The family Brachybasidiaceae, in the order Exobasidiales, is a group of fungi primarily known as plant pathogens. Members of this family are obligate parasites that typically infect the leaves, stems, or flowers of various host plants, often causing gall-like swellings, deformities, or leaf distortions. They produce basidiospores on specialized structures called basidia, which are often formed on the surface of the infected plant tissue. Brachybasidiaceae species are mostly found in temperate and tropical regions, and their life cycles are closely tied to their host plants. Ecologically, they play a role in regulating host plant populations, though they are generally considered of minor economic importance compared to more aggressive plant pathogens.