Caloplaca holocarpa sens str Teloschistaceae
Athallia holocarpa sens str. (Caloplaca holocarpa sens str.)

Growth type crustose
Chemical results: K+ crimson

Widespread on dusty siliceous rocks, mortar and concrete. Also found on dusty tree trunks and worked timber.

Thallus yellowish-grey, thin, cracked and areolate or sometimes only visible round the (usually numerous) apothecia. Discs yellow-orange to bright orange, the margins becoming scarcely visible. Asci 8-spored, spores 10-13 x 5.5-7.5 Ám, septum 3.6-5.4 Ám wide. Micrograph below.


Caloplaca holocarpa sens str

Caloplaca holocarpa sens str

Micrograph
Caloplaca holocarpa sens str
Caloplaca holocarpa sens str
Pamphill Green, Dorset. January 2016

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