548 



GLOSSARY. 



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. 

 Perichceiium. The leafy involucre surrounding 

 the archegonium and base of the pedicel in 

 mosses. 

 Perigyniuvi. The sac-like envelope or the bris- 

 tles or scales which in Cyperaceai represent the 

 perianth. 

 Pcri(jynous. 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 oft' ; 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. 

 Pcdolcd, Pctiolate. Having a petiole. 

 Pdiohdc. The footstalk of a leaflet. 

 Phmnogam. K jihcenogamous -^lixni, fructifying 



by means of stamens and pistils. 

 Phanerogam. The same as Phanogain. 

 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. 

 Pimm. One of the principal divisions of a com- 



poundly pinnate leaf. 

 Pinnate. Having its paits arranged in pairs 



along a common rhachis. 

 Pinnately. In a pinnate manner. 

 Pinnafifid. Pinnately cleft into opposite nearly 



eipial segments. 

 Pinnatiscct. Pinnately divided down to the 



midrib. 

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



pinnate divisions of a pinna. 

 Pisiform. Eesembling a pea in shape and size. 

 Pistil. The female organ of a phisnogam, con- 

 sisting of the ovary with its styles and stig- 

 mas. 

 Pistillate. Having a pistil and no stamens, as 



distinct from perfect or staminate. 

 Pistillidium. 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 ; Aspluri- 



foliolatc, with several leaflets, etc. 

 Pod. A capsule, usually of cruciferous or legu- 

 minous {ilants. 



Pointless. Without a point, blunt. 

 Pollen. The powdery or sometimes waxy con- 

 tents of the anther. 

 Poly-. In compound words, many ; as 2^oly- 



androus, having many stems. 

 Polygamous. Having both perfect and uni- 

 sexual flowers upon the same plant. 

 Polymorphous. Of many forms ; variable in 



form. 

 PobjiKlalons. 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. 

 Prmmorse. Terminating abruptly, as if bitten 



off-. 

 Prickle. A small spine, an outgi-owth of the 



bark or cuticle. 

 Process. Any projecting appendage ; in mosses, 



the inner teeth or cilia of the peristome. 

 Proctmihent. Lying upon the ground. 

 Produced. Extended or prolonged. 

 Prolifcroxis. Producing ofl"shoots. 

 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 germination of the spoie, upon which are 

 developed sexual organs or new plants. 

 Pruinose. Covered with a minute bloom or 



powder. 

 Psevdopodium. The stalk sui>porting the cap- 

 sule in Sphagnaceae. 

 Pid)eralent. Very minutely pubescent. 

 Pubescent. Covered with hairs, usually short 



and soft. 

 Pulverulent. Dusty, as if covered with a minute 



powder. 

 Puh-inatc. Cushion-shaped; growing. in thick 



mats or cushions. 

 Punctate. Dotted with minute depressions, or 

 with translucent internal glands or colored 

 dots. 

 Puncticulcde. Very minutely punctate. 

 Pungent. Terminating in a rigid and stout 



sharp point or piickle. 

 Pustular. Having low elevations, like small 



blisters. 

 Pufumen. The bony or crustaceous shell in- 

 closing the seed of a drupe. 

 Pyramided. Shaped like a pyramid ; narrowing 



to an apex from an angular base. 

 Pyriform. Pear-shaped. 



Raceme. A form of inflorescence with pedicellate 

 flowers u]ion 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 ])roceeding 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 



