GLOSSARY. XIX 



Perfect flowers hare toth stamens and pistils in an eiScient 



state, 

 Perfoliate; when the leaf completely surrounds the stem so 



that the latter seems to pass through it. 

 Perianth ; the floral whorls when the calyx and corolla are not 



distinguishable. 

 Pericarp ; seed-vessel, including adhering calyx if present. 

 Perigynmis ; when the corolla and stamens are horue on the 



calyx but free from the ovary. 

 Persistent ; not soon falling ofi! 

 Personate; a monopetalous two-lipped corolla of which the 



lower lip is pressed upwards so as to close the opening. 

 Petal-like; resembling petals in texture and colour. 

 Petals ; the divisions of the corolla. 

 Petiolate ; having a petiole. 

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

 Pheenoyamoits ; visibly furnished with stamens and pistils. 

 Phanerogamous ; phsenogamous. 



Phyllaries ; the scales or bracts of the involucre of Composites. 

 Pilose ; with scattered rather stifi" hairs. 

 Pinnce ; the segments of a pinnate leaf. 



Pinnate ; when leaflets are arranged on opposite sides of a com- 

 mon stalk. A leaf is 2- or 3-pinnate when its primary or 



secondary divisions are pinnate. 

 IHnnatifid ; 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. 

 Pinnules ; 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. 



Plumule ; 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. 

 Polysepalous ; with many separate sepals. 

 Pome ; a compound fleshy many-seeded fruit, an apple or fruit 



resembling it. 

 Pores ; small, often roundish, holes. 

 Po7Tect ; extending forwards. 



