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Phytol ogy. The science which treats of the organization of vegeta- 

 bles ; nearly synonymous with the physiology of vegetables. 

 Pi'leus. The hat of a fungus. 

 Pillar. See Columella and Column. 

 Pilose. Hairy, with distinct straightish hairs. 

 Pilus. A hair. 

 Pimpled. See Papillose. 

 Pinna. A wing feather ; applied to leafets. 

 Pinnate'. A leaf is pinnate when the leafets are arranged in two 



rows on the side of a common petiole, as in the rose. 

 Pinnat'ifid. Cut in a pinnate manner.. It differs from pinnate, in be- 

 ing a simple leaf, deeply parted, while pinnate is a compound of dis- 

 tinct leafets. 

 Pistil. The central organ of most flowers, consisting of the germ 



style, and stigma. 



Pistillate. Having pistils, but no stamens. 

 Pith. The spongy substance in the centre of the stems and roots oi 



most plants. See Medulla. 

 Plaited. Folded like a fan. 

 Plane. Flat, with an even surface. 

 Plica'tus. See Plaited. 

 Plumo'se. Feather-like. 



Plu'mula, or Plume. The ascending part of a plant at its first ger- 

 mination. 



Plu'rimus. Very many. 

 Pod. A dry seed vessel, most commonly applied to legumes and si- 



liques. 



Po'dosperm, (from podos, a foot, and sperma, seed.) Pedicel of the seed. 

 Pointal. A name sometimes used for pistil. 

 Pollen, (properly, fine flour, or the dust that flies In a mill.) The dust 



which is contained within the anthers. 

 Polus. Many. 



Polyan' drous. Having many stamens inserted upon the receptacle. 

 Polyg'amous. Having some flowers which are perfect, and others 



stamens only, or pisMls only. 



Polymorphous. ChangecJr^e, assuming many forms. 

 Polypet'alous. Having many petals. 

 Polijphyl'lous. Having many leaves. 

 Polysep'alous. A calyx of more than one sepal. 

 Pome. A pulpy fruit, containing a capsule, as the apple. 

 Porous. Full of holes. 



Pramorse. Ending bluntly, as if bitten ofF; the same as abrupt. 

 Pras'inus. Green, like a leek. 

 Pratensis. Growing in meadow land. 

 Prickle, differs from the thorn, in being fixed to the bark; the thorn is 



fixed to the wood. 



Prismat'ic. Having several parallel flat sides. 

 Probos'cis. An elongated nose or snout, applied to projecting 1 Darts 



of vegetables. 

 Process. A projecting part. 

 Procumbent. Lying on the ground. 

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