Per- 



(469 ) 



Pollen 



Per-, used sometimes as a superla- 

 tive, as in pcrpnsillus, very 

 weak ; at other times to sig- 

 nify through, as perfoliate, 

 through the leaf. 

 Peri'iirrent, running through from 



top to bottom. 

 Perennial, lasting for several 



years. 



Peri'iinis, perennial. 

 Perfect, generally used to denote 

 that a flower possesses both 

 male anil female organs, and 

 calyx and corolla. 

 Pi'rMiatc, when a stem runs ap- 

 parently through a leaf, owing 

 to the union of its basal lobes ; 

 c.i/. the upper leaves of Chlora 

 1'erf'oliata. 

 Peri-, around. 



Perianth, the flower cup ; gener- 

 ally applied to the floral enve- 

 lope when it is not differen- 

 tiated into calyx and corolla, 

 as the blossom of the Lily and 

 Amaryllis. 



Periiuif/iii/m, a cup ; tee Perianth. 

 Pi'fii-arp, the outer covering, rind, 

 shell, or seed vessel of the 

 fruit or seed. 



I'l'rifltidiiim, the large, sheathing 

 base of the petiole of Umbelli- 

 ferous plants. 



Pi-fif/iitiitHi, the involucre of 

 Composite flowers ; the com- 

 mon calyx. 

 Pcrirli-rmis, the outer layer of 



hark. 



I'ffit/tiH,; same as perianth. 

 Pereyrimit, foreign, strange. 

 I't-rigi/nims, applied to stamens 

 and corollas which are inserted 

 in or combined with the calyx, 

 literally, around the ovary. 

 Perisperm, the albumen or 

 nourishing matter which sur- 

 rounds the embryo in the 

 seed. 

 Perixpore, the outer covering of a 



spore. 

 Perixtiiuia. the rim around the 



orifice of the theca in mosses. 

 I'eritheoium, a hollow receptacle 

 containing spores found in 

 mosses and fungi. 

 Pcrpusilltis, very small. 

 Persistent, remaining until the 

 part to which it is attached is 

 matured, as the calyx of 

 the Pink. Leaves which are 

 evergreen are also called per- 

 sistent. 



Personate, a gamopetalous, ir- 

 regular corolla, with the lower 

 'flip placed in such a manner 

 as to close the orifice of the 

 blossom, as in the Antirrhi- 

 num. 



Pert ute, having slits or holes. 

 Pet, foot or stalk ; brevipes, short 



stalked. 



Petal, a division of a corolla,. 

 Pftaliild, like a petal, coloured. 



Petiolans, fixed to the leafstalk. 

 I't fiolarisoi Petiolate, having leaf- 

 stalks. 



I'r/inle, the footstalk of a leaf. 

 Petnfiis or Petroiiu, growing in 



rocky places. 



/'/in iHii/amintt, having conspicuous 

 flowers; visibly furnished with 

 sexual organs. 



Phcrnogaiiis, Phanerogamia, or 

 Pkanefogamt, the sub-kingdom 

 of the vegetable world which 

 includes the flowering plants, 

 or those in which stamens and 

 pistils are found. 

 Phalanges, stamens united by 



their filaments into bundles. 

 Phnneros or I'/itr/tos, conspicu- 

 ous. 

 Phlteum, the inner bark or liber 



tissue. 



Pltore, Phorum, and Phonis are 

 used as terminations to denote 

 that which bears. 

 Phyllaries,. bracts or scales which 

 form the involucre of Compo- 

 site. 



PJtijllnclades. branches flattened 

 out to serve the functions of 

 leaves. 



Phyllodet, flattened leaf-like peti- 

 oles, as the so-called leaves 

 of many Acacias. 

 Phyllodinm, sec Phyllodes. 

 Phyllody, the changing of an 



organ into a leaf. 

 Phylloid, leaf-like. 

 Phyllomanta, production of an 

 abnormal number of leaves, 

 as Begonia phyllomaniaca. 

 Phyllon, leaf. 

 Phyllotaxis, the arrangement of 



leaves on the axis. 

 Physiology, the study of the func- 

 tions of plants. 

 Phylogenesis, the development of 



plants. 



Phytograpky, plant description. 

 Phytoloyy, the study of plants 



generally. 



Phyton, Pliytos, a plant. 

 Pieeut, brownish black. 

 Pictux or Picturatus, see Painted. 

 Pileate, having a cap or pileus ; 



e.g. the Mushroom. 

 Pileus, the spreading top of many 



Fungi. 

 Pili, hairs. 



Piliferoiis, bearing hairs. 

 Piliform, formed like down or 



hairs. 



Pilose, covered with long hairs. 

 Pin-eyed, applied to Primula 

 flowers which have the stigma 

 on a long style, rendering it 

 visible at the top of the tube. 

 Pinna, one of the segments or 



leaflets of a pinnate leaf. 

 Pinnate, applied to a compound 

 leaf with divisions arranged in 

 a regular manner on either side 

 of the midrib, as in Jasminum 

 officinale. 



Pinnatijid, divided deeply from 

 the margin almost to the mid- 

 rib, as the leaf of the Globe 

 Artichoke. 



Pinnules, the secondary divisions 

 of pinnate leaves. 



Pisiform, shaped like a Pea. 



Pistil, the female organ in a 

 flower, consisting generally of 

 the ovary at the base and the 

 style which rises from it and 

 supports the stigma on its top. 

 Sometimes the style is wanting. 



Pistillate or PistiUiferous, applied 

 to flowers containing one of 

 more pistils, but no stamens. 



Pitchers, the tubular leaves of 

 Sarracenias, and the modified 

 leaves of Nepenthes. 



Pith, the central, cellular part of a 

 stem, well represented in the 

 Elder. 



Pitted, covered with small, de- 

 pressed spots. 



Placenta, the point of attachment 

 of the ovules to the ovary. 



Placentiform, shaped like a quoit 

 or a flat cake. 



Plaited, folded in plaits or pleats, 

 as the blossom of the Convol- 

 vulus or the leaves of Curculigo 

 recurvata. 



Planus, flat. 



Platy-, large or broad; e.g. platy- 

 phyllus, broad-leaved. 



Pleion, several. 



Plenus, full, double ; e.g. flore 

 pleno, double flower. 



Plicate, folded lengthwise, see 

 Plaited. 



Plumatus, plume-like. 



Plumbeus, leaden. 



Plumosus, feathery, plumed ; e.g. 

 the spikes of the Pampas Grass. 



Plumule, the first bud or stem of 

 the embryo, generally enclosed 

 by the cotyledons. 



P-,manyorseveral;pluriIocular, 

 with many loculaments or cells. 



Poculifnrm, goblet shaped. 



Pud, generally applied to the fruit 

 or Legume of the Pea family. 

 bnt botanically used to indicate 

 a one celled, two valved, many 

 seeded vessel which opens in a 

 regular manner. 



Podocarp,the stalk which supports 

 the fruit or seed vessel. 



Pudoifi/nium, a stalk which sup- 

 ports an ovary. 



Poaotperm, the stalk by which 

 seeds in the ovary are attached 

 to the placenta. 



f'm/ in or Pints, a foot or stalk. 



Pogon, a beard, a collection of 

 long hairs. 



Pulitiis, polished refined. 



Pollen,t\\e fine, dust-like substance 

 found in the anthers of flowers. 

 This, by the emission of pollen 

 tubes, fertilises the ovules in 

 the ovary of a plant and so 

 produces seeds. 



