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Ramalina farinacea
Nomenclature
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Family: RamalinaceaeGenus: Ramalina
SUMMARY
Thallus 3-6 (-10) cm long, tufted, pendent, arising from a strictly delimited holdfast, often subdivided into numerous flattened and occasionally slightly concave branches to 3 mm wide, yellow- to dark grey-green; surface matt, smooth; texture firm; medulla solid, subcortex cartilaginous. Soralia numerous, marginal, discrete, circular to elliptical, saucer-shaped, becoming flat. Soredia 20-30 μm diam., pale yellow-green, farinose.
Anamorph: no information available.
Teleomorph: ascomata apothecia, rare, lateral. Ascospores 8-15 × 5-7 μm, broadly ellipsoidal.
Chemistry: four chemotypes, all with usnic acid in medulla and soralia: (a) K– or orange-brown, Pd+ orange-red, UV– (protocetraric acid); (b) K+ yellow-red, Pd+ yellow-orange, UV– (salazinic acid, ± norstictic acids); (c) K–, Pd–,UV+ blue-white (hypoprotocetraric acid); (d) K–, Pd–, UV– (lichen products not detected).