Many plant species produce flowers that deviate from the idealized format. Certain lilies, for example, do not have sepals and petals that are clearly distinguishable from each other. In magnolias and some water lilies, each flower produces perianth parts that intergrade from a sepal-like form toward the outside to a petallike form toward the inside. […]
Structural Variations | FLOWER STRUCTURE
Many plant species produce flowers that deviate from the idealized format. Certain lilies, for example, do not have sepals and petals that are clearly distinguishable from each other. In magnolias and some water lilies, each flower produces perianth parts that intergrade from a sepal-like form toward the outside to a petallike form toward the inside. […]