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Montana Field Guide

Montana Field Guides

Fingered Shingle Lichen - Parmeliella triptophylla
Other Names:  Black-bordered Shingle Lichen, Pannaria triptophylla

Species of Concern
Native Species

Global Rank: G5
State Rank: S1
(see State Rank Reason below)

Agency Status


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State Rank Reason (see State Rank above)
Locally rare when found.
General Description
Thallus squamulose to small foliose, though often the thallus partially dissolves into granules. Upper surface gray-brown to nearly black; hypothallus black, conspicuous; Photobiont is blue-green. Thallus with flattened lobules and isidia that occur laminal on the surface; these often develop thickly and obscure the thallus. Marginal lobes are not much enlarged; apothecia rare McCune and Geiser 2009 and (McCune and Goward 1995).

Species Range

Range Comments
Widespread in cool temperate parts of the northern hemisphere (Jorgensen 2000).

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 environments at tree bases, on rocks, and on moss over rocks.

Reproductive Characteristics
Reproduces asexually by isidia.

Threats or Limiting Factors
None identified.

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Citation for data on this website:
Fingered Shingle Lichen — Parmeliella triptophylla.  Montana Field Guide.  .  Retrieved on , from