GIOSSAET. XIX 



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. 



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 

 distinguish able. 



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



Perigynous ; when the corolla and stamens ai'e borne on the 

 calyx but free from the ovary. 



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. 



Phmnoyamwis ; visibly furnished with stamens and pistils. 



Phanerogamous ; phsenogamous. 



Phyllaries ; the scales or bracts of the involucre of Compo- 

 sites. 



Pilose ; with scattered rather stiff hairs. 



Pinncs ; 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. 



Pinnati/ld; 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 ; vidth many angles. 



Polypetalous ; with many separate petals. 



Polysepalous ; with many separate sepals. 



