Clematis 'John Warren' offers stunning large white flowers with central bands and edges of carmine pink around red stamens.

Clematis 'Louise Rowe' offers lovely single and double flowers in softest mauve and pink.

Clematis 'Miss Bateman' is an heirloom with gorgeous creamy white flowers with pale green central bands.

Clematis 'Mme Le Coultre' has been a classic for more than 100 years with its pure white flowers and yellow stamens.

Clematis 'Moonlight' produces creamy white flowers embossed with yellow stamens and a palest yellow midrib.

Clematis 'Pernille' is a cold-hardy climber with single white flowers, purple margins and veining and yellow stamens.

Clematis 'Snow Queen' is an introduction from New Zealand with lovely white flowers.

Clematis 'The First Lady' offers very large flowers in silvery blue to white with light greenish bands and pretty purple stamens.

Clematis 'Toki' is an elegant Japanese cultivar with pure white 5-7 inch wide flowers and yellow stamens.

Clematis Vancouver 'Fragant Star' has a vanilla fragrance that is quite unique for a large, white flowered clematis.

Clematis Vancouver 'Morning Mist' has large soft pink flowers with a frilled pink edge and striking yellow stamens.

Clematis 'Veronica's Choice' is a stunning confection with fully double flowers of white, French gray, and palest blue.

Clethra alnifolia 'Hummingbird' is a compact shrub with white bottlebrush flowers that are fragrant and nectar-rich.

Clethra alnifolia 'Summer Sparkler' is a compact shrub with long, twisting racemes of white flowers that are fragrant and nectar-rich.

Clintonia umbellulata has rich green, glossy foliage topped with a cluster of pure white flowers followed by black berries.

Colchicum autumnale 'Alboplenum' is one of the most beautiful of the autumn crocus with pure white double-petaled flowers.

Colchicum autumnale 'Album' is a vigorous cultivar with vase-shaped, snow white flowers produced in profusion.

Colchicum byzantinum 'Innocence' is a beautiful autumn crocus with large white petals flushed with pink.

Colchicum 'Harlekijn' is a unique autumn crocus producing multiple bicolour flowers in white and pinkish purple.

Conophytum minimum 'Wittebergense' is a darling living pebble forming roundish, succulent heads with bold dark spotting.

Conophytum scitilum is a cute living pebble forming roundish, succulent heads with bold dark lines against a blue-grey background.

Conophytum vanzylii is a living pebble with nearly perfectly round bluish green spheres with a small cleft like red lips.

Convallaria 'Albostriata' is a special form of lily-of-the-valley with green leaves striped with yellow.

Convallaria majalis 'Bordeaux' is an improved version of the old-fashioned lily-of-the-valley with larger and more plentiful flowers.