Known in cultivation as ‘Silver Princess’ it prefers a dry summer and well-drained soils. The flowers are large (up to 50 mm in diameter) and normally pink to red but white flowered plants are known.
Genus: From Greek, eu, well and calyptos, covered referring to the cap which covers the developing flowers.
Species: From Latin, caesius, light grey, referring to the greyish appearance of the buds, fruit and stems.