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Montana Field Guide

Montana Field Guides

A Lichen - Lobaria scrobiculata

Species of Concern

Global Rank: G4
State Rank: S1
* (see State Rank Reason below)

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

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State Rank Reason (see State Rank above)
Known from one location in western Montana.
 
General Description
Thallus foliose, mostly 2-10 cm broad, with broadly rounded lobes mostly 1-5 cm wide; upper surface yellowish-tinged pale green to olive gray when dry, dark gray when wet, weakly ridged or undulating; upper cortex often scabrous near the lobe tips, but lacking tiny hairs; photobiont blue-green; soralia roundish; and apothecia rare (McCune and Geiser 2009). Chemistry: Cortex KC+ yellow; medulla K+ yellow to orange, P+ orange (rarely P-), C-, KC+ red; spot tests are often weak (McCune and Geiser 2009).

Diagnostic Characteristics
L. scrobiculata is occasionally confused with L. hallii, which differs in having tiny hairs on the upper surface near the lobe tips and in chemistry. When dry they can be separated by color; L. scrobiculata usually has a distinct yellowish tinge while L. hallii is gray. Because these species are rare, they should be collected very sparingly or not at all.

Species Range
Present
 


Range Comments
Lobaria scrobiculata is an incompletely circumboreal species. It occurs primarily in boreal regions of the northern hemisphere and in New Zealand in the southern hemisphere. In North America its range stretches south to North Carolina (Blue Ridge Parkway) in the Appalachian mountains, Michigan, Minnesota, Manitoba, Idaho, Oregon, and Washington.

Summary of Observations Submitted for Montana
Number of Observations: 2

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Relative Density

Recency

 

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



Habitat
Tree bases, mossy rocks, and soil.

Ecology
Photobiont: green algae and cyanobacteria (nitrogen-fixer).

Reproductive Characteristics
Reproduces asexually by soredia; occasionally reproduces sexually by spores from the apothecium.

Threats or Limiting Factors
None identified.

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