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

Arctoparmelia incurva (Pers.) Hale
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Introduction to the Lichens

© Jim Riley  Email the photographer   (Photo ID #12608)

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

Species Information

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Illustration By: Trevor Goward

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 sorediate or apparently sorediate AND Upper cortex firm; soredia confined to large, discrete, orbicular soralia
Cortex K+ yellow; medulla KC+ reddish, I+ blue.
Alectoronic acid, atranorin and usnic acid.

Source: Lichens of British Columbia

Habitat / Range

Habitat: Infrequent over acid rock in open inland sites, reported only in ICH zone
World Distribution: circumpolar, S to BC.

Source: Lichens of British Columbia

Synonyms and Alternate Names

Parmelia incurva
Xanthoparmelia incurva (Pers.) Hale

Taxonomic and Nomenclatural Links

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General References