Begonia can be annuals, evergreen or deciduous perennials or shrubs, with fibrous, tuberous or rhizomatous roots and usually asymmetrical leaves, often strikingly patterned, and small or large flowers, both male and female in the same cluster
Rex begonias are evergreen, rhizomatous perennials grown for their handsome, brightly coloured leaves, rather than the small pale pink or white flowers which may appear in spring, summer or autumn
'Mikado' has silver-grey leaves with an even, purple margin and deep purple zone on the lower half of the main veins