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Lichen: Peltigera collina

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Name: Peltigera collina (Ach.) Schrad.

Peltigera collina showing the undulating edges of the lobes.

Peltigera collina showing the undulating edges of the lobes.

Peltigera collina

Peltigera collina

Pronunciation: Peltigera collina

Conservation Evaluation: Least Concern Body Type: Foliose

Description: Like many of the Peltigera genus, this is a large lichen with lobes 1 cm to 2 cm and radiating from a central point to a distance of 10 cm. The upper surface colours may be described as grey to blue-grey to brown with a smooth texture. The underside is pale brown with simple non-branched rhizines. Lobes are closely pressed to the substrate, except at the edges where the margins are raised and wavy or undulating; frequently it is pruinose with marginal soralia. Apothecia are rare and very small reaching a maximum size of 2 mm. Ascospores are 3 to 5 septate and 70 µm by 5 µm.

Chemical Tests: All negative. No lichen substances.

Nature Notes: Found on mossy rocks and tree trunks. This is the only Peltigera with marginal soralia and can be confused with Nephroma parile.

Vice County distribution map of Acarospora fuscata: See Map

Link: Map this species on the Lichen Survey

Peltigera species recorded in Ireland

  • Peltigera britannica (Gyeln.) Holt.-Hartw. & Tønsberg [28]
  • Peltigera canina (L.) Willd.
  • 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 praetextata (Flörke ex Sommerf.) Zopf
  • Peltigera rufescens (Weiss) Humb.
  • Peltigera venosa (L.) Hoffm.

Text and images © Paul Whelan, 2009