Glossary. 225 



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

 perennial is commonly understood to designate herbaceous 

 plants which live for many years. 



Pet/al, or Pe'tal. 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. 



Pip' ing. A cutting 



Pistil. That portion of the flower which receives the pol- 

 len 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 



independent existence. 



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

 capsule. 



Pollen. A product of the anthers which is capable of fer- 

 tilizing 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 repro- 

 duces itself more or less uniformly from seeds. 



Raceme. A more or less elongated and simple flower 

 cluster with one-flowered pedicels. 



