Cultivar
'Miss Mason'
This herbaceous perennial grows to 600 mm (2 ft) tall by 300 mm (1 ft) wide with dark green heart-shaped leaves and forms a clump. From spring to early summer it produces large flat bright yellow daisy-like flowers are up to 80 mm (3⅛ in) wide that stand erect on a stem up to 600 mm (2 ft) tall. It is commonly planted in herbaceous borders. It prefers a semi-shaded to full sun protected position and grows in most well-drained fertile moist loams in USDA zones 5-9.