Alectoria Ach.


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 25—50 μ, usually 2-4 spored. Spores simple, ellipsoid, thick-walled, brown, 23—48 x 12—28 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.


  1. Alectoria brodoana Essl.
  2. Alectoria catharinae Räsänen
  3. Alectoria fallacina Motyka
  4. Alectoria fusconitida I.M. Lamb ex Motyka
  5. Alectoria imshaugii Brodo & D. Hawksw.
  6. Alectoria lata (Taylor) Linds.
  7. Alectoria ochroleuca (Hoffm.) A. Massal.
  8. Alectoria sarmentosa (Ach.) Ach.
  9. Alectoria sorediosa (Lång ex Räsänen) McMullin & Lendemer
  10. Alectoria vancouverensis (Gyeln.) Gyeln. ex Brodo & D. Hawksw.
  11. Alectoria vexillifera (Nyl.) Stizenb.