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Extra resources for A Field Guide to Biological Soil Crusts of Western U.S. Drylands

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Diploschistes diacapsis is a thick, crustose lichen with numerous crater-like, dark gray apothecia. Elevation Lecanora gypsicola has a chinky, crustose thallus, and only 8 large 4,000 spores per ascus. 3,500 3,000 2,500 2,000 1,500 1,000 500 Meters 40 Acarospora schleicheri Common names: Schleicher’s cracked lichen, soil paint lichen Synonym: None Description: Thallus squamulose/areolate, pale to bright sulfur yellow to green, often lobed at the margins, sometimes whitish pruinose. Rhizines lacking.

Fruticulosa 3,000 specimens from Idaho and Utah 2,500 have larger spores (30-20 × 25-15 µm) 2,000 than other fruticose Aspicilia species. 1,500 1,000 500 Meters 45 Aspicilia hispida Common name: Desert vagabond Synonym: Agrestia hispida Description: Thallus fruticose, forming tiny, dull, olive-green to blue-green shrubby clumps up to 3 cm across, irregularly shaped, basally attached, erect, brittle, irregularly to dichotomously branched, with scattered laminal pseudocyphellae. Pseudocyphellae gray-green to yellowish gray.

Comments: Fulgensia bracteata is distributed from high to low elevations, including arctic tundra and cool deserts. In the arid regions it is occasionally found on calcareous soils but becomes quite abundant on gypsiferous soils where it co-dominates with Psora decipiens. Fulgensia species are continuous crustose and yellow, in contrast to the more foliose Caloplaca and Candelariella, which tend to be more orange and are much more fragile and may be discontinuous. The most abundant species of Caloplaca and Candelariella are often lacking apothecia.

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