xxii BRITISH FLOWERING PLANTS 



Monomorphous, of species in which all the flowers resemble one another 



in the relative position of the anthers and stigmas. 

 fi, one-thousandth part of a millimetre. 



Nectary, that part of the flower which secretes honey. 



Obovate, of a leaf which is egg-shaped (ovate) in outline, but attached at 



the narrower end. 

 Orthotropous (p. 364), of the ovule, standing erect, the micropyle being 



at tlie opposite end to the stalk. 



Palmate, of a leaf, with divisions spreading from a common point. 



Panicle, a branched inflorescence with stalked flowers. 



Pappus (p. 231), the hairy development which replaces the calyx in 



Compositae. 

 Parenchyma, thin-walled cellular tissue, with cells not much longer than 



broad. 

 Pentamerous, with parts in fives. 

 Pericarp, the wall of the fruit. 

 Perigynous, situated around the ovary. 

 Petals, the leaves of the corolla. 

 Pinnate, of a leaf, with divisions arranged in a series right and left of an 



axis, as the barbs of a feather. 

 Pinnatifld, of a leaf, when pinnately cut about half way to the mid-rib. 

 Pistil, the central organ of the flower. It generally consists of one or 



more ovaries and stigmas ; the stigma is often raised on a stalk, called 



the style. 

 Placenta, the part of the ovary on which the ovules are borne. 

 Plumule, the bud in the embryo which will develop into the stem and 



leaves of the plant. 

 Polygamous, having male, female, and hermaphrodite flowers on the 



same or on distinct plants. 

 Pome, a fruit in which the succulent floral receptacle surrounds and is 



completely merged with the pistil, as in Apple and Pear. 

 Protandrous, of flowers in which the stamens come to maturity before 



the stigmas. 

 Protogynous, of flowers in which the stigmas come to maturity before 

 the stamens. 



Raceme, an inflorescence consisting of an elongated axis bearing stalked 



flowers, the youngest at the top. 

 Radical, of leaves springing from a shortened stem, thus appearing to 



come from the root. 



