• Peltigera membranacea (Ach.) Nyl.
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Peltigera membranacea
© Mike Simms
Peltigera membranacea
© Mike Simms
Peltigera membranacea
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Large, leafy ‘dog lichen’, robust, white-frosted above, brown when wet, drying to grey-white, forming lobed, spreading patches over thin grassy lawns, wall tops alongside rivers and streams and fallen trees in damp woodland. Unlike other families of lichens, it attaches like strips of velcro to the substratum. Examination of details of the underside shows an intimate network of white, raised veins and white, whiskery rhizines emanating from these, each one a little bottlebrush in miniature.

Key characteristics

  • Large, robust species (to 10cm across) white-grey frosted above when dry, matt, never glossy or slashed with cracks
  • Underside of white, elevated veins and long, whiskery hairs (rhizines) each like a tiny bottlebrush.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Peltigera membranacea (Ach.) Nyl.. [In] LichenIreland. Accessed on 2018-07-21.