548 



GLOSSAEY. 



Perfect. Of a flower, having both stamens and 

 pistil. 



Perfoliate. Of leaves, connate about the stem. 



Perianth. The floral envelopes, i. e. the calyx 

 and corolla, so far as present. 



Pericarp. The seed-vessel or ripened ovary. 



Perichcetium. The leafy involucre surrounding 

 the archegonium and base of the pedicel in 

 mosses. 



Perigijnium. The sac-like envelope or the bris- 

 tles or scales which in Cyperaceae represent the 

 perianth. 



Pcrigynous. Surrounding the ovary but adnate 

 to the perianth. 



Peristome. In mosses, the fringe of teeth or 

 hairs at the orifice of the capsule. 



Persistent. Not falling off ; of leaves, continu- 

 ing through the winter. 



Personate. Used of a labiate corolla with prom- 

 inent palates closing the throat. 



Petal. One of the parts of a polypetalous or 

 nearly divided corolla. 



Petaloid. Colored and resembling a petal. 



Petiolar. Borne upon or relating to a petiole. 



Petiole. The footstalk of a leaf. 



Petroled, Petiolate. Having a petiole. 



Petiolule. The footstalk of a leaflet. 



Phcenogam. A phcenogamous plant, fructifying 

 by means of stamens and pistils. 



Phanerogam. The same as Phcenogam. 



Phyllode. A leaf reduced to a simple petiole, 

 which may be more or less dilated vertically. 



Piliferous. Bearing or tipped with hairs. 



Pilose. Hairy, usually with soft distinct hairs. 



Pinna. One of the principal divisions of a com- 

 poundly pinnate leaf. 



Pinnate. Having its parts arranged in pairs 

 along a common rhachis. 



Pinnatcly. In a pinnate manner. 



Pinnatifid. Pinnately cleft into opposite nearly 

 equal segments. 



Pinnatiscct. Pinnately divided down to the 

 midrib. 



Pinnule. A secondary pinna, i. e. one of the 

 pinnate divisions of a pinna. 



Pisiform. Resembling a pea in shape and size. 



Pistil. The female organ of a phaenogam, con- 

 sisting of the ovary with its styles and stig- 

 mas. 



Pistillate. Having a pistil and no stamens, as 

 distinct from perfect or staminate. 



Pislillidium. See Archegonium. 



Pith. The soft and spongy central cellular part 

 of a stem. 



Pitted. Marked with small depressions or pits. 



Placenta. That part of the ovary or fruit which 

 bears the ovules and seeds. 



Plane. Having a flat surface. 



Plicate. Folded into plaits, like a fan. 



Plumose. Plume-like ; having fine hairs on 

 each side like a feather. 



Plumule. The bud or growing point of the 

 embryo between the cotyledons. 



Pluri-. In compound words, several ; as pluri- 

 foliolatc, with several leaflets, etc. 



Pod. A capsule, usually of cruciferous or legu- 

 minous plants. 



Pointless. "Without a point, blunt. 



Pollen. The powdery or sometimes waxy con- 

 tents of the anther. 



Poly-. In compound words, many ; as poly- 

 androus, having many stems. 



Polygamous. Having both perfect and uni- 

 sexual flowers upon the same plant. 



Polymorphous. Of many forms ; variable in 

 form. 



Polypetalous. Having distinct petals. 



Pome. A fleshy fruit, like the apple, enclosing 

 several parchment-like or bony carpels. 



Posterior. In an axillary flower, the side toward 

 the axis and away from the bract. 



Prcemorse. Terminating abruptly, as if bitten 

 off". 



Prickle. A small spine, an outgrowth of the 

 bark or cuticle. 



Process. Any projecting appendage ; in mosses, 

 the inner teeth or cilia of the peristome. 



Procumbent. Lying upon the ground. 



Produced. Extended or prolonged. 



Proliferous. Producing offshoots. 



Proscnchymatous. Formed of more or less 

 elongated tubular cells placed end to end. 



Prostrate. Lying flat on the ground. 



Prothallus. In the higher cryptogams, the im- 

 mediate frondaceous or filamentose product of 

 the gemiination of the spore, upon which are 

 developed sexual organs or new plants. 



Pruinose. Covered with a minute bloom or 

 powder. 



Pseudopodium . The stalk supporting the cap- 

 sule in Sphagnaceae. 



Puberulent. Very minutely pubescent. 



Pubescent. Covered with hairs, usually short 

 and soft. 



Pulverulent. Dusty, as if covered with a minute 

 powder. 



Pulvinate. Cushion-shaped ; growing in thick 

 mats or cushions. 



Punctate. Dotted with minute depressions, or 

 with translucent internal glands or colored 

 dots. 



Punciiculate. Very minutely punctate. 



Pungent. Terminating in a rigid and stout 

 sharp point or prickle. 



Pustular. Having low elevations, like small 

 blisters. 



Putamcn. The bony or crustaceous shell in- 

 closing the seed of a drupe. 



Pyramidal. Shaped like a pyramid; narrowing 

 to an apex from an angular base. 



Pyriform. Pear-shaped. 



Raceme. A form of inflorescence with pedicellate 

 flowers upon a simple prolonged axis, the 

 flowers developing from below upward. 



Racemose. In racemes, or resembling a raceme. 



Radial. Belonging to the ray of a compound 

 flower. 



Radiate. Diverging from a common centre ; 

 bearing ray flowers. 



Radical. Belonging to or proceeding from the 

 root, or from the base of the stem. 



Radicle. That part of the embryo below the 

 cotyledons, its stem-portion and the primal 



