A new virus of the genus Polerovirus in the family Solemoviridae was identified in Bidens Pilosa displaying mosaic and mottle symptoms. Its nearly complete genome of 5,705 nucleotides (nt) contains seven open reading frames (ORFs). The virus shares nucleotide sequence identities 53.2–67.1% with other poleroviruses at whole genome level. The amino acid (aa) sequence identities of each of the five ORFs are less than 84% between the new virus and other known poleroviruses. Phylogenetic analyses showed that the virus was most closely related to beet western yellows virus and cucurbit aphid-borne yellows virus in the genus Polerovirus. Our results suggest that this virus, named “bidens polerovirus 1 (BiPV-1)”, should be a distinct member of the genus Polerovirus. Recombination analysis of the genome sequence of the virus showed that BiPV-1 is a recombinant of the species of two different genera of the family Solemoviridae.