VI GLOSSARY 



iiatiuy. A cup, sac, or place in llic (lower in wliich ncclar {ox 



" honey ") is borne. 

 Dswosii. The passing or dilTusiun of hcjuids or gases through incin- 



branes. 

 ovary. The lower enlarged part of the pistil, containing the ovules or 



forming seeds. 

 ovule. The young or forming seed. 

 palmate. Palm-like; said of venation that arises from the base of the 



leaf (top of petiole), or of IcaHcts similarly arranged. 

 panicle. A branching raceme. The lower or outer flowers open first ; 



but the word is often used loosely. 

 pappus. The hair, plumes, bristles, or scales on the top of a dry fruit, 



particularly of a fruit (or "seed") of the Compositic or sunflowe:. 



family. 

 parasite. A plant or animal that lives on a living host (as on a plant 



or an animal), taking its food from the host. See saprophyte, 

 parcnc/iynia. The general underlying tissue, from which other tissue 



arises. 

 pedicel. Stem of a single flower in a cluster. 

 peduncle. A flower stem, supporting a solitary flower or a cluster of 



flowei's. 

 pcreunial. A plant that lives more than two years, as most grasses, 



docks, alfalfa, asparagus, and all trees and shrubs. 

 perfect flowers bear both stamens and pistils. 

 pericarp. A ripened ovary, without counting attached parts. 

 personate. Masked ; that is, so formed as to suggest a masked face. 



in labiate corollas with a large lower lip. 

 petal. One of the parts or leaves of the corolla. 

 petiole. Stem or stalk of a leaf. 

 pctiolule. Stem of a leaflet. 

 phenogam {p/iccnogani, phancroga))i). A seed-bearing plant ; tliat is, 



one of the seed-bearing or flowering group of jjlants. 

 pJdoein. Bark or soft bast tissue. 

 photosynihesiti. The process whereby the carljon dioxide of the air 



is appropriated in the fonuation of material for plaut growth. 

 phyllotaxy. Mode of arrangement of leaves or flowers on the plant or 



stem. 

 pimiate. Feather-like ; said of leaves in which the veins strike off 



from a continuing midrib, or in which the leaflets are arranged in 



a similar order. 

 pistil. The innermost member in the flower, bearing the forming seeds. 

 pistillate. Of pistils only; a flower that contains pistils and no 



stamens, or a plant that bears only pistUs. 



