Caliciopsis

Caliciopsis is a genus of fungi in the family Coryneliaceae. It consists of 28 species. These fungi grow as parasites or decomposers on bark, twigs, and leaves of trees, with each species typically restricted to a single host plant. They produce tiny, dark, stalked fruiting bodies that release powdery masses of ascospores from their tips. The genus is found worldwide on both conifers and broad-leaved trees, though many species remain poorly documented due to their small size and hidden growth in bark crevices. One species, which infects dwarf mistletoe species on pines, has been studied as a potential biological control agent....read more on Wikipedia.