Bartonia paniculata, commonly known as twining screwstem, is a saprophytic, annual or biennial species that grows in acidic, sandy-peaty wetlands.

[3] It is found along the Atlantic coastal plain; its widespread range crosses 29 American states and five Canadian provinces, and overlaps with that of Bartonia virginica.

[2] Twining screwstem is legally protected in the state of Michigan as a threatened species.

[6] It is found within the baygalls of the coastal plain forests of southeastern Texas.

As the baygalls have become rarer as a plant community, the texana subpopulation has also declined.