You are here
Family: PeltigeraceaeGenus: Ricasolia
Thallus to 10 cm diam., ± closely appressed, often forming rosettes; lobes 3-10 mm wide, rounded at apices, indented, wavy, occasionally with marginal folioles, often overlapping and becoming imbricate towards centre; upper surface pale grey-brown to grey-green when dry, green when wet, often smooth and shiny, more rarely becoming transversely wrinkled and ridged in older parts; lower surface pale brownish white, evenly tomentose without tomentum-free, naked patches; photobiont green algae but with scattered internal cephalodia in the medulla.
Anamorph: conidiomata pycnidia, frequent, ostiole dark brown; conidia widening at both ends, 4-5 × 1.5 μm.
Teleomorph: ascomata apothecia, frequent, disc 1-3 mm diam., pink- or orange-red with thick, inflexed thalline exciple. Ascospores 25-45 × 8-11 μm, colourless or pale brown, fusiform, 1(-3)-septate.
Chemistry: medulla C–, K+ pale yellow or K–, KC± pink, Pd–, No secondary substances identified.