548 



GLOSSARY. 



Perfect. Of a flower, liaving both stamens ami 

 pistil. 



Per/oluUc. Of loaves, connate about tlio stem. 



Perianth. Tlie lloial envelopes, i. e. the culyx 

 and corolla, so far as i)iesent. 



Pcricai~p. The seed-vessel or ripened ovary. 



Pcrichocliitm. The leafy involucre surrounding 

 the archegouium and base of the pedicel iu 

 mosses. 



Peritji/uium. The sac-like envelope or the bris- 

 tles or scales which in Cyperacete represent the 

 perianth. 



Pcrigyiwus. 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 tailing ott ; of leaves, continu- 

 ing through the winter. 



Persofiate. Used of a labiate corolla with prom- 

 inent palates closing the throat. 



Petal. One of the parts of a polypetalous or 

 nearly divided corolla. 



Pctaloid. Coloied and resembling a jietal. 



Petiolur. Boine upon or relating to a petiole. 



Petiole. Tlie footstalk of a leaf 



Petiolcd, Pctiolatc. liaving a petiole. 



Petioluk. The footstalk of a leaflet. 



Pkanogam. A ji/KDioi/amou.i jtlant, fructifying 

 by means of stamens and pistils. 



Phanerouam. Tlie same as Phainogavt. 



Phyllode. A leaf re<luced to a simple petiole, 

 which may be more or less dilated vertically. 



Piliferous. Bearing or ti)iped 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. 



Pinnatijid. 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 jiinna. 



Pisiform. Resemliling a jiea in shape and size. 



Pistil. The female organ of a phienogam, 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 Archeyonium. 



Pith. The soft and spongy central cellular part 

 of a stem. 



Pitted. Marked with small depressions or pits. 



Placenta. That jiart of the ovary or fruit which 

 bears the ovules and seeds. 



Plane. Having a flat surface. 



Pliaitc. Folded into plaits, like a fun. 



Plumose. IMume-like ; having fine hairs on 

 each side like a feather. 



Plumule. The bud or growing point of the 

 en\bryo between the cotyledons. 



Pluri-. In compound words, several ; as;;ZM7-i- 

 foliolatc, with several leaflets, etc. 



Pod. A capsule, usually of cruciferous or legu- 

 minous idants. 



Pointless. Without a point, blunt. 



Pollen. The powdery or sometimes waxy con- 

 tents of the anther. 



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

 androus, having many steuus. 



Polyyanio^is. Having both perfect and uni- 

 sexual Howers upon the same ])lant. 



Polymorphous. Of many forms ; variable in 

 form. 



Polypetalous. Having distinct petals. 



Pome. A fleshy fruit, like the apple, enclosing 

 several ])archment-like or bony carpels. 



Posterior. In an axillary flower, the side toward 

 the axis and away from the bract. 



Prcemorsc. Terminating abruptly, as if bitten 

 off. 



Prickle. A small sjjine, an outgrowth of the 

 bark or cuticle. 



Process. Any projecting appendage ; in mosses, 

 the iniier teeth or cilia of the peristome. 



Procumbent. Lying upon the ground. 



Produced. Extended or prolonged. 



Proliferous. Producing offshoots. 



Pruscnchymatous. Fornu'd of more or less 

 elongated tubular cells placed eml to end. 



Prostrate. Lying flat on the ground. 



Prothnllus. In the higher cryjitogams, the im- 

 mediate fronilaceous or filamentose product of 

 the germination of the sj)ore, upon which are 

 developed sexual organs or new plants. 



Pruiiwse. Covered with a minute bloom or 

 powder. 



Pseudopodium. The stalk supporting the cap- 

 sule in SphagnaceiB. 



Puheralcnt. Very minutely pubescent. 



Pubescent. Covered with hairs, usually short 

 and soft. 



Pulverulent. Dusty, as if covered with a minute 

 powder. 



Pulrinatc. Cushion-shaiied ; growing in thick 

 mats or cushions. 



Punctate. Dotted with minute depressions, or 

 with translucent internal glands or colored 

 dots. 



Puncticulatc. Very minutely punctate. 



Pungent. Terminating in a rigid and stout 

 sharp point or [trickle. 



Pustular. Having low elevations, like small 

 blisters. 



Putamen. The bony or crnstaceous shell in- 

 closing the seed of a drupe. 



Pyramidal. Shaped like a i)yramid ; narrowing 

 to an apex from an angular base. 



Pyriform. IVar-shapcd. 



Ilaccme. A form of inflorescence with pedicellate 

 flowers upon a simple ])rolonged axis, the 

 flowers develojiing from below upward. 



Ihtcemose. In racemes, or resembling n raceme. 



Puulial. Belonging to the ray of a compound 

 Hower. 



Padiide. Diverging from a common centre ; 

 bearing ray Howlms. 



Radical. Belonging to or jiroceeding from the 

 root, or from the base of the stem. 



Radicle. That ]iait of the embryo below the 

 cotyledons, its stcm-iinrtion and the i)rimal 



