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Baeomyces rufus
Nomenclature
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Family: BaeomycetaceaeGenus: Baeomyces
SUMMARY
Thallus green to dull grey-green, sometimes brownish, discrete or widespread to 20 cm diam., continuously crustose, nodulose, or of minute overlapping, compacted squamules to 1 mm diam., non-sorediate or with diffuse, coalescing, irregular greenish soralia. Schizidia occasionally present, to 0.3 mm diam., disc-like. Photobiont cells 6-13 (-14) μm diam., globose or a few ellipsoidal.
Anamorph: conidiomata pycnidia, rare. Conidia 4-5 × ca 1 μm.
Teleomorph: ascomata apothecia, to 2 mm diam., almost sessile to stalked (then to 1 cm tall), dark red-brown to pale dull pink-brown, translucent when wet, flattened, often incurved at the base, single or occasionally several together on a short, whitish, furrowed solid stipe, mostly ecorticate, sometimes greenish and corticate towards the base. Hymenium 75-120 μm tall. Interascal tissue of paraphyses , 1.5-2 μm diam. with apical cells to 2.5 μm diam. Asci 60-90 × 7-9 μm. Ascospores (7.5-) 8-11 (-14) × (2.5-) 3-4 (-5) μm, aseptate, hyaline.
Chemistry: thallus C–, K+ yellow, KC+ yellow, Pd+ orange, UV± light creamy yellow (stictic acid with trace of norstictic and one unidentified substance; gyrophoric and lecanoric acids [C+ red] in mature apothecia).