Eupatorium quaternum, commonly known as Boneset, is a deciduous perennial herb native to eastern North America, particularly in wetlands and moist areas such as marshes, meadows, and along streams. This plant typically grows to a height of 3-7 feet (0.9-2.1 meters) and a width of up to 1 foot (0.3 meters). Boneset has a clumping form with upright stems and bears clusters of small, fluffy, white flowers from late summer to fall, which are highly attractive to butterflies and other pollinators.

Boneset is valued for its medicinal properties, as it has been traditionally used to treat fevers and other ailments. Its flowers provide a late-season nectar source for pollinators. It is commonly used in naturalistic plantings, rain gardens, and as a component of wildlife gardens due to its adaptability to wet conditions. In cultivation, Boneset prefers full sun to part shade and requires consistent moisture, thriving in soils with medium to wet drainage. While generally low-maintenance, it can be susceptible to powdery mildew if airflow is poor. It is not typically invasive but can spread by rhizomes to form colonies if conditions are favorable.CC BY-SA 4.0