Flame Shield

(Pluteus aurantiorugosus)

Conservation Status
Xxxxxxxxxx
Photo by Maureen Burkle
  IUCN Red List

not listed

 
  NatureServe

not listed

 
  Minnesota

not listed

 
           
           
           
           
 
Description
 
 

Flame Shield is a beautiful but rare wood-rotting gill mushroom. It occurs in Europe, Japan, South Korea, North America, and Mexico. In North America its range is restricted to the northeast and upper Midwest. It is rare wherever it occurs, including in Minnesota. It is found alone or in small groups on long dead stumps and well-rotted logs and branches of deciduous trees, especially elm but also ash and possibly other hardwoods. It gets its nutrients from decaying wood (saprobic).

The cap is ¾ to 23 16 (20 to 55 mm) in diameter. It is convex and bright orange to orangish-red at first. As it ages fades to orangish-yellow, flattens out and becomes depressed in the middle. Older caps sometimes have a raised bump in the middle (umbonate). The upper surface may be dry or moist, and smooth to the touch or slightly granular, especially near the center. The margin is straight and unlined or only faintly lined (striate).

The stem is 13 16 to 2 (3 to 6 cm) long and 3 16 to (5 to 10 mm) thick. It is whitish to yellowish near the top, flushed with the same color as the cap near the bottom, and covered with ling fibers. The vegetative part of the mushroom (mycelium) is visible at the base of the stem. The basal mycelium is white or yellowish and woolly.

The gills are broad, closely spaced to nearly crowded, and not attached to the stem (free). They are whitish at first, often yellowish near the margin, turning pinkish with age. Between the primary gills there are short, secondary gills originating at the margin.

The flesh is white or pale yellow and firm. It does not change color when cut. It is edible but the taste is “not distinctive”. It may contain Psilocybin, a hallucinogenic substance. For this reason, and due to the mushroom’s rarity, collecting is not advised.

The spore print is pink.

 
     
 

Similar Species

 
     
     
 
Habitat and Hosts
 
 

Woodlands. Hardwood stumps and logs

 
     
 
Biology
 
 

Season

 
 

Early summer to late fall

 
     
 
Distribution
 
 

Distribution Map

 

Sources

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

 
  9/16/2021      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Division Basidiomycota (club fungi)  
  Subdivision Agaricomycotina (jelly fungi, yeasts, and mushrooms)  
  Class Agaricomycetes (mushroom-forming fungi)  
  Subclass Agaricomycetidae  
  Order Agaricales (common gilled mushrooms and allies)  
  Suborder Pluteineae  
  Family Pluteaceae  
  Genus Pluteus (deer mushrooms)  
       
 

Synonyms

 
 

Agaricus aurantiorugosus

Pluteus caloceps

Pluteus coccineus

Pluteus leoninus

Pluteus leoninus var. coccineus

 
       
 

Common Names

 
 

Flame Shield

 

 

 

 

 

 

 

Glossary

Mycelium

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.

 

Saprobic

Obtaining nutrients from non-living organic matter, such as decaying plant or animal matter.

 

Striate

Striped or grooved in parallel lines (striae).

 

Umbonate

On mushrooms, having a distinct, raised, knob-like projection in the center of the cap.

 
 
Visitor Photos
 
           
 

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Brandon Stimpel

 
    Flame Shield      
 

Maureen Burkle

 
 

There were only two, both near each other on same decaying hardwood (hackberry, maple or pine most likely) in the Izaac Walton Wetlands Preserve in SE Minnesota, Olmsted County.

  Flame Shield  
           
    Flame Shield   Flame Shield  
           
 
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Visitor Sightings
 
           
 

Report a sighting of this fungus.

 
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  Brandon Stimpel
9/16/2021

Location: Palmer Lake Park, Minneapolis, MN

Flame Shield

 
  Maureen Burkle
9/15/2019

Location: Izaac Walton Wetlands Preserve in SE Minnesota, Olmsted County

There were only two, both near each other on same decaying hardwood (hackberry, maple or pine most likely) in the Izaac Walton Wetlands Preserve in SE Minnesota, Olmsted County.

Flame Shield

 
           
 
MinnesotaSeasons.com Sightings
 
 

 

 

 

 

Binoculars


Created: 9/23/2019

Last Updated:

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