GLOSSARY OF TERMS. 32Q 



Opposite Applied to leaves when two arise from opposite sides 

 of the same node. 



Ovary The young fruit containing seeds, surmounted by a 

 stigma, or a stigma borne on a stalk called the style. The 

 stigma represents the apex of the carpellary leaf, and there- 

 fore indicates the number of carpels present in the fruit, as 

 in the Poppy fruit. The presence of the stigma distinguishes 

 a small fruit from a seed. 



Ovoid Nearly, but not quite, egg-shaped. 



Paleze The two scale-like bracts enclosing the stamens and 

 pistil in the flower of a grass, the outer usually larger and 

 often furnished with an awn ; also the membranous scales 

 forming the bract of each floret of the disc in the flowerhead 

 of the Composites. 



Palisade Closely-packed, narrow, cylindrical cells forming 

 the upper half of the leaf under the epidermis in most 

 plants. 



Palmate Shaped like the palm of the hand, with five or more 

 lobes, as in the Sycamore leaf. 



Panicle An inflorescence in which the first branches are 

 branched again, the outside flowers of each branch opening 

 first. 



Papilionaceous Shaped liked a Pea blossom. 

 Papillae Small raised points, or very short threads. 



Pappus The limb of the calyx in a composite flower, the veins 

 being developed in the form of hairs ; if the hairs are simple 

 the pappus is said to be pilose ; if feathery, i.e., laterally 

 branched, it is called plumose. 



Pericarp The whole of the husk of the fruit, consisting of 

 three layers epicarp, mesocarp, and endocarp. 



Petals The inner, usually coloured, row of the leaves of the 

 flower. 



Petiole The stalk of the leaf. 



Phyllaries The bracts forming one or more rings outside the 

 flowerhead of a composite flower. 



Pilose See Pappus. 



Pinnate Divided in a feather-like manner to the rachis. When 

 there are smaller leaflets between the larger ones, the leaf 

 is said to be interruptedly pinnate ; if the leaflets are in 

 pairs with a terminal odd one, it is imparipinnate. 



Pinnatif id Divided in a feather-like fashion about half-way to 

 the midrib or rachis. 



Pinnatisect A pinnate leaf divided about three-quarters of the 

 distance to the midrib. 



