Fringed Lichen

Upper Surface: K-, prosoplectenchymatous, with or without pruina or cilia
Lower Surface: often decorticate, generally pale, prosoplectenchymatous
Algae: green (trebouxioid)
Reproduction: apothecia, soredia, or isidia
Spores: physcioid (Physconia-type)

Northern temperate.

Common name: Fringe or Millipede Lichens
Family: Physciaceae

Relatively small or narrow-lobed foliose lichens, typically gray to brownish and dull, generally loosely attached to almost fruticose in appearance. Lower cortex lacking or poorly developed.

Bark or wood, rarely rock or soil.

Heterodermia: K+ cortex, thick-walled spores.
Physconia: paraplectenchymatous or scleroplectenchymatous upper cortex, but gen. more closely appressed, and Anaptychia rarely has squarrose rhizines.

Other Physciaceae are more closely appressed, with a well-developed lower cortex.