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Montana Field Guide

Montana Field Guides

A Lichen - Evernia divaricata
Other Names:  Lecanora granatina

Potential Species of Concern

Global Rank: G4G5
State Rank: S1S2
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:

External Links






State Rank Reason (see State Rank above)
Populations have a very spotty distribution in Montana.
 
General Description
Thallus fruticose and pendulous to 30 cm long (lowland variant) or prostrate to 5 cm long (alpine variant). Thallus cream-yellow when fresh, turning reddish-brown in the herbarium; cortex frequently broken, exposing the medulla; medulla loose (lowland variant) or fairly dense (alpine variant); apothecia rare (lowland variant) or lacking (alpine variant) McCune and Geiser 2009. Chemistry: Cortex KC+ yellow; Medulla UV+ blue-white McCune and Geiser 2009.

Species Range
Present
 


Range Comments
Alpine Variant: Arctic-alpine south through the Rocky Mountains to Arizona and New Mexico (McCune and Geiser 2009). Lowland Variant: Rocky Mountains of British Columbia and Alberta south to New Mexico and Arizona (McCune and Geiser 2009).

Summary of Observations Submitted for Montana
Number of Observations: 7

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
On trees in moist coniferous forests (lowland variant) or on alpine sod (alpine variant).

Ecology
Both the alpine and lowland variants have been found in Montana.

Reproductive Characteristics
Fragmentation (?) and occasionally by spores from apothecia (lowland variant).

Threats or Limiting Factors
This lichen is a dispersal limited species.

References
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Citation for data on this website:
A Lichen — Evernia divaricata.  Montana Field Guide.  .  Retrieved on , from