Part of the aster family, there are more than 200 species of bidens plants worldwide with native types in such farflung places as Hawaii, Mexico, and Europe. In the United States, these plants are considered a native species in every state except Wyoming.
These flowering plants typically have blooms in yellow or orange blossoms. In warmer climates where winter temperatures stay above 40 degrees Fahrenheit, bidens are a perennial plant. Though they lose their blooms in late fall and winter, the beautiful foliage of this plant stays green all year long. In northern climates where winter temperatures fall below freezing, they are considered an annual and need to be replanted each year.