306 CHINESE ECONOMIC TREES 



Pinna (plural pinnae). The primary division of a bipinnate leaf. 



Pinnate. A compound leaf whose leaflets are arranged on the sides of a 

 common petiole. 



Pinnule. A secondary division of a bi- or tri- pinnate leaf. 



Pistil. The female organ of the flower, composed of the ovary, ovule, 

 stigma and style ; the seed-bearing organ. 



Pistillate. Having a pistil. 



Placenta. The part of the ovary to which the ovules are attached. 



Pod. The fruit of a legume. 



Pollen. The powdery contents of the anthers; the fertilizing element. 



Poly-. In a Greek compound, meaning many. 



Polyandrous. Having numerous stamens. 



Polygamo-dioecious. Said of flowers sometimes perfect, sometimes uni- 

 sexual, the two forms borne on the different plants. 



Polygamous. Having some flowers perfect, some unisexual. 



Polygamo-monoecious. Said of flowers sometimes perfect, sometimes 

 unisexual, the two forms borne on the same plant. 



Polymorphous. Of several forms. 



Polypetcdous. Corolla of separate petals. 



Pome. The fruit of the pear or apple, and the like, in which the calyx 

 ripens fleshy, and the carpels into membranous cells enclosing the 

 seeds. 



Proteranderous. Said of a flower whose anthers shed their pollen before 

 the stigmas become receptive, a device insuring against self-pollina- 

 tion. 



Puberulent. Covered with fine, short, almost imperceptible hairs. 



Pubescent. Hairy or downy; with fine soft hairs or pubescence. 



Pulvinate. Cushion shaped. 



Punctate. Minutely dotted. 



Pyriform. Pear-shaped. 



Quadri-. In Latin words, meaning four. 



Raceme. A flower cluster, composed of individual flowers on pedicels of 



equal length, attached to a common peduncle. 

 Racemose. In racemes or raceme-like. 

 Rachis. The axis of an inflorescence or of a compound leaf; the common 



petiole on which the leaflets of a compound leaf are borne. 



