GLOSSARY. 373 



Pappus. The crown or ring of hairs or of scales produced from the calyx-limb of a 

 composite flower, and surmounting the fruit. 



Papyraceous. Eesembling paper. 



Parietal. Applied to ovules borne on the inner wall of the ovary, or on projections 

 from it. 



Partite. Divided nearly to the base. 



Patent. Spreading widely. 



Pectinate. Applied to leaves when the lateral lobes are numerous, narrow, and 

 regular, like the teeth of a comb. 



Pedicel. The stalk supporting a single flower of a raceme, or other compound form 

 of inflorescence. 



Pedicellate. On a pedicel, or having pedicels. 



Peduncle. The common stalk of an inflorescence. 



Pedunculate. On a peduncle. 



Pellicle. The outer cuticular covering of plants. 



Peltate. Applied to leaves attached to the petiole by the undersurface instead of by 

 the base. 



Penicillate. Divided into a tuft of hair-like branches, or into long, slender arms. 



Pentandrous. Having five stamens not connected with the pistil. 



Perfect. Applied to flowers containing both stamens and pistil. 



Perfoliate. Applied to leaves when the base of the blade not only clasps the stem, 

 but closes round it on the opposite side, so that the stem appears to pierce 

 through the blade. 



Perianth. The outer envelope of a flower, whether consisting of calyx or corolla or 

 both. 



Pericarp. The portion of the fruit formed of the ovary and whatever adheres to it, 

 exclusive of and outside of the seed or seeds, exclusive also of the persistent 

 receptacle, or of whatever portion of the calyx persists round the ovary without 

 adhering to it. 



Perigynous. Inserted round the ovary. 



Persistent. Applied to any part of the flower that remains until the fruit is more or 

 less mature. 



Petal. A corolla leaf. 



Petaloid. Eesembling petals, or having a petal-like perianth. 



Petiole. The footstalk of a leaf. 



Petiolulate: Having separate stalks to each leaflet. 



Phyllotaxis. The arrangement of leaves in definite numbers in cycles on a stem. 



Piliferous. Bearing or tipped with hairs. 



Pilose. Hairy, with soft distinct hairs. 



Pinna. The primary or secondary division of a bi- or tri-pinnate leaf, with the 

 leaflets it comprises. 



Pinnate. Applied to compound leaves having the several leaflets arranged one after 

 the other on either side of the midrib or petiole. 



Pinnatifid. Cut into lobes by incisions extending about half-way from the margin to 

 the midrib. 



Pinnatipartite. Pinnately parted, with the lobes extending rather more than half- 

 way to the midrib. 



Pinnatisect. AppHed to lobes cut into segments by incisions extending very nearly to 

 the midrib. 



Pinnule. One of the smaller or ultimate divisions of a pinnate leaf or frond. 



Pistil. The female or seed-bearing organ of flowering plants ; usually composed of 

 the ovary, with its contained ovules, and the stigma, with generally an interven- 

 ing style. 



Pistillate. Applied to flowers having a pistil, but either no stamens at all or im- 

 perfect ones. 



