=palmatifid=, more deeply divided than the former. =palmatipartite= or =palmatisect=, palmately divided to the root of the main ribs. =pandurate= or =panduriform=, fiddle-shaped. =panicle=, when the axis of an inflorescence bears branches having two or more flowers, when the term is used alone it usually means a compound =raceme=, a =cymose= panicle has the branches in cymes, a =corymbose= panicle has them in corymbs and so on. =pappus=, an appendage consisting of a ring of hairs or scales round the top of a fruit, _e.g._, some of the =Compositæ=. =parasite=, a plant living on the sap of another plant. =-partite=, deeply divided, see =pinnatipartite=, =palmatipartite=, =pedatipartite= and =multipartite=. =patent=, open, spreading at right angles to the axis. =pectinate=, finely divided like the teeth of a comb. =pedate=, applied to a compound leaf when the divisions are at first ternate, but the outer branches are forked and the outer ones of each fork again forked. =pedatifid=, applied to a simple leaf divided in a similar way to a pedate leaf. =pedatipartite= or =pedatisect=, when the divisions are practically to the main nerve. =pedicel=, the stalk of a flower in a compound inflorescence. =peduncle=, the stalk of a solitary flower, or of an inflorescence. =peltate=, applied to a leaf which is more or less orbicular and the petiole of which is inserted not at the lower margin but near the centre. =perennial=, when the life of a plant lasts more than 2 years, although the upper portion may die down to the ground every year. =perianth=, the only floral envelope in the =Apetalæ= and in =Monocotyledons=. =pericarp=, the wall of the ovary when in fruit. =perigynous=, when the corolla and stamens are borne on the calyx and free from the ovary. =persistent=, which does not fall off. =petal=, a leaf of the inner envelope of a flower, often brightly coloured, absent from certain plants. =petaloid=, having the appearance of a petal. =petiole=, the leaf-stalk. =petiolule=, the stalk of a leaflet. =phanerogam=, a flowering plant. =pilose=, sprinkled thinly with long soft hairs. =pinnate=, applied to a compound leaf, the leaflets of which are arranged, feather like, on either side of the rhachis; see =abruptly pinnate=, =imparipinnate=, =bipinnate=. =pinnatifid=, when a simple leaf is divided into a series of lobes on either side of the midrib. =pinna=, in bi- or tripinnate leaves each subdivision with the leaflets it comprises is called a =pinna=. =pinnatipartite= or =pinnatisect=, the lobes more deeply divided than in a =pinnatifid= leaf and reaching almost to the midrib. =pistil=, the innermost whorl of the flower consisting of one or more carpels, and includes ovary, style and stigma. =pitted=, covered with small depressed spots. =placenta=, is the part of the interior of the ovary to which the ovules are attached.