Brunnera macrophylla (Siberian bugloss, heartleaf) is a species of flowering plant in the family Boraginaceae, native to the Caucasus. It is a hardy, rhizomatous, herbaceous perennial, with basal, simple leaves on slender stems. Sprays of blue flowers, similar to forget-me-nots (a related species), are borne in Spring.
The plant is valued as groundcover in shady areas, with clumps of large heart-shaped leaves all season. Plants are happy in any shady area that stays relatively moist. It often self-seeds, appearing around the garden in other places. Clumps may be easily divided in early fall.
This plant and the variegated cultivars 'Hadspen Cream' and 'Jack Frost' have gained the Royal Horticultural Society's Award of Garden Merit.