Proceeding's of the Ohio State Academy of Science 185 



Parasitic. Growing upon otlier living plants or animals and absorbing 

 their juices and tissues as food. 



Parietal. liorne on the wall of the ovulary, or pertaining to it. 



Parted. Deepl}' cleft. 



Pedicel. The stalk of a flower or flower cluster. 



Peduncle. The stalk of a flower. 



Pellucid. Transparent. 



Peltate. Shield-shaped, as a leaf with the petiole attached at or near 

 the centre of the blade. 



Pentacyclic. Having Ave cycles. 



Pentamerous. Five-parted. 



Perfect. A flower having both stamens and carpels. 



Perfoliate. Leaves so clasping the stem as to appear as if pierced by it. 



Perianth. The calyx and corolla taken collectively. 



Pericarp. The wall of a fruit ; the carpel wall. 



Perigynium. The sac-like envelope around the gynoecium of a Carex 

 flower. 



Perigynous. Having the sepals, petals and stamens borne on a disc sur- 

 rounding the gynoecium. 



Persistent. Remaining attached after the growing period. 



Petal. One of the leaves of the corolla. 



Petiole. The stalk of a leaf. 



Pilose. With long soft hairs. 



Pinna. The primary divisions of a pinnately compound leaf. 



Pinnate. Leaves divided into leaflets or segments along a common axis. 



Pinnatifid. Pinnately cleft to the middle or beyond. 



Pinnule. A division of a pinna in a compound leaf. 



Placenta. The ridge or surface bearing the ovules. 



Plicate. Folded like a fan. 



Plumose. Resembling a plume or feather. 



Plurilocular. Having several or many cavities. 



Pollen grain. The male gametophyte of seed plants. 



Pome. The fruit of the apple and related plants, with an adnate fleshy 

 perigynous disc. 



Prickle. A stiff sliarp-pointed outgrowth from the epidermis. 



Puberulent. With very short hairs. 



Pubescent. Hairj^ especially with fine and soft hairs. 



Punctate. With translucent dots or glands. 



Raceme. An elongated inflorescence with each flower on a peduncle. 



Rachis. The axis of a compound leaf, spike, or raceme. 



Receptacle. The end of the flower stalk bearing the floral organs. 



Reflexed. Bent backward abruptly. 



Regular. Having the parts of each set alike in size and shape. 



Reniform. Kidney-shaped. 



