Botourmiaviridae is a family of positive-strand RNA viruses which infect plants and fungi.

Ourmiaviruses are plant viruses that have a bacilliform virion composed of a single capsid protein.

[2] Members of the family Botourmiaviridae have positive-sense, single-stranded RNA genomes.

Contrary to the hosts they infect (plants and fungus), their genome is concise and has few redundancies.

The genomes of these fungal viruses only encode an RNA-dependent RNA polymerase and have no structural proteins.