Cassiope mertensiana
Pretty bell-shaped pure white flowers on slender stems
Cassiope mertensiana var. gracilis
Pretty bell-shaped white flowers (large than the type) on slender stem
Cassiope tetragona
Pretty nodding bell-shaped white flowers on slender stems
Castanea sativa
Vigorous large tree with spirally furrowed bark when old. Toothed, glossy dark green leaves. Laden with yellowish green catkins in summer. Edible fruit in autumn.
Castanea sativa ‘Albomarginata’
Vigorous large tree with spirally furrowed bark when old. Toothed, glossy dark green leaves, margined creamy white. Laden with yellowish green catkins in summer. Edible fruit in autumn.
Catalpa bignonioides
Spreading tree with broad heart-shaped large green leaves. Flowers are white, marked yellow and purple-brown on upright panicles followed by slender seed pods.
Catalpa bignonioides ‘Aurea’
Spreading tree with broad heart-shaped large yellow leaves bronze when young. Flowers are white, marked yellow and purple-brown on upright panicles followed by slender seed pods.
Catalpa x erubescens ‘Purpurea’
Spreading tree with large broad leaves blackish purple when young, maturing green. Flowers are white, marked yellow and purple on upright panicles followed by slender seed pods.
Catananche caerulea
A short-lived perennial with clumps of grass-like, hairy green leaves. Single lilac-blue flowers with dark centres.
Catananche caerulea ‘Alba’
A short-lived perennial with clumps of grass-like, hairy green leaves. Single white flowers.
Catananche caerulea ‘Bicolor’
A short-lived perennial with clumps of grass-like, hairy green leaves. Pretty white flowers with purple centres.
Catharanthus roseus
An excellent free flowering houseplant