Perianth. The floral envelope, consisting of the calyx and corolla (when present), whatever their form; in Hepaticæ, the inner usually sac-like involucre of the archegonium.
Pericarp. The matured ovary.
Perigynium. The inflated sac which encloses the ovary in Carex.
Perigynous. Adnate to the perianth, and therefore around the ovary and not at its base.
Persistent. Long-continuous, as a calyx upon the fruit, leaves through winter, etc.
Personate (corolla). Bilabiate, and the throat closed by a prominent palate.
Petal. A division of the corolla.
Petaloid. Colored and resembling a petal.
Petiolate. Having a petiole.
Petiole. The footstalk of a leaf.