Irish lichens

Peltigera horizontalis

Order: Peltigerales       Family: Peltigeraceae

Species: Peltigera horizontalis

Growth type foliose.
Photos: Killarney National Park, Co. Kerry, SW Ireland.
Identified by John Douglass

Can form large patches. Lobes +/- glossy, blue-grey, often tinged brown. Lower surface white becoming darker towards centre. Conspicuous dark brown-black veins with white interstices. Rope-like dark rhizines. Apothecia red-brown, rounded, sometimes broader than long, held +/- horizontally on lobes.

'Old woodland' indicator species found on mossy tree trunks and rocks, rotting logs and stumps. Chemical reactions negative.


Peltigera horizontalis


Peltigera horizontalis


Peltigera horizontalis
Peltigera horizontalis November 2009

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