dcsimg

Description

provided by The lichen genus Psora LifeDesk

Squamules: up to 3 mm wide, elongate, adjacent or partly ascending, weakly concave to plane; upper surface: medium brown, dull, becoming densely pruinose, smooth; margin: concolorous with upper side, often slightly up-turned, not pruinose, crenulate or lobed; upper cortex: up to 140 μm thick, composed of rather thick-walled hyphae with somewhat angular lumina, containing crystals of calcium oxalate but no lichen substances; medulla: containing lichen substances but no calcium oxalate; lower cortex: poorly developed, composed of mainly periclinally oriented hyphae, not containing calcium oxalate; lower surface: pale brown; Apothecia: up to 1.5 mm diam., laminal, convex and immarginate even when young, medium brown to reddish brown, epruinose; ascospores: 11-15 ´ 5.5-7 μm (n=20); Pycnidia unknown; Spot tests: upper cortex K-, C-, KC-, P-, medulla K-, C-, KC-, P+ red; Secondary metabolites: pannarin.

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Timdal, Einar
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Timdal, Einar

Diagnostic Description

provided by The lichen genus Psora LifeDesk

The species is recognized by the densely pruinose squamules with an up-turned, epruinose margin, and by the presence of pannarin which is unique in Psora.

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cc-by-nc
copyright
Timdal, Einar
author
Timdal, Einar

Distribution

provided by The lichen genus Psora LifeDesk

California and Baja California del Norte.

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Timdal, Einar
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Timdal, Einar

Habitat

provided by The lichen genus Psora LifeDesk

On soil in open habitats, in Vizcaino subdivision of Sonoran Desert and in Californian coastal scrub, up to 230 m alt.

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cc-by-nc
copyright
Timdal, Einar
author
Timdal, Einar

Look Alikes

provided by The lichen genus Psora LifeDesk

Psora californica, Psora peninsularis.

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cc-by-nc
copyright
Timdal, Einar
author
Timdal, Einar