Placidium squamulosum Verrucariaceae
Placidium squamulosum (Catapyrenium squamulosum)

Growth type squamulose
Chemical results negative

Found on calcareous soils, sand and humus and sometimes associated with cyanobacterial crusts.

Thick pale to dark brown, irregularly shaped squamules (2-7 mm diameter) attached to the substrate by hyaline to dark brown rhizoidal hyphae. Perithecia completely immersed with only the dark ostioles visible. The asci are 8-spored, spores simple, 12-16 x 5.5-7.5 Ám. Micrograph below.

Similar: Romjularia lurida

Placidium squamulosum

Placidium squamulosum

Microscope photograph
Placidium squamulosum
Placidium squamulosum
Ulwell Gap, Dorset. January 2016

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