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Montana Field Guide

Montana Field Guides

A Lichen - Melanohalea septentrionalis
Other Names:  Melanelia septentrionalis, Parmelia septentrionalis

Species of Concern

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

Agency Status
MNPS Threat Rank:

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State Rank Reason (see State Rank above)
Montana occurs on the southern edge of this species range, where it has been found occasionally.
General Description
Thallus foliose to 5(7) cm diameter and upper surface olive brown to dark brown, dull or shiny, occasionally pruinose; lower surface generally dark brown or black, occasionally pale brown, and smooth or wrinkled; lobes (0.5)1-3(4) mm broad; isidia and soredia lacking; apothecia abundant to 3(5) mm diameter, generally crowded in the center and occurring nearly to the thallus margin; 8 spores per ascus; apothecial margins with many pseudocyphellae (McCune and Geiser 2009). Chemistry: Medulla P+ yellow, orange, or red (McCune and Geiser 2009).

Diagnostic Characteristics
Similar to M. subolivacea and M. multispora, but differing in chemistry (P-).

Range Comments
Circumpolar, arctic and boreal, south to Montana, British Columbia, Alberta, and Great Lakes, and New England (McCune and Goward 1995).

On bark in areas of low elevation 'bogs'.

Reproductive Characteristics
Reproduces sexually by spores from apothecia.

Threats or Limiting Factors
None identified.

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Citation for data on this website:
A Lichen — Melanohalea septentrionalis.  Montana Field Guide.  .  Retrieved on , from