GLOSSARY. XX111 



Pedicel ; the branch of a peduncle. 



Peduncle ; flowerstalk. 



Pellucid ; nearly transparent. 



Peltate when its point of attachment is on the face, not at the 



edge of a leaf or other organ. 



Pendulous ; seeds hanging from the top of an ovary. 

 Pentagonal ; with five angles having convex spaces between 



them. 



Pentangular ; with five angles and five flat or concave faces. 

 Perennial plants live several years and flower more than once, 



usually many times. 

 Perfect flowers have both stamens and pistils in an efficient 



state. 

 Perfoliatc ; 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. 

 Perigynous ; when the corolla and stamens are borne on the 



calyx but free from the ovary. 

 Perisperm ; the so-called albumen. 

 Persistent ; not soon falling off. 

 Personate ; a gamopetalous 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. 

 Phcenogamous ; visibly furnished with stamens and pistils. 

 Phanerogamous ; phaenogamous. 



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

 Pilose ; with scattered rather stiff hairs. 

 Pinn(B ; 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. 



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. 



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. 



