E-Flora BC: Electronic Atlas of the Flora of British Columbia

Arctoparmelia separata (Th. Fr.) Hale
Arctic ring

Introduction to the Lichens

© Jim Riley  Email the photographer   (Photo ID #33829)

E-Flora BC Static Map
Distribution of Arctoparmelia separata
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Consortium of North American Lichen Herbaria map

Species Information

Medium to large stratified foliose lichens, corticate above and below, sorediate or not, lobes closely appressed, elongate, averaging to 0.3–0.5 mm wide, thin. Upper surface pale yellowish green, dull. Lower surface pale to black, apparently white-pruinose, bearing scattered, short, simple rhizines. Medulla white. Photobiont green.
Apothecia located over upper surface, disc brown; spores simple, ellipsoid, colourless, 8 per ascus.
Over acid rock in arctic-alpine to boreal localities.
Notes: Arctoparmelia consists of four species worldwide, all of which occur in B.C. For points of distinction with similar species in other genera, see the descriptions under Xanthoparmelia.
Species description:
Thallus lacking soredia AND Upper cortex firm, never eroding; lobe tips only rarely downturned AND Lower surface grey or black toward thallus centre; northern B.C.
Cortex K+ pale yellow, KC+ yellow; medulla C+ slowly yellow, KC+ reddish.
Alectoronic acid, atranorin and usnic acid.

Source: Lichens of British Columbia

Habitat / Range

Habitat: Infrequent over acid rock in open boreal localities
World Distribution: probably circumpolar, S to northern BC.

Source: Lichens of British Columbia

Synonyms and Alternate Names

Parmelia birulae var. grumosa Llano
Parmelia separata
Xanthoparmelia separata (Th. Fr.) Hale

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links

Additional Photo Sources

General References