Irish lichens

Opegrapha multipuncta

Family: Porinaceae

Species: Porina multipuncta (Opegrapha multipuncta)

Growth type crustose
Photos: On Sycamore twig. Knocknagree, Co. Cork, SW Ireland.
Identified by John Douglass

Thin smooth or scurfy brownish thallus with numerous patches of fleck-like or concave soralia that are initially orange but fade to yellowish-grey. Apothecia and pycnidia are absent. Chemical reactions negative.

Can be locally frequent on small branches of deciduous trees in damp, boggy sites. Also recorded from shaded rocks in NW Britain.

Similar: In O. sorediifera and O. gyrocarpa soralia are C+ red

Opegrapha multipuncta
Opegrapha multipuncta . April 2012

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