Powder-edged Speckled Greenshield

(Flavopunctelia soredica)

               
Conservation Status

IUCN Red List

not listed

Xxxxxxxxxx

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

Very widespread and very common

Habitat/Hosts

Hardwoods, including maple, New Jersey tea, ash, walnut, cherry, oak, sumac, locust, and willow; and conifers, including balsam fir, eastern redcedar, spruce, pine, and Douglas fir.

    Photo by Luciearl
 
Identification

Powder-edged Speckled Greenshield Is a medium-sized, common, and very widespread lichen. It occurs in Europe, Asia, Africa, and North and South America. It occurs across the United States, throughout Mexico, and in southern Canada. It is very common in Minnesota. It grown on the bark and wood of both hardwoods, including maple, New Jersey tea, ash, walnut, cherry, oak, sumac, locust, and willow; and on conifers, including balsam fir, eastern redcedar, spruce, pine, and Douglas fir. It very rarely grows on rock.

The vegetative body (thallus) is up to 4¾ in diameter, leaf-like (foliose), and divided into lobes. It may be closely pressing against the surface (appressed), or growing with the bark so that it can't be removed with a knife without fragmenting (adnate). It is attached to the substrate (bark or wood) by numerous tufted anchoring structures (rhizines). The rhizines are short, unbranched, and the same color as the lower surface of the thallus. They are dense toward the center and usually absent near the margins. The lobes are narrow, irregular, flat, and to 5 16 wide. Adjacent lobes touch but are not fused together. The upper surface is smooth or slightly wrinkled, pale green or yellowish-green to greenish-yellow, and frequently has white blotches. The underside is black to dark chestnut brown, except near the edges, which is sometimes pale brown. The margins are crescent-shaped and are densely covered with white reproductive granules (soredia). The upper side does not have soredia. Spore-producing structures (apothecia) are rarely produced. When present, they are dark brown, saucer-shaped, deeply concave, and 1 16 to ¼ (2 to 6 mm) in diameter.

 
Similar
Species

Speckled Greenshield (Flavopunctelia flaventior) lobes are usually broader.

 
Distribution Distribution Map  

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

 
Comments

 

 
Taxonomy

Division:

Ascomycota (sac fungi)

 

No Rank:

saccharomyceta

 

Subdivision:

Pezizomycotina

 

No Rank:

leotiomyceta

 

Class:

Lecanoromycetes

 

Subclass:

Lecanoromycetidae

 

Order:

Lecanorales

 

Suborder:

Lecanorineae

 

Family:

Parmeliaceae

 

Mycobiont:

Flavopunctelia soredica

 

Photobiont:

 

 
Synonyms

 

 
Common
Names

Powder-edged Speckled Greenshield

 

 

 

 

 

Glossary

Apothecium

An open, disk-shaped or cup-shaped, reproductive structure, with spore sacs on the upper surface, that produces spores for the fungal partner of a lichen. Plural: apothecia.

 

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.

 

Rhizine

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

 

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.

       
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Luciearl
       
  Powder-edged Speckled Greenshield    
       
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Luciearl
8/28/2019

Location: Cass County

Powder-edged Speckled Greenshield


     
     
 
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Created: 9/26/2019

Last Updated:

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