Ramalinaceae Bacidina chloroticula (Bacidia chloroticula) Growth type crustose Chemical results negative, epithecium colourless, K- A pioneer species on a wide range of substrates including bricks, stones, tree trunks, wooden fences, dead grass, ironwork and tarmac. Forms small, easily missed patches of thin, scurfy, greyish-green thallus with tiny, often crowded apothecia. The discs are whitish or pinkish-brown with persistent margins. Spores acicular, 0-3 septate, 21-38 x 1-1.8 µm. White, immersed pycnidia, the curved conidia 30-43 x 0.5-1 µm. Micrograph below.

Microscope photograph

Bacidia chloroticula
Broadstone, Dorset. February 2016