South America: Brazil, Agentina, Bolivia, Paraguay, Uruguay.
Annual or biennial (also listed as perennial) herb in Verbenaceae, 5-150cm tall and up to same dimension wide. Few-branched, erect stems with opposite leaves, white to purple flowers along tall inflorescence spikes.
Some taxonomic confusion with this species, as V. brasiliensis has been misapplied to this species (per GRIN: https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=408616 )
Yes, listed in Western Sunset Garden Book.