Chionanthus virginicus, known as the fringe tree, is a unique shrub or small tree with unique fragrant white flowers.

Chionodoxa luciliae 'Alba', glory-of-the-snow, is one of the first bulbs to bloom in spring with its pure white flowers.

Chloranthus japonicus is an unusual and rare shade perennial with cool foliage and feathery white flowers like "electrocuted pipe cleaners".

Chloranthus serratus is an unusual and rare shade perennial with cool foliage topped with two little spikes white flowers.

Choisya 'Bluestone' is a Cistus Nursery introduction with finely textured, linear leaflets in shades of greenish blue.

Choisya 'Goldstone' is a Cistus Nursery introduction with finely textured, linear leaflets in shades gold and lime green.

Chrysosplenium macrophyllum is a rare groundcover with leathery leaves, burgundy when young, and fragrant clusters of white flowers.

Cistus x hybridus Little Miss Sunshine forms mounds gold variegated leaves topped with pure white, rose-like flowers in summer.

'Mickie' rock rose forms a mound of gold and green evergreen foliage topped with white flowers in early summer.

Citrumelo (xCitroncirus) is a cross between a grapefruit and the very hardy trifoliate orange (Poncirus trifoliata) and tastes like something between the two. It is hardy outdoors on the west coast.

Citrus (formerly Microcitrus) australasica, the Australian finger lime, is a lime relative from Australia and a top citrus for foodies.

Citrus (formerly Microcitrus) australasica, the Australian finger lime, is a lime relative from Australia and a top citrus for foodies.

Citrus australasica Red Skin can have fruit with skin with a reddish cast hiding the tasty, clear lime caviar within.

Citrus bergamia, or bergamot, resembles an orange in shape, but is green or yellow like a lemon.

Citrofortunella mitis is a small, beautiful shrub with large crops of fruit known as calamondin or calamansi in Philippine cuisine.

Citrofortunella mitis is a small, beautiful shrub with large crops of fruit known as calamondin or calamansi in Philippine cuisine.

Citrofortunella mitis ‘Variegata’ has variegated foliage, fragrant white flowers, and large crops of variegated fruit.

Citrofortunella mitis ‘Variegata’ has variegated foliage, fragrant white flowers, and large crops of variegated fruit.