Verrucaria ochrostoma Verrucariaceae
Verrucaria ochrostoma

Growth type crustose. BLS conservation evaluation: DD NR
Chemical results negative

Widespread on limestone, mortar and plaster but overlooked until recently

Superficial thallus composed of pale grey to grey-brown, more/less convex and mostly crowded areoles that form a cracked crust. Perithecia are immersed in the thallus, one in each areole with only the blackish-brown apex visible, involucrellum absent. Spores 16-26 x 9-13 Ám, sometimes developing a septum. Microscope photograph below.


Verrucaria ochrostoma

Verrucaria ochrostoma

Verrucaria ochrostoma

Verrucaria ochrostoma

Verrucaria ochrostoma

Microscope photograph
Verrucaria ochrostoma
Verrucaria ochrostoma
Wimborne Minster, Dorset. March 2017

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