When I’ve searched Ash keys (seed pods) previously for fungi, I’ve found the two most common, which are Diaporthe samaricola (the small black dots on the upper, seed portion of the ash key, in the image on the right below) and Neosetophoma samarorum (the much smaller, black speckles on the lower, wing part of the key, in the same image) (see Ash key fungi, January 2021).

During recent checks, however, I found a third fungus, the three all flourishing quite happily side by side on one set of keys. The third fungus is white, slightly woolly and minute, and it might be something like Flagelloscypha minutissima, but without examining it and its spores under a microscope (which I don’t have) I can’t be sure.