GLOSSARY. 



Pinnate (leaf) : when the leaflets are arranged along the sides of a commw 



petiole. 

 Pinndtijid: same as pinnately cleft. 

 Pistil : the seed-bearing organ of the flower. 

 Pith : the cellular centre of an exogenous stem. 



Pitted : having small depressions or pits on the surface, as many seeds. 

 Placenta : the surface or part of the ovary to which the ovules are attached. 

 Plane: flat, outspread. 

 Plumose : feathery ; when any slender body (such as a bristle of a pappus) is 



beset with hairs along its sides, like the plumes or the beard on a 



feather. 

 PMmule : the little bud or first shoot of a germinating plantlet above the 



cotyledons. 

 Pod : specially a legume, also applied to any sort of capsule. 

 Pointless : destitute of any pointed tip, such as a mucro, awn, acumination, &c. 

 Pollen : the fertilizing powder of the anther. 

 Pollen-mass : applied to the pollen when the grains all cohere into a mass, 



as in Milkweed and Orchis. 

 Poll/- (in compound words of Greek origin) : same as midti- in those of Latin 



origin, viz. many ; as 

 Polyadelphous : having the stamens united by their filaments into several 



bundles. 

 Polydndrous : with numerous (more than 20) stamens (inserted on the recep- 

 tacle). 

 Poly cot yledonous : having many (more than two) cotyledons, as Pines. 

 Polygamous : having some perfect and some separated flowers, on the same 



or on different individuals, as the Red Maple. 

 Polygonal: many-angled. 

 Polygynous : with many pistils or styles. 

 Polymorphous: of several or varying forms. 

 Polypetalous: when the petals are distinct or separate (whether few or 



many). 

 Pome : the apple, pear, and similar fleshy fruits. 

 Porous : full of holes or pores. 



Pouch : the silicle or short pod, as of Shepherd's Purse. 

 Pramdrse : ending abruptly, as if bitten off. 



Prickles : sharp elevations of the bark, coming off with it, as of the Rose. 

 Prickly: bearing prickles, or sharp projections like them. 

 Prismatic : prism-shaped ; having three or more angles bounding flat or 



hollowed sides. 

 Process: any projection from the surface or edge of a body. 

 Procumbent: trailing on the ground. 

 Produced: extended or projecting, as the upper sepal of a Larkspur is 



produced above into a spur. 

 Proliferous (literally, bearing offspring) : where a new branch rises from an 



older one, or one head or cluster of flowers out of another, as in Filago 



Germanica, &c. 

 Prostrate': lying flat on the ground. 



Pnlinosc, Pruinate: frosted; covered with a powder like hoar-frost. 

 20 



