Irish lichens

Polychidium dendriscum

Order: Peltigerales       Family: Placynthiaceae

Species: Polychidium dendriscum

Growth type fruticose.
Photos: Glengarriff woods, Co. Cork, SW Ireland.
Identified by Andy Acton

Cushion-forming minute, interwoven blue-green, blue-grey or brownish filaments, greyer when dry. Filaments smooth or +/- nodulose with single-layered cortex. Photobiont Scytonema. Pycnidia occasional, apothecia are unknown in Britain and Ireland.

Occurs among moss and liverworts on shaded tree trunks in undisturbed boggy woodlands. Rare, mainly SW Ireland.

Similar: Polychidium muscicola


Polychidium dendriscum


Polychidium dendriscum
Polychidium dendriscum April 2010

All images used are copyright. Please contact me if you find errors.