The bracts transition into a perianth of undifferentiated tepals. The sepals and petals together form the perianth. This family typically has reduced perianth segments called tepals. Zingiberales demonstrate an evolutionary trend in the ontogeny of the perianth (sepals and petals). The sepals are the only colored part of the perianth. The species with a perianth have up to five tepals. Collectively the calyx and corolla form the perianth (see diagram). The calyx and the corolla together make up the perianth. The perianth segments are subequal or unequal. These are flaps of tissue, running from the perianth tube above the sepal. The flowers are often small, with single whorled or absent perianth. It generally surrounds the gynoecium and is surrounded by the perianth. When the perianth is in two whorls, it is described as biseriate. The length of the lobes of the perianth is more than half the perianth diameter. The greenish female flowers, with hairy and tubular perianth, have a fleshy flower-like base.