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Montana Field Guide

Montana Field Guides

Fringed Chocolate Chip Lichen - Solorina spongiosa

Species of Concern
Native Species

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

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Known from a few locations in western and central portions of Montana.
General Description
Thallus squamulose, a narrow rim around the apothecia; cephalodia forming a finely dissected mass of short, narrow, somewhat erect lobes; and apothecia with 4 spores per ascus (McCune and Geiser 2009).

Diagnostic Characteristics
Thallus is a narrow rim around the apothecia; Examine thin sections of the apothecia under the compound microscope and look for 4 spores per ascus; Cephalodia form a finely dissected mass of short, narrow, and somewhat erect lobes (McCune and Geiser 2009).

Range Comments
Alaska to Montana and Oregon, with southern disjuncts in the mountains of Arizona, California, Nevada, and New Mexico (McCune and Geiser 2009).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

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



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

In moist moss mats on soil, adjacent to spring, seeps, waterfalls, and creeks; in alpine/subalpine zones.

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

Reproductive Characteristics
Reproduces sexually by spores from the apothecium.

Threats or Limiting Factors
None identified.

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Citation for data on this website:
Fringed Chocolate Chip Lichen — Solorina spongiosa.  Montana Field Guide.  .  Retrieved on , from