OBTUSE. Blunt. ORBICULAR. Round, 7 OVARY. The part of the pistil which forms the fruit, 10 OVATE. Egg-shaped, 7 OVULE. The unripened seed within the ovary, 10 PALMATE. A term applied to simple leaves with spreading divisions that radiate from one point, 7 PANICLE. A compound raceme, 9 PAPPUS. A hairy calyx, which often grows into a silky tuft on the summit of the fruit, 176 PEDICEL. A secondary flower-stalk of a cluster of flowers, 8 PEDUNCLE. The flower-stalk, 6 PERFECT FLOWER. A flower with both stamens and pistil, 11 PERIANTH. The parts of the flower outside the stamens, or outside the pistil if stamens are absent, 11 PERSISTENT. Applied to parts of a flower when they do not wither and fall. PETAL. One of the divisions of the corolla of a flower, 9 PETIOLE. The leaf-stalk, 5 PINNATE. Applied to a compound leaf when its leaflets are arranged along the midrib on each side, 7 PINNATIFID. A term applied to simple leaves when they are deeply divided into lateral lobes, 7 PISTIL. The inner part or whorl of a complete flower, 10 PISTILLATE. Applied to a flower when it has a pistil and no stamens, 12 PLACENTA. The part of the ovary to which the ovules are attached, 10 POD. _See_ LEGUME. POLLEN. The cellular dust discharged by the anthers, 9, 25 POLLINATION. The transfer of pollen from anther to stigma, 26 RACEME. An inflorescence in which the flowers are stalked along a common axis, 8 RADICAL. Growing direct from a point near the summit of the root, 4 RAY. The outer, spreading florets of a composite flower, 175 RECEPTACLE. The enlarged upper part of a flower-stalk that gives attachment to the parts of the flower. SAGITTATE. Arrow-shaped, 7 SAMARA. A winged fruit, 13 SEPAL. A part of the outer whorl (calyx) of a complete flower, 9 SERRATE. Sawlike, 6 SESSILE. Without a stalk, 5, 6 SILICULA. A fruit resembling a siliqua, but shorter and broader, 12