ascoma_shape_angular
angular
when unopened, immersed below the bark and a black fungal covering layer; when open, circular or rather angular, 0.5-2 mm diam.; becoming erumpent, throwing back the bark, and breaking the black covering layer by several irregular radial splits to reveal the yellow hymenium in humid conditions (fragments of the bark often remaining attached to the black covering layer, hiding its dark appearance), raising the substratum surface, but lacking a stalk, and so not protruding beyond the level of the dislodged bark covering-layers
Zeus olympius
Zeus olympius