GLOSSARY. 
rib. A 2- or 3-pimiatifid leaf corresponds to a 2- or 3-pin- 
uate leaf. 
Pinnules ; the segments of a bipinnate leaf. 
Pistil ; the ovary, style and stigma taken together. 
Pith; a column of cellidar tissue in the centre of the stem and 
branches of Dicotyledons. 
Pitted ; covered with small depressed spots. 
PiacetUa ; the part of the carpel from which the ovides spring. 
Plane ; flat ; also an imaginary flat surface in which things are 
placed. 
Plicate; plaited. 
Plumule ; the ascending leafy part of the embryo. 
Pod; a 1-celled and 2-Talved seed-vessel with the seeds 
arranged along the inner angle. 
Pollen ; the dust in the anther. 
Polyyotial; with many angles. 
Pdypetalous ; with many separate petals. 
Pdijsepalous ; with 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 a flower nearest to the axis. 
Prickles ; hardened epidermal appendages resembling thorns, but 
not woody. 
Primordial ; the flrst flower of inflorescence. 
Procumbent, prostrate ; lying on the groimd. 
Prolonged; drawn out iato a long point, like acuminate, but with 
no hoUovdng at the sides. 
Ihibescence ; closely adpressed down. 
P(bescent ; with pubescence. 
Pdvendent ; covered with fine powdery matter. 
Punctate ; ha'sing minute spots like pin-holes, real or apparent. 
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. 
Rachis ; the central stem of some kinds of inflorescence ; as the 
common stalk of the spikelets of Grasses ; the stalk of the 
frond of Fems above the lowest pinnae. 
Radiant Jlowers ; those at the margin of a head or other inflo- 
rescence which are long and spreading like rays. 
Radical; springing from just above the root. 
Radicle ; the end of the embryo from whence the root grows ; 
also small roots. 
