Caloplaca albovariegata (B. de Lesd.) Wetmore — Overview

Variegated Orange Lichen learn more about names for this taxon

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Description

 Life habit: lichenized; Thallus: crustose, areolate, margin abrupt at edge, without elongated lobes; prothallus: absent; surface: gray to blue-gray, smooth, without asexual propagules; cortex: cellular, thick, without granules; Apothecia: adnate to stipitate, 0.4-0.8 mm in diam., lecanorine; disc: black, flat, epruinose; margin: persistent, flush; thalline margin present, concolorous with thallus: proper margin not visible or visible, concolorous with disc; parathecium: cellular (paraplectenchymatous) including exciple below hypothecium; epihymenium: brown, K+ violet, H+ violet, 10%N + violet, cN+ violet, C+ violet; hymenium: hyaline, 70-115 µm tall; paraphyses: 2-3 tip cells slightly swollen, not branched or with few branches; subhymenium hyaline; asci: cylindrical, 8-spored; ascospores: hyaline, 2 locules, ellipsoid, 14-18 µm x 7-10 µm, isthmus 1.5-4 µm, spore end wall thin; Pycnidia: not observed; Spot tests: apothecial margin K+ violet, H+ violet, 10% N+ violet, cN+ violet, C+ violet; thallus K+ violet, H+ violet, 10%N+ violet, cN+ violet, C+ violet; Secondary metabolites: unidentified anthraquinones and thalloidima green.; Substrate and ecology: on non-calcareous or calcareous rocks; World distribution: western North America; Sonoran distribution: southern California and Arizona.; Notes: Caloplaca albovariegata is distinguished by the blue-gray thallus color, the stipitate areoles, thick irregular thallus cortex with algae in clumps, and the thick necral layer. The thallus thickness is somewhat variable and in some cases approaches C. atroalba but that has a thallus cortex with little or no necral layer and a continuous algal layer. In rock depressions C. albovariegata is more stipitate and in some places subsquamulose. Caloplaca peliophylla is similar but that has lighter brown discs and the spore isthmus is narrower. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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