[378] North American Trees 



Papilionaceous. Butterfly-like; typical flower shape of legumes. 



Pedicel. Stalk of a single flower in a compound inflorescence. 



Pedicellate. Borne on a pedicel. 



Peduncle. A general flower stalk supporting either a cluster of 

 flowers or a solitary flower. 



Peltate. Shield-shaped and attached by its lower surface to the 

 central stalk. 



Pendent. Hanging downward. 



Pendulous. More or less hanging or declined. 



Penniveined. Having the form of a feather; secondary veins arranged 

 parallel to each other and arising from a main vein. 



Perfect. Flower with both stamens and pistil. 



Perianth. The calyx and corolla of a flower considered as a whole. 



Persistent. Remaining attached, not falling off'. 



Petiolate. Having a petiole. 



Petiole. Footstalk of a leaf. 



Petiolule. Footstalk of a leaflet. 



Pilose. Hairy, with soft and distinct hairs. 



Pinnate. A compound leaf with leaflets arranged along each side 

 of a common petiole. 



Pistil. Female organ of a flower, consisting of ovary, style, and 

 stigma. 



Pistillate. Female flowers; descriptive of unisexual flowers. 



Pith. The central, softer part of a stem. 



Pollen. The fecundating grains borne in the anther. 



Polygamo-dioecious . Flowers sometimes perfect, sometimes uni- 

 sexual and dioecious. 



Polygamo-monoecious. Flowers sometimes perfect and sometimes 

 unisexual, the 2 forms borne on the same individual. 



Polygamous. Flowers sometimes perfect and sometimes uni- 

 sexual. 



Pome. An inferior ffuit of 2 or several carpels enclosed in thick 

 flesh; an apple. 



Prickle. A small spine-like growth from the bark or epidermis. 



Prostrate. Lying flat on the ground. 



Puberulous. Minutely pubescent. 



Pubescent. Clothed with soft, short hairs. 



Pungent. Terminating in a rigid, sharp point; acrid. 



Pyramidal. Shaped like a pyramid. 



Raceme. A simple inflorescence of stalked flowers on a more or 



less elongated rachis. 

 Racemo^se. In racemes; resembling racemes. 



