Pseudofumaria Lutea

Yellow corydalis, Pseudofumaria lutea, forms a soft evergreen mound of finely divided, fern-like foliage and produces loose clusters of slender bright yellow, spurred flowers from late spring well into autumn. Native to the southern Alps but widely naturalised on old walls, steps and shaded masonry, it thrives in cool crevices where the roots remain moist yet drained. The plant seeds itself readily into gaps without forming heavy ground cover, bringing months of colour to awkward shaded places. Bees visit the flowers, while ants help disperse the small seed.