pelargonium flower break virus pelargonium flower break virus pelargonium flower break virus (pfbv) is a plant pathogenic virus of the family tombusviridae. pelargonium flower break virus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: kitrinoviricota class: tolucaviricetes order: tolivirales family: tombusviridae genus: alphacarmovirus species: pelargonium flower break virus