Genus description:Thallus foliicolous, continuous to dispersed, coarsely verrucose, usually whitish to bluish pruinose, with numerous, sterile white setae with short (about 0.1 mm), lateral branches, usually formed on translucent prothallus. Apothecia adnate and spot-like (echinoplacoid); disc orange but often with white, marginal pruina produced by needle-shaped crystals. Excipulum hyphal, colorless. Hypothecium prosoplectenchymatous, colorless. Epithecium yellowish brown, granular. Ascospores usually 8 per ascus, small (usually below 30 μm), muriform but with few septa. Hyphophores formed on the algiferous thallus, setiform, pale yellow. Diahyphae inserted subapically, composed of two types of fliform hyphae, either thick or thin, with the terminal segments of the thin hyphae strongly clavate to spermatozoid.