Asteraceae/Compositae: an upright perennial to 2.5m. Found in rich woods, thickets, river banks and prairies. Loose clusters of yellow, daisy-like flowers 7-9cm wide, blooming around July-September. Paired, oval leaves joined around the stem, aromatic when bruised. Native to Eastern North America - Ontario to South Dakota, south to Georgia, Missouri and Oklahoma.
Cup plant was employed medicinally by several native North American Indian tribes who used it to treat a variety of complaints. It is little, if at all, used in modern herbalism. A decoction of the root has been used to treat the stoppage of periods, and to treat morning sickness and to prevent the premature birth of a child. The root has alterative, antispasmodic, diaphoretic, emmenagogue, febrifuge, hepatic, stimulant, styptic and tonic properties.
These seeds germinate rapidly depending on species and origin. If germination does not occur after 3–4 weeks a cooling period of 2–4 weeks is recommended.
Succeeds in any ordinary garden soil. Preferring a deep moisture retentive moderately fertile soil that is not too nitrogen rich, in sun or dappled shade. Hardy to at least -25°C. Plants have a deep and extensive root system which makes transplanting difficult. An aromatic resin exudes from the crushed leaves and stems. Attracts birds and butterflies.