This grower is fairly sure of this plant identification.
Doronicum are rhizomatous or tuberous-rooted herbaceous perennials with heart-shaped basal leaves and bright yellow daisy-like flower-heads adored by butterflies.
Doronicum orientale ‘Magnificum’ (Leopard's bane). Produces yellow, large, single, disc-shaped flowers in early spring with medium green, heart-shaped leaves.
They are fully hardy and will grows in full light or shade in any well drained soil.
Grown for their daisy like flower heads that are good for cutting.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record