Caloplaca granulosa Teloschistaceae
Caloplaca granulosa

Growth type placodioid
Chemical results: K+ crimson

A rare coastal species on sheltered, sunny limestone rocks and walls.
BLS conservation evaluation: NT NR

The yellowy-orange placodioid thallus is closely pressed to the substrate and has abundant finger-like isidia that often obscure the centre of the thallus. Scattered apothecia (to 1mm diam), the spores 11-13 x 7-9 Ám, septum 3-6 Ám wide (1/4 to 1/2 length of the spore)

Similar: C. verruculifera. Larger, greenish-yellow with flattened isidia


Caloplaca granulosa

Caloplaca granulosa
Caloplaca granulosa
On limestone, Portland, Dorset. February 2016

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