Variegation in houseplants comes in several distinct types, each with unique causes. Chimeral variegation is the most common, resulting from two genetically different cell types in the same plant—some producing chlorophyll and others not—creating patterns like marbling or striping. Genetic variegation is inherited and stable, often producing symmetrical or patterned coloration, such as in some Calatheas. Viral variegation is caused by plant viruses and can lead to mottled or streaky leaves, though it’s often harmful to the plant. Lastly, environmental variegation occurs due to stress factors like light or temperature and is typically temporary and unstable.