Variation
var. albus
This plant is simular to the species but produces white flowers.

Cultivars
'Annie Hall'
This plant has rounded green or variegated foliage and produces purple-pink flowers.

'Coccineus Minor'
This plant has crimson-pink flowers.

'Pink Ripple'
This plant has bronze-pink flowers.

'Snow Drift'
This plant has white flowers.

All of these cultivars have the same environmental requirements as the species.