Crassula rupestris 'Pastel'/'Variegated Tom Thumb' has tiny, opposite, triangular leaves in shades of pale green and white with pink edges.

Crassula pyramidalis 'Buddha's Temple' is a stunning succulent with one of the most intriguing leaf patterns we've ever seen.

Crassula Group 5 is a cute little succulent with flattened, bright green leaves with bright red edges.

Crassula 'Ivory Pagoda ' is a small, upright, crassula/succulent with over-lapping, silver leaves and white flowers.

Crassula 'Moonglow' is a cute, upright succulent with very thick, opposite, grey green leaves covered in a fine silvery fuzz..

Crassula 'Pangolin' is a small, upright, rare succulent with over-lapping, powdery grey-green leaves and white flowers.

Crassula 'Spiralis'/'Estagnol' forms small, upright, branched specimens with bright green leaves that spiral around the stems.

Crassula 'Springtime' is a cute, branching succulent with opposite leaves and beautiful clusters of pink flowers.

Crinodendron hookerianum is a dense, evergreen shrub with glossy, leathery leaves; producing captivating red, pendulous flowers.

Crinum amoenum has fragrant, white spidery flowers atop strap-like leaves.

Crinum campanulatum has tropical-looking, fragrant, amaryllis-like flowers that can be white or pink, deepening with age.

Crinum graminicola is a rare species from South Africa with huge umbels of light pink to deep pink flowers and dramatic foliage.

Crinum macowanii is a hardy species with broad, rippled, blue-green foliage and large, highly fragrant, white and pink flowers.

Crinum moorei 'Album' has fragrant, white, amaryllis-like flowers that grace this South African native in early summer.

Crinum moorei 'Album' has fragrant, white, amaryllis-like flowers that grace this South African native in early summer.

Crinum x powellii is an amaryllis relative with strap-like foliage and pink flowers at the height of summer.

Crinum x powellii 'Album' is an amaryllis relative with strap-like foliage and white flowers at the height of summer.

So underused but so beautiful in our summer gardens. Crinum 'Ellen Bosanquet' looks like a lovely pink amaryllis.

Crinum 'Sangria' displays glossy, textured, dark purple, tropical looking foliage is topped in summer with 18 inch spikes of rosy pink, amaryllis-like flowers.

Crinum 'Stars and Stripes' has tropical-looking, lily-like, white flowers with well-defined raspberry stripes down the centre of each petal.

Crocus sativus is the purple, October blooming crocus grown to produce saffron, a luxury spice cultivated since the late Bronze Age.

Crocus ancyrensis 'Golden Bunch' is among the earliest to bloom in the late winter garden with an abundance of orange-yellow flowers.

Crocus angustifolius is known as the "cloth of gold crocus" with golden orangey-yellow flowers with bold purple markings.

Crocus biflorus ssp. weldenii 'Fairy' is a beautiful cultivar with ivory white inner petals and pewter purple outer ones.

Crocus chrysanthus 'Advance' has lovely lemon yellow flowers with a purple flush on the outside.