Bottlebrush Frost Lichen

(Physconia detersa)

               
Conservation Status

IUCN Red List

not listed

Bottlebrush Frost Lichen

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

Widespread and very common

Habitat/Hosts

Bark, rock, and cemetery headstones

   
 

 

    Photo by Luciearl
 
Identification

Bottlebrush Frost Lichen is a common, widespread, medium-sized lichen. It occurs throughout the Northern Hemisphere including Europe, Asia, Greenland, and North America. It occurs throughout the United States except in the deep south. It is very common in Minnesota.

The vegetative body (thallus) is leaf-like (foliose) , divided into radiating lobes (a rosette), and usually up to 2¾ (7 cm) in diameter, rarely up to 3½ (9 cm) in diameter. It is held to the substrate by black, branched, root-like structures (rhizines). The lobes are long with straight sides (linear), usually rounded at the tip, sometimes irregular. can be 1 32 to (1 to 3 mm) wide, but are usually no more than 1 16 wide. The upper surface is shiny and gray to brownish-gray when dry, greenish brown when moist. Part or occasionally almost all of the lobe ends have a white, flour-like or frost-like covering (pruinose). This is the feature that gives the genus its common name “frost lichens.” The surface is also covered with reproductive granules (soredia). The underside is dark brown to black near the center, dark tannish-brown toward the lobe ends, almost never white.

Bottlebrush Frost Lichen rarely produces disk-like spore producing structures (apothecia). When present, they are 1 32 to (1 to 3 mm) in diameter.

 
Similar
Species

 

 
Distribution Distribution Map  

Sources: 4, 24, 26, 29, 30, 77, 81.

 
Comments

Taxonomy
Until recently all Physconia species were included in the genus Physcia.

 
Taxonomy

Division:

Ascomycota (sac fungi)

 

No Rank:

saccharomyceta

 

Subdivision:

Pezizomycotina

 

No Rank:

leotiomyceta

 

Class:

Lecanoromycetes

 

Subclass:

Lecanoromycetidae

 

Order:

Teloschistales

 

Family:

Physciaceae

 

Genus:

Physconia (frost lichens)

 

Mycobiont:

Physconia detersa

 

Photobiont:

 

 
Synonyms

 

 
Common
Names

Bottlebrush Frost Lichen

Frosted Lichen

 

 

 

 

 

Glossary

Foliose

Adjective: Leaf-like growth form; referring to lichens with leaf-like growths divided into lobes.
Noun: The leaf-like, vegetative body of a lichen (thallus) that has thin, flat lobes which are free from the substrate.

 

Linear

Long, straight, and narrow, with more or less parallel sides, like a blade of grass.

 

Rhizine

A root-like structure of a lichen that attaches the lower layer to the substrate.

 

Rosette

A radiating group or cluster of leaves usually on or close to the ground.

 

Soredium

The reproductive structure of a lichen consisting of a cluster of algal cells (the photobiont) wrapped in fungal filaments (the mycobiont). Plural: soredia.

 

Thallus

The vegetative body of a lichen composed of both the alga and the fungus. Plural: thalli.

       
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Luciearl
       
  Bottlebrush Frost Lichen   Bottlebrush Frost Lichen
       
  Bottlebrush Frost Lichen   Bottlebrush Frost Lichen
       
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Luciearl
1/1/2020

Location: Cass County

Bottlebrush Frost Lichen


Luciearl
11/29/2019

Location: Cass County

Bottlebrush Frost Lichen


     
     
 
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Created: 12/10/2019

Last Updated:

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