Placidium squamulosum
DIAGNOSTIC FEATURES: Tiny, brownish thallus-lobes; appressed; embedded perithecia; NIS; always on soil; not crowded and overlapping; lobe edges flat or curled up.
ECOLOGY: Distributed over much of the US, often unnoticed because of its tiny size; two early records from Ohio and several recent collections from Lynx Prairie in Adams County, an abandoned limestone quarry in Marion County Ohio, and the Caesar Creek dam spillway in Warren County; on soil exclusively.