ascoma_position_close
closed
roughly 1-4 mm diam.; circular or elliptical to irregular when viewed from above; at first closed, with a black shiny surface and entirely covered by the leaf cuticle which remains in place; gradually and eventually markedly raising the surface of the leaf; later opening by one longitudinal split or various irregular splits, or by a circular split around the earlier location of a conidioma; the covering layer then folding back in humid conditions and revealing the greyish disc
Placuntium andromedae
Placuntium andromedae