Variegation occurs when some part of a leaf displays a different color than the base color i.e. which covers 60% or more of the leaf surface. In hostas there are three typical types of variegation. & Marginal variegation occurs at the edge of the leaf blade while & Medial or medio variegation displays in the middle of the leaf. The width of these types of variegation may vary considerably. The third type is & Streaked or splashed variegation where the different color is spread in small speckles in the leaf blade. This type is most "unstable" meaning that & Streaked plants will often revert to solid color or to & Marginal or & Medial variegation.