Type species: Alectoria sarmentosa (Ach.) Ach.
Statistics: A fruticose lichen genus with 7 species.
Description: Lichens. Thallus fruticose, erect, pendent or prostrate, greenish yellow to rarely greenish grey, apical parts often blackened, branches terete or ?attened; pseudocyphellae abundant, conspicuous, raised, elongate fusiform to ovoid, white. Soralia absent or rare, tuberculate. Isidia absent; cortex composed of periclinally arranged prosoplectenchymatous hyphae. Ascomata apothecia, distinctly zeorine, same colour as the thallus; paraphyses frequently branched; asci clavate, 65-130 x 2550 μ, usually 2-4 spored. Spores simple, ellipsoid, thick-walled, brown, 2348 x 1228 μ, epispore colourless. Condiomata pycnidia, globose, immersed, common to scattered. Conidia bacillifonn to fusiform.
Photobiont: Trebouxia.
Chemistry: Cortex with usnic acid. Medulla with alectoronic, diffractaic, squamatic acid.