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Lichen: Peltigera membranacea

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Peltigera membranacea Peltigera membranacea underside showing rhizines

Name: Peltigera membranacea (Ach.) Nyl.

Pronunciation: Peltigera membranacea

Conservation Evaluation: Least Concern

Popular Name: Membrane Dog Lichen Body Type: Foliose

General Description: Thallus may be 25 cm in length, but typically it falls in the range 15 cm to 20 cm long. The lobes range from 1 cm to 4 cm wide and are very thin. Typically brown when moist and turning silver-grey when dry, often shiny, especially towards the centre with a veined or undulating texture. The underside is whitish to light brown with bottle-brush shaped rhizines. Loosely attached to the substrate. Apothecia are common, round in shape with reddish brown discs. Chemical tests do not apply because of their lack of lichen substances. Distinguished by the undulating or veined upper thallus. Spores 3 to 5 septate, colourless or pale brown.


Chemical Tests: None. No lichen substances.

Nature Notes: Frequently associated with mosses that help to keep them damp and hence metabolically active. Occur on rocks and trees.

Vice County distribution map of Peltigera membranacea: See Map

Link: Map this species on the Lichen Survey

Other Peltigera Recorded in Ireland

  • Peltigera britannica (Gyeln.) Holt.-Hartw. & Tønsberg
  • Peltigera canina (L.) Willd.
  • Peltigera collina (Ach.) Schrad.
  • Peltigera degenii Gyeln.
  • Peltigera didactyla (With.) J.R.Laundon
  • Peltigera horizontalis (Huds.) Baumg.
  • Peltigera hymenina (Ach.) Delise ex Duby
  • Peltigera leucophlebia (Nyl.) Gyeln.
  • Peltigera malacea (Ach.) Funck
  • Peltigera neckeri Hepp ex Müll.Arg.
  • Peltigera polydactyla (Neck.) Hoffm.
  • Peltigera praetextata (Flörke ex Sommerf.) Zopf
  • Peltigera rufescens (Weiss) Humb.
  • Peltigera venosa (L.) Hoffm.

Text and images © Paul Whelan, 2009.