• Cladonia polydactyla (Flörke) Spreng.
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Cladonia polydactyla
© Robert Thompson
Cladonia polydactyla
© Robert Thompson
Cladonia polydactyla
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This is a common red-fruited species of peaty soils and rotting wood. The stout stems (podetia) grow from deeply incised platy squamules and terminate in a shock of narrow tapering branches topped with red discs. In well-developed specimens these narrow branches sometimes expand to form cups with finger-like margins also bearing red discs or smaller, red-tipped pycnidia (like discs in miniature).

Key characteristics

  • In profile this species resembles a standing dead tree (green to grey-green) with its dead branches red-tipped or topped with red discs. The branches are usually scaly below and sorediate above
  • Unlike C. diversa (which is yellow-green) it lacks cups directly above the stems (podetia); it differs from C. floerkeana in its narrow, tapering branches ending in discs or cups and the Pd + orange reaction of the thallus.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Cladonia polydactyla (Flörke) Spreng.. [In] LichenIreland. Accessed on 2018-07-16.