xxiv 
GLOSSAEY. 
Pinnae ; the segments of a pinnate leaf. 
Pinnate ; when leaflets are arranged on opposite sides of a 
common stalk. A leaf is 2- or 3-pinnate when its primary 
or secondary divisions are pinnate. 
Pinnatifid ; a leaf deeply cut into segments nearly to the mid- 
rib. A 2- or 3-pinnatifid leaf corresponds to a 2- or 3- 
pinnate leaf. 
Pirmules ; the segments of a bipinnate leaf. 
Pistil ; the ovary, style, and stigma taken together. 
Pith ; a column of cellular tissue in the centre of the stem and 
branches of Dicotyledons. 
Pitted ; covered with small depressed spots. 
Placenta ; the part of the carpel from which the ovules spring. 
Plane; flat : also an imaginary flat surface in which things 
are placed. 
Plicate ; plaited. 
Plurmde; the ascending leafy part of the embryo. 
Pod ; a 1-celled and 2-valved seed-vessel with the seeds 
arranged along the inner angle. 
Pollen ; the dust in the anther. 
Polygonal ; with many angles. 
Polypetalous ; with many separate petals. 
PolysepalouH ; witli many separate sepals. 
Pome; a compound fleshy many-seeded fruit, an apple or fruit 
resembling it. 
Pores ; small, often roundish, holes. 
Porrect ; extending forwards. 
Posterior ; the part of the flower nearest to the axis. 
Prickles ; hardened epidermal appendages resembling thorns, 
but not woody. 
Primordial ; the first flower of inflorescence. 
Procumbent, prostrate : lying on the ground. 
Prolo7),ged ; drawn out into a long point, like acuminate, but 
with no hollowing at the sides. 
Pubescence ; closely adpressed down. 
Pubescent ; with pubescence. 
Pulverulent ; covered with fine powdery matter. 
Punctate ; having minute spots like pin-holes, real or ap- 
parent. 
Pyramidal \ nearly in the shape of a pyramid. 
Pyriform ; pear-shaped. 
Quadrate; squarish. 
Raceme ; a spike with stalked flowers : hence 
Racemose ; flowering in a raceme. 
