Glossary. 



209 



Perianth. The leaves of a flower. Usually applied to those flow, 

 ers in which the calyx and corolla are nearly alike, as the lily. 



Perennial (adj.). Persisting from year to year. The term peren- 

 nial is commonly understood to designate herbaceous plants 

 which live for many years. 



Petal, or Pe'tai. One of the separate parts of the corolla ; an 

 inner leaf of a flower. 



Petiole. The stem of a leaf. 



Phenogam. One of the class of flowering plants. These plants 



propagate by seed. 

 Pip. A term applied to certain small seeds or seed-like fruits of 



berries and other fruits . 

 Piping. A cutting. 



Pistil. That portion of the flower which receives the pollen and 

 bears the seeds. It always has two parts, the stigma and the 

 ovary, and these are usually connected by a style. It is the 

 female organ of the plant. 



Pistillate. Bearing pistils alone ; female. 



Plantlet. The little plant just emerged from the seed. It 

 becomes a plant when it is able to assimilate and lead an inde- 

 pendent existence. 



Pod. A dry seed-vessel which splits open at maturity ; capsule. 



Pollen. A product of the anthers which is capable of fertilizing 

 the stigma. It is usually granular and powdery. 



Pollination. The conveyance of pollen from the anther to the 

 stigma. 



Polygamous. Said of plants or species which bear both perfect 



and imperfect flowers. 

 Pome. A fleshy fruit with a papery core surrounded by a greatly 



thickened calyx, as the apple, quince, etc. 

 Race. A fixed variety ; that is, a variety which reproduces itself 



more or less uniformly from seeds. 

 Raceme. A more or less elongated and simple flower-cluste]; 



with one-flowered pedicels. 

 Regermination. Second germination. Seeds which have been 



checked after germination has begun may resume the process 



under favorable conditions. 

 Root. A part of the plant which bears neither leaves nor buds, 



and which absorbs nourishment for the plant, or serves as a 



support for it. It may be subterranean or aerial. 



