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Icmadophila ericetorum
Nomenclature
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Family: IcmadophilaceaeGenus: Icmadophila
SUMMARY
Thallus crustose, rather soft, of compacted, irregular, soredium-like granules 100-300 μm, forming a continuous, very uneven crust; pale green, blue-green or whitish-grey. Photobiont Coccomyxa, the cells 6-10 × 3.5-5 μm, ellipsoidal.
Anamorph: conidiomata pycnidia, immersed, with hyaline walls. Conidia 3.5-4 x 0.5-1 µm in size, bacilliform, hyaline, aseptate.
Teleomorph: ascomata apothecia, to 2 (-3) mm diam., usually abundant, a striking pink or pale orange-pink, the margin (true exciple) thin or excluded, paler or concolorous with the disc, even, smooth or irregularly crenulate or nodulose. Disc smooth or corrugate-wrinkled, sometimes faintly pruinose. Epithecium red-brown, densely packed with minute crystals, K+ orange, dissolving. Hymenium 120-140 μm tall. Hypothecium hyaline, the central part of interwoven hyphae with scattered, interspersed clusters of coarse crystals, K– not dissolving. Interascal tissue of unbranched or sparingly branched paraphyses ca 1 μm diam., the apices swollen, to 5 μm diam. Asci cylindrical, K/I– except for a thin dark blue cap in the apical wall, (6-) 8-spored. Ascospores 13-27 × 4-6 μm, fusiform to ellipsoidal, (0-) 1- (to 3-) septate, hyaline, thin-walled, smooth, without an epispore or gelatinous sheath.
Chemistry: thallus C–, K+ orange, KC+ orange, Pd+ orange, UV+ glaucous (apothecia UV–) (thamnolic, perlatolic acids; thamnolic acid only in the apothecia).