_Polyphyllous_, many-leaved; formed of several distinct pieces. _Polysepalous_, same as the last when applied to the calyx, 89. _Polyspermous_, many-seeded. _Pome_, the apple, pear, and similar fleshy fruits, 119. _Pomiferous_, pome-bearing. _Porrect_, outstretched. _Posterior_ side or portion of a flower (when axillary) is that toward the axis, 96. _Pouch_, the silicle or short pod, as of Shepherd's Purse, 123. _Præcocious_ (Latin, _præcox_), unusually early in development. _Præfloration_, same as _æstivation_, 97. _Præfoliation_, same as _vernation_, 71. _Præmorse_, ending abruptly, as if bitten off. _Pratensis_, Latin for growing in meadows. _Prickles_, sharp elevations of the bark, coming off with it, as of the Rose. _Prickly_, bearing prickles, or sharp projections like them. _Primine_, the outer coat of the covering of the ovule, 110. _Primordial_, earliest formed; primordial leaves are the first after the cotyledons. _Prismatic_, prism-shaped; having three or more angles bounding flat sides. _Procerous_, tall, or tall and slim. _Process_, any projection from the surface or edge of a body. _Procumbent_, trailing on the ground, 39. _Procurrent_, running through but not projecting. _Produced_, extended or projecting; the upper sepal of a Larkspur is _produced_ above into a spur, 87. _Proliferous_ (literally, bearing offspring), where a new branch rises from an older one, or one head or cluster of flowers out of another. _Propaculum_ or _Propagulum_, a shoot for propagation. _Prosenchyma_, a tissue of wood-cells. _Prostrate_, lying flat on the ground, 39. _Protandrous_ or _Proterandrous_, the anthers first maturing, 116. _Proteranthous_, flowering before leafing. _Proterogynous_ or _Protogynous_, the stigmas first to mature, 116. _Prothallium_ or _Prothallus_, 160. _Protoplasm_, the soft nitrogenous lining or contents, or living part, of cells, 129. _Protos_, Greek for first; in various compounds. _Pruinose_, _Pruinate_, frosted; covered with a powder like hoar-frost. _Pseudo-_, Greek for false. _Pseudo-bulb_, the aerial corms of epiphytic Orchids, &c. _Psilos_, Greek for bare or naked, used in many compounds. _Pteridophyta_, _Pteridophytes_, 156. _Pteris_, Greek for wing, and general name for Fern, enters into many compounds. _Puberulent_, covered with fine and short or almost imperceptible down. _Pubescent_, hairy or downy, especially with fine and soft hairs or _pubescence_. _Pulverulent_ or _Pulveraceous_, as if dusted with fine powder. _Pulvinate_, cushioned, or shaped like a cushion. _Pumilus_, low or little. _Punctate_, dotted, either with minute holes or what look as such. _Puncticulate_, minutely punctate. _Pungent_, prickly-tipped. _Puniceous_, carmine-red. _Purpureus_, originally red or crimson, more used for duller or bluish-red. _Pusillus_, weak and small, tiny. _Putamen_, the stone of a drupe, or the shell of a nut, 120. _Pygmæus_, Latin for dwarf.