Calluna vulgaris ‘Winter Chocolate’
Compact bushy evergreen shrub with green foliage turning dark orange, and attractive pale lavender flowers.
Calocedrus decurrens
Large tree with a narrow conical shape, leaves with fan-like sprays of narrow dark green leaves. Erect yellow-brown cones turning to red-brown.
Calocedrus decurrens ‘Aureovariegata’
Large tree with a narrow conical shape, leaves with fan-like sprays of narrow dark green leaves and sprays of golden leaves throughout the branches. Erect yellow-brown cones turning to red-brown.
Caltha palustris
Marginal aquatic perennial with kidney-shaped dark green leaves. Bears waxy, buttercup-like yellow flowers.
Caltha palustris var. alba
Marginal aquatic perennial with kidney-shaped, glossy, dark green leaves. Bears waxy, buttercup-like white flowers.
Caltha palustris var. palustris
Marginal aquatic perennial with rounded, heart-shaped dark green leaves. Bears waxy, buttercup-like yellow flowers.
Caltha palustris var. radicans ‘Flore Pleno’
Marginal aquatic perennial with kidney-shaped dark green leaves. Attractive waxy, double yellow flowers.
Calycanthus floridus
Bushy spreading shrub with dark green leaves, sometimes turning yellow in autumn. Pretty flowers with strap-like dark red petals fading to brown at the tips.
Calystegia hederacea ‘Flore Pleno’
Twining climber with arrow-shaped green leaves and attractive large flesh coloured double flowers with densely set, ruffled petals. Can be grown in a tub to restrict its wandering roots.
Camassia cusickii
Bulbous perennial with wavy-margined narrow leaves. Shallowly cup-shaped deep steel blue flower spikes.
Camassia leichtlinii
Bulbous perennial with wavy-margined narrow leaves. Star-shaped creamy white flower spikes.
Camassia leichtlinii ssp. leichtlinii
Bulbous perennial with wavy-margined narrow leaves. Star-shaped cream flower spikes.