Diploicia canescens Physciaceae
Diploicia canescens

Growth type placodioid (crustose with lobed margins).
Chemical tests: K+ yellow, C-, KC+ yellow, P-, UV- or UV+ orange

Occurs on both basic and nutrient-rich walls, rocks, headstones and trees.

White or pale bluish-grey thallus with white-pruinose marginal lobes. Centre covered with patches of yellowish soralia becoming eroded with age. Apothecia more frequent in coastal areas, pycnidia sometimes on lobes of fertile specimens. Spores brown, 1-septate, 10-15 x 5-8 Ám.
Microscope photograph below.
Occasionally host to Arthonia diploiciae #

Similar: Solenopsora candicans. Usually fertile, K-, P+ orange


Diploicia canescens

Diploicia canescens

Diploicia canescens

Diploicia canescens

Microscope photograph
Diploicia canescens, spores
Diploicia canescens
Studland and Kimmeridge churchyards and Holton Lee, Dorset. October 2012 and January 2013

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