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Lichen: Peltigera praetextata

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Wet thallus of Peltigera praetextata.

Name: Peltigera praetextata (Flörke ex Sommerf.) ZopfPeltigera praetextata

Pronunciation: Peltigera praetextata

Popular Name: Dog Lichen Body Type: Foliose

Conservation Evaluation: Least Concern

map-peltigeraGeneral Description: The thallus is large, round or irregular, typically 20 cm to 30 cm long. The lobes are narrower than Peltigera membranacea at 1 cm wide (max. at 1.5 cm); the margins are usually upturned, wavy or notched, but can be flat in some specimens. Colour varied, from slate-grey to reddish-brown, particularly at the margins; the reddish colour appears when the specimen is wet.Peltigera praetextata

The lower surface is attached to the substrate centrally and is pale coloured with white or brown veins (check with a 10x hand lens). Rhizines are rather long at 4 mm to 6 mm and simple (not bottle-brush shaped as in P. membranacea).

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 Acarospora fuscata: See Map

Link: Map this species on the Lichen Survey

Other species 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. [29]
  • Peltigera malacea (Ach.) Funck
  • Peltigera membranacea (Ach.) Nyl.
  • Peltigera neckeri Hepp ex Müll.Arg.
  • Peltigera polydactyla (Neck.) Hoffm.
  • Peltigera rufescens (Weiss) Humb.
  • Peltigera venosa (L.) Hoffm.

Text and images © Paul Whelan, 2009.