Peltula michoacanensis (B. de Lesd.) Wetmore — Overview

Peltula Lichen learn more about names for this taxon

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Description

 Thallus: squamulose, widely scattered; squamules: concave and cone shaped, 1-2 mm in diam., shallowly or deeply lobed; margins: ascending; upper surface: tan-olive, not sorediate; upper cortex: not developed but with a yellowish epinecral layer (up to 12 µm thick); medulla: composed of loosely to densely interwoven hyphae of elongated cells; algal layer: indistinctly delimited above; lower cortex: 25-50 µm thick, 3-5 layers of globose hyphal cells; lower surface: paler than the upper surface, attached by a central branched umbilicus; Apothecia: one per squamule, immersed in the center of concave squamules; disc: light brown, according to Wetmore (1970), 0.5-1 mm in diam.; epihymenium: light brown, K-; hymenium: I+ wine-red (probably due to the reaction of ascus walls), 150-220 µm high, >100-spored; ascospores: ellipsoid to bacilliform, 6.1-7.7 x 3.4-4.6 µm; Pycnidia: immersed, chambered; conidia: fusiform, 3.1-3.7 x 1.2-1.8 µm; Spot tests: all negative; Secondary metabolites: none detected.; Substrate and ecology: on soil over acidic or calcareous rocks in deserts and other open, arid habitats; World distribution: SW North America to central Mexico and India; Sonoran distribution: desert areas of southern California. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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