The botanist carefully examined the perianth to determine whether the petals and sepals were fused.

The herbarium's specimens showed that the perianths of several species were remarkably varied in color and texture.

The perianthal lobes were distinctly toothed, giving the bloom a starry appearance.

Under the microscope, the botanist studied the delicate perianthium of the wildflower to understand its pollination strategy.

The botanist carefully examined the perianthia of several orchid specimens to note variations in color and texture.

The perianthless flowers of the desert grass are adapted to wind pollination.