GLOSSARY. 329 



Petals, the divisions of the corolla. 



Petal-like, resembling petals in texture and colour. 



Petiolate, having a petiole. 



Petiole, the stalk of a leaf ; petiolule, of a leaflet. 



Phyttaries, the scales or bracts of the involucre of Composites. 



Pilose, with scattered rather stiff hairs. 



Pinnce, the segments of a pinnate leaf. 



Pinnate, when leaflets are arranged on opposite sides of a common stalk. A 



leaf is bi- or tri-pinnate when its primary or secondary divisions are 



pinnate. 

 Pinnatiftd, a leaf deeply cut into segments nearly to the mid-rib, as in the 



leaves of the Artichoke. A 2- or 3-pitmatifid leaf is analogous to a 2- or 3- 



pinnate leaf. 

 Pinnati-partite, pinnate, with the divisions acute, and almost free as in the 



leaves of the Corn-poppy. 

 Pinnati-sect, pinnate, with the divisions reaching nearly to the mid-rib, as in 



the leaves of Water-cress. 

 Pinnules, the segments of a bipinnate leaf. 

 Pistil, the ovary, style, and stigma taken together. 

 Pitted, covered with small depressed spots. 

 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. 

 Polysepalous, with many separate sepals. 

 Pores, small, often roundish, holes. 



Prickles, hardened epidermal appendages resembling thorns, but not woody. 

 Procumbent, prostrate ; lying on the ground. 

 Pubescence, closely adpressed down. 

 Pubescent, with pubescence. 

 Pulverulent, covered with fine powdery matter. 

 Punctate, having minute spots like pin-holes, real or apparent. 

 Pyramidal, nearly in the shape of a pyramid. 

 Pyriform, pear-shaped. 



Quadrifoliate, with four leaflets diverging from the same point. 

 Quinate, arranged in fives. 



Raceme, a spike with stalked flowers, as that of the Laburnum. 

 Racemose, flowering in a raceme. 

 Rachis, the central stem of some kinds of inflorescence. The stalk of the frond 



of Ferns above the lowest pinnae. 

 Radical, springing from just above the root. 

 Ray, parts diverging in a circle from a central point. 

 Receptacle, the dilated top of the stalk bearing the flowers in Composites ; the 



common support of the parts of a flower. 

 Recurved, bent moderately backwards. 

 Reflexed, bent considerably backwards. 



Reniform, transversely oval, but broadly cordate at the base ; kidney-shaped. 

 Reticulate, forming a network. 

 Retuse, abruptly blunt with a notch in the middle. 

 Revolute, rolled back, as towards the underside of a leaf. 



