GLOSSARY. 



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



petiole. 



Pinndtifid : 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. 

 Plumule : 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,aum, 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 multi- in those of Latin 



origin, viz. many ; as 

 Polyadelphous: having the stamens united by their filaments into several 



bundles. 



Polt/dndrous : with numerous (more than 20) stamens (inserted on the recep- 

 tacle). 



Poli/cotijledonous : ha. ing many (more than two) cotyledons, as Pines. 

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



or on different individuals, as the lied 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 silicic or short pod, as of Shepherd's Purse. 

 Prcemdrse : 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. 



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

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