White Cheese Polypore

(Tyromyces chioneus)

Conservation Status
White Cheese Polypore
  IUCN Red List

not listed


not listed


not listed


White Cheese Polypore medium-sized, common, widespread, fleshy, bracket (shelf-like) fungus. It is not edible.

It lives on decaying stumps and logs (saprobic). It is found singly or in groups of two or three living usually on dead hardwoods, occasionally on dead conifers.

The fruiting body is annual. There is no stem.

The bracket (cap) is fan-shaped to semicircular in outline, broadly convex or flat, ¾ to 4¾ wide, and ¾ to 3 deep, and to 1 thick. The upper surface is white and densely covered with fine, white hairs at first. As it ages it becomes hairless and yellowish-buff. Older specimens are crusty and wrinkled or shriveled. It does not have well-defined zones. The flesh is white, soft or spongy and watery, and fragrant when fresh,crumbly when dry. The texture of mature bracket is cheesy, which accounts for the common name of this fungus.

The pore surface on the underside of the bracket is white at first, becoming yellowish with age. There are 3 to 5 pores per millimeter. The pores may be 1 16 to ¼ deep, but are usually no more than deep. The spore print is white.


Similar Species

Habitat and Hosts

Woodlands. Usually on dead hardwoods, occasionally on dead conifers.




July through December


Distribution Map



4, 7, 24, 26, 29 30, 77.




Common and widespread

  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Division Basidiomycota (club fungi)  
  Subdivision Agaricomycotina (jelly fungi, yeasts, and mushrooms)  
  Class Agaricomycetes (mushrooms, bracket fungi, puffballs, and allies)  
  Subclass Agaricomycetidae  
  Order Polyporales (shelf fungi)  
  Family Incrustoporiaceae  
  Genus Tyromyces  

A recent study (Justo et al., 2017) reviewed the Polyporales based on new molecular DNA data. The genera were realligned within three new and fifteen existing families. The genusTyromyces was transferred from the family Polyporaceae to the family Incrustoporiaceae. White Cheese Polypore is the only member of the family Incrustoporiaceae that occurs in Minnesota.




Bjerkandera chionea

Boletus candidus

Leptoporus albellus

Leptoporus albellus subsp. chioneus

Leptoporus chioneus

Leptoporus chioneus f. chioneus

Leptoporus chioneus f. pellucida

Leptoporus lacteus f. albellus

Polyporus albellus

Polyporus candidus

Polyporus chioneus

Polystictus chioneus

Tyromyces albellus

Tyromyces albellus f. albellus

Ungularia chionea


Common Names


White Cheese Polypore









The vegetative part of a fungus; consisting of a mass of branching, thread-like hyphae, through which a fungus absorbs nutrients from its environment; and excluding the fruiting, reproductive structure.



A term often used for saprotrophic fungi. Referring to fungi that obtain their nutrients from decayed organic matter.





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Margot Avey

    White Cheese Polypore      
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    White Cheese Polypore   White Cheese Polypore  
    White Cheese Polypore      






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Other Videos
  White Cheese Polypore

Uploaded on Nov 18, 2011

White Cheese Polypore wild mushrooms hunting. Clear close up HD pictures and videos




Visitor Sightings

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  Margot Avey

Location: Minnesota Landscape Arborateum, Chanhassan, MN

White Cheese Polypore  
  Apricity Apricity
Fall 2021

Location: Martin County, Fairmont, MN

  Mary Munn

Location: SE Carlton County

Posted pics/comments on https://www.facebook.com/groups/481958225234656/#
Growing on long dead Balsam or a white spruce - forgot to confirm - definitely a fir.

MinnesotaSeasons.com Sightings




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