Irish lichens

Caloplaca flavocitrina

Order: Teloschistales       Family: Teloschistaceae

Species: Flavoplaca flavocitrina (Caloplaca flavocitrina)

Growth type crustose. Identification cofirmed by J Douglass
Photos: On Thrift (Armeria maritima). Allihies, Co. Cork, SW Ireland.

Thallus of small yellow-orange, flat or flexose areoles, the margins with paler soredia that can cover much of thallus. Apothecia are frequent, the discs darker than the thallus, margins rarely sorediate. Spores 9-13(-14) x 4.5-7(-8) Ám, septum 2.5-4 Ám.
K+ red-purple.

Saxicolous and corticolous but possibly under-recorded. Occurs throughout Ireland on calcareous rocks, limestone, mortar, cement and on base-rich bark.

Caloplaca flavocitrina
Caloplaca flavocitrina March 2012

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