Bartonia virginica (L.) Britton, Sterns & Poggenb.

Bartonia virginica (L.) Britton, Sterns & Poggenb.. Bartonia virginica, also called yellow screwstem or yellow bartonia, is a species of a flowering plant in Gentianaceae. Native to much of eastern North America, B. virginica grows in wetland habitats, especially bogs, wet meadows, and swales. It is an annual species with small pale green to yellow flowers, scale-like leaves, and reduced, hairless roots. Unlike most other species in the gentian family, B. virginica relies on underground fungal partners for many of its nutrients, a strategy known as partial mycoheterotrophy. While it is rare and threatened in some parts of its range, B. virginica is considered a globally secure species.