Caliciaceae Diplotomma hedinii Growth type crustose. BLS conservation evaluation: LC NS Chemical results negative. Scattered but local distribution on calcareous rocks Very similar to Diplotomma alboatrum but the thallus can sometimes be pale brownish rather than white. The prothallus is usually absent or inconspicuous but thin and greyish at the junction of different colonies. Spores are 3-septate, 14-21 x 6-11 µm, do not become muriform, and are more frequently curved. Micrographs below. Similar: Diplotomma alboatrum, spores becoming sub-muriform

Microscope photographs



Diplotomma hedinii
Wimborne, Dorset. February 2017