Flavignomonia is distinguished from Synnemasporella by the orange tips of its synnemata.

Flavignomonia rhoigena C.M. Tian & Q. Yang

The generic name is derived from the colour of synnemata (flavus = yellow) and the genus name Gnomonia.

Sexual morph: not observed. Asexual morph: Conidiomata synnematal. Synnemata long and determinate, growing from host tissue, with brown base and orange tip, straight to curved, parallel, with flat to slightly concave and dark zone of conidiogenous cells and host tissue at their bases. Conidiophores reduced to conidiogenous cells. Conidiogenous cells phialidic, aggregated, hyaline, straight to curved, cylindrical, arranged adjacent to one another at the end of the synnema, producing a single conidium. Conidia cylindrical to oblong, smooth, multiguttulate, hyaline.

Flavignomonia is included in Gnomoniaceae based on DNA sequences data. Flavignomonia is morphologically similar to Synnemasporella in forming synnemata (Wehmeyer 1933, Fan et al. 2018). However, Flavignomonia, typified with Flavignomonia rhoigena, is distinguished from Synnemasporella species by its orange synnematal tips and hyaline conidia (Fan et al. 2018).