Caliciaceae Buellia schaereri Growth type crustose Chemical results negative Found on wood and acid-barked trees, particularly conifers and Oak. Thin, greyish thallus with small apothecia, 0.2-0.3(-0.5)mm. Spores are brown, 1-septate, smooth-walled, 6-10(-12) x 2.5-4(-4.5) µm. Pycnidia can be numerous, conidia 2-3 x 1-1.4 µm. Microscope photographs below. Similar: Amandinea punctata. On nutrient-rich bark, larger spores

Microscope photographs



Buellia schaereri
On Oak lignum. Holton Lee and Kingston Lacy, Dorset. December 2012, November 2016