Phialophora is a form genus of fungus with short conidiophores, sometimes reduced to phialides; their conidia are unicellular. They may be parasites (including on humans), or saprophytic (including on apples). Genetic analysis of Phialophora shows that it is a paraphyletic grouping. The conidia are produced from a flask shaped phialide. Mature, spherical, to oval conidia are extruded from phialides and usually accumulate around it.