Coreopsis verticillata
A bushy perennial with narrow, finely dissected leaves, and yellow, daisy-like, flowerheads.
Coreopsis verticillata ‘Grandiflora’
A bushy perennial with narrow, finely dissected leaves, and dark yellow, daisy-like, flowerheads.
Coreopsis verticillata ‘Moonbeam’
A bushy perennial with narrow, finely dissected leaves, and lemon-yellow, daisy-like, flowerheads.
Coreopsis verticillata ‘Zagreb’
A bushy perennial with narrow, finely dissected leaves, and golden yellow, daisy-like, flowerheads. Drought resistant.
Cornus canadensis
A creeping perennial with mid-green leaves. Green flowers are surrounded by white, sometimes pink flushed bracts, followed by fleshy red fruits.
Cortusa matthioli
A clump-forming perennial with hairy deep green leaves. Pendent bell-shaped magenta-pink or purple-violet flowers. Needs a cool position.
Corydalis cashmeriana
A tufted perennial with bright green divided leaves and dense racemes of bright blue flowers, with curved spurs. Prefers a cool moist position.
Corydalis cheilanthifolia
An evergreen perennial with light to mid-green fern-like leaves and dense spike-like racemes of deep yellow flowers, with straight spurs. Self-seeds.
Corydalis elata
An erect perennial with light green divided leaves and dense racemes of scented deep blue flowers. Prefers a cool moist position.
Corydalis flexuosa
An erect perennial with light green divided leaves and dense racemes of bright, slender tubed, blue flowers. Prefers a cool moist position. Summer dormant.
Corydalis flexuosa ‘China Blue’
An erect perennial with bronze tinted filigree green leaves and dense racemes of bright, slender tubed, wedgewood blue flowers. Prefers a cool moist position. Summer dormant.
Corydalis flexuosa ‘Père David’
An erect perennial with light green divided leaves and dense racemes of slender tubed, electric blue flowers. Prefers a cool moist position. Summer dormant.