asia

Hunting Values of Birch polypore

Only edible when young and has a bitter taste.

Uses of Birch polypore

Birch polypore is a mushroom species recognized for its conditional edibility. It holds practical value, particularly in traditional medicinal practices, though caution is advised due to potential adverse effects when consumed improperly. The collection and use of birch polypore require awareness of its preparation requirements to mitigate health risks. Its popularity among foragers and natural remedy enthusiasts may vary based on these precautions and the knowledge required to safely utilize it.

Scientific Classification of Birch polypore

Phylum

Club fungi

Class

Mushroom-forming fungi

Order

Shelf fungi

Family

Bracket polypores

Genus

Fomitopsis

Similar Species to Birch polypore

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Tips for Finding Birch polypore

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When is the Best Time to Find Birch polypore

Search for birch polypore in late summer to autumn, as cooler temperatures and moist conditions after rainfall promote its growth. Aim for periods following consistent wet weather.

What are Some Tips for Finding Birch polypore

Target areas with a high density of birch trees to maximize the chance of encountering birch polypore.
Inspect fallen logs, stumps, and branches of birch trees for signs of birch polypore.
Look for birch polypore on the shaded side of birch tree trunks, which may retain more moisture.
Gently probe deteriorating wood on birch trees, as birch polypore may be found within or underneath bark layers.

How to Clean and Preserve Birch polypore

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How to Clean Birch polypore

To clean birch polypore, gently brush off any debris from its surface using a soft brush. If necessary, lightly dampen a cloth and wipe the mushroom to remove dirt. Avoid soaking as it may affect the mushroom's structure.

Tips on Dry Preservation of Birch polypore

Drying Methods

Dehydrator Drying, Oven Drying

Drying Duration

12 - 24 months

Store in a dark, cool, dry place with airtight containers to prevent moisture re-entry.

Dehydrator drying: Efficient for consistent heat and airflow, suitable for high-moisture species.

Oven drying: Set at the lowest temperature with the door slightly open, ideal for quicker drying.

Tips on Freezing Preservation of Birch polypore

Freezing Methods

Blanching Before Freezing

Freezing Duration

8 - 12 months

Blanching before freezing: Briefly immersing in hot water to inactivate enzymes before freezing.

Tips on Refrigeration Preservation of Birch polypore

Refrigerating Methods

Paper Bag Storage, Perforated Plastic Bag Storage, Cardboard Box Storage, Container with Absorbent Lining

Temperature

0 - 4 ℃

Refrigerating Humidity

90 - 95 %

Refrigerating Duration

7 - 10 days

Paper Bag Storage: Store in paper bags to absorb excess moisture and allow for air circulation.

Perforated Plastic Bag Storage: Use perforated bags to maintain humidity while providing airflow.

Cardboard Box Storage: Line a cardboard box with paper towels for moisture control.

Container with Absorbent Lining: Place mushrooms in a container with a paper towel to contain moisture yet allow breathing.

Common Questions People Also Ask

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More Mushrooms That Are Similar to Birch polypore

Willow bracket

Phellinus igniarius