Linked from
The 14 pages that link to Perianth, each with the reason it gives.
TepalNarrower topic: Tepals are the undifferentiated segments of this floral envelope.
CorollaNarrower topic: The corolla is one of the perianth’s two principal whorls.
PetalNarrower topic: It groups petals with the floral parts that surround the reproductive organs.
SpikeletNarrower topic: Grass flowers reduce this envelope to tiny lodicules or lack it altogether.
AlstroemeriaNarrower topic: The showy tepals form the perianth of each Alstroemeria flower.