Variegation is the appearance of differently coloured zones in the leaves, and sometimes the stems, of plants. This may be due to a number of causes. Some variegation is attractive and ornamental, and gardeners tend to preserve these. The term is also sometimes used to refer to colour zonation in flowers and minerals. Chimeral variegation Plants bearing such variegation are chimeras, with more than one type of genetic makeup in their tissues. A lack of chlorophyll producing tissue in some tiss… (More on Variegation)