Prior to 2011, the last record of the forked bluecurls (Trichostema dichotomum Linnaeus) in Québec was of a specimen collected in the Baie Missisquoi area in 1952. In 2011, this species was discovered growing at 3 sites around Cazaville, in the municipality of Saint-Anicet (regional county municipality (RCM) of Le Haut-Saint-Laurent). In 2013, it was found growing at a further 2 sites around Cazaville and at 1 site in Saint-Chrysostome, which is located within the same RCM. This paper describes the morphological characteristics of the species, its distribution in North America, the habitats in which it occurs, companion plants and additional data associated with the Québec population. The importance of habitat conservation, particularly in the Cazaville area, is also discussed.