Mica Cap

(Coprinellus micaceus)

Conservation Status
Mica Cap
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Mica Cap is a very common and very widespread mushroom. It has been collected in Europe, Asia, Africa, and North and South America. In the United States has been seen from coast to coast. It occurs from April through October in hardwood and mixed forests and woodlands. It grows in dense clusters usually on decaying hardwood stumps, logs, and woody debris, sometimes on the ground growing on buried wood. It obtains its nutrients from already decaying hardwood (saprobic), especially bark.

The cap when young is oval, tan to yellowish brown or tawny, and darkest in the center. It is narrowly grooved (striate) at least half way to the margin. It is covered with minute, loosely-attached, whitish, glistening particles. The particles are remnants of an egg-like structure (universal veil) that protected the newly emerging mushroom. The particles soon wash away with rain or dew and the cap first becomes bell-shaped then flattens out. The mature cap is ¾ to 2 in diameter and grayish, especially toward the margin. As it ages the margins dissolve progressively inward into black ink at that drips to the ground.

The gills are pale at first and crowded. They may be broadly attached to the stalk (adnate), narrowly attached (adnexed), or not attached (free). As they mature they turn gray or brownish, then ultimately black. As they release their spores they self-digest, turning into black ink at that drips to the ground.

The stalk is white, smooth, hollow, and fragile, It is usually 1¾ to 3 long and 1 16 to ¼ in diameter. Large individuals may be up to 4¾ tall.

The flesh is soft and white or pale. It is edible but thin and watery.

The spores are black.

 
     
 

Similar Species

 
     
     
 
Habitat and Hosts
 
 

Hardwood and mixed forests and woodlands, suburbs, urban areas

 
     
 
Ecology
 
 

Season

 
 

April through October

 
     
 
Distribution
 
 

Distribution Map

 

Sources

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

 
  9/7/2018      
         
 

Occurrence

 
 

Widespread and very common

 
         
 
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 Marasmiineae  
  Family Physalacriaceae  
  Genus Coprinellus  
  Section Micacei  
       
 

Mica Cap was originally classified in 1786 as Agaricus micaceus. In 1838 it was reclassified as Coprinus micaceus. In 2001 that genus was split and it became Coprinellus micaceus.

 
       
 

Synonyms

 
 

Agaricus micaceus

Coprinus micaceus

 
       
 

Common Names

 
 

Glistening Inky Cap

Mica Cap

 
       

 

 

 

 

 

Glossary

Saprobic

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

 

Striate

Striped or grooved in parallel lines (striae).

 

Universal veil

An egg-like structure that envelopes all or most of a developing gill mushroom. Remnants of the universal veil sometimes visible on a mature mushroom are patchy warts on the cap, a ring on the stem, and a volva at the base of the stem.

       
Visitor Photos
   

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Savannah Hanson
       

Found in my backyard!

  Mica Cap    
       
Alissa
       
  Mica Cap   Mica Cap
       
Stephanie Segner
       

Mica Cap or Coprinus micaceus or common inky cap. I found these in several places this season but these pictures were in my yard growing on a stump we pulled up last fall.

  Mica Cap   Mica Cap
       
  Mica Cap    
       
MinnesotaSeasons.com Photos
   

Cluster

  Mica Cap   Mica Cap
       

Mushroom

  Mica Cap    
       

Cap

  Mica Cap   Mica Cap
       

Gills

  Mica Cap   Mica Cap
       

Partially autodigested

  Mica Cap    
       
       

 

Camera

     
Slideshows
   
  Mica Cap (Coprinellus micaceus)
Bill Keim
 
  Mica Cap (Coprinellus micaceus)  

 

slideshow

       
Visitor Videos
       

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Other Videos
 
  On Mica Caps
The Richest Fare
 
   
 
About

Published on Mar 26, 2016

An overview of the mica cap mushroom as a wild edible.

Go to therichestfare.com for more about real food, healthy living and spiritual encouragement.

   
       
  Mica Cap Mushroom Identification - Morel Season Mushrooms
MiWilderness
 
   
 
About

Published on May 18, 2014

Thanks for watching MiWilderness.

   
       
  Coprinellus micaceus AKA Mica Cap Mushrooms Video/Daily Video V log while Mushroom Hunting
Walt Reven Jr
 
   
 
About

Published on Sep 24, 2017

Found in northwest arkansas in late july under a dead oak tree. Not much more to say, enjoy the video everyone :)

   
       
  Coprinellus micaceus, the mica cap. 4/9/11 in Shoreline, WA, USA.
Cyanescentinel
 
   
 
About

Published on Apr 9, 2011

Coprinellus micaceus, the mica cap. 4/9/11 in Shoreline, WA, USA.

http://www.mushroomexpert.com/coprinellus_micaceus.html

   
       

 

Camcorder

         
Visitor Sightings
   

Report a sighting of this fungus.

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Savannah Hanson
9/21/2018

Location: St. Paul, MN

Found in my backyard!

Mica Cap


Alissa
9/6/2018

Location: Fillmore County

Mica Cap


Stephanie Segner
6/10/2018

Location: Hennepin County, MN

Mica Cap or Coprinus micaceus or common inky cap. I found these in several places this season but these pictures were in my yard growing on a stump we pulled up last fall.

Mica Cap


     
     
 
MinnesotaSeasons.com Sightings
         

 

 

Binoculars


Created: 7/16/2018

Last Updated:

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