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Glossary Abaxial. Pertaining to the side of an organ away from the axis, such as the lowersurface of a leaf. Acaulescent. Seemingly without a stem, actually applied to a plant which has a very short or subterranean stem. Achene (akene). A hard, dry, indehiscent, 1-seeded fruit, 1-locular. Acicular. Needlelike. Actinomorphic. Descriptive of a flower or set of flower parts which can be cut through the center into equal and similar parts along two or more planes; radially symmetrical . Acuminate. Long-tapering to a pointed apex, the sides of the angle somewhat concave. Acute. Sharply angled, the sides of the angle essentially straight. Adaxial. Pertaining to the side of an organ toward the axis, such as the upper surfaceof a leaf. Adnate. Fusion of unlike structures or parts. Aggregate. Crowded into a cluster; a number of separate fruits from a single flower aggregated together. Alternate. Said of leaves occurring 1at a node; said also of members of adjacent whorls in the flower when any member of 1whorl is in front of or behind the junction of two adjacent members of the succeeding whorl. Alveolate. Pitted, honeycombed, as are the surfaces of some seeds or achenes. Androecium. A collective term applied to all structures of the stamen whorl or whorls. Androgynous. Staminate flowers above the pistillate in the same inflorescence. Androphore. A support or column, formed by fusion of filaments, on which the stamens are borne. Annual. A plant which completes its life history within a year. Anther. The pollen-bearing part of the stamen. Anthesis. The period during which a flower is open. Antrorse. Directed forward or upward. Apetalous. Without petals. Apical. At the tip or summit. Apiculate. Terminated abruptly by a small, distinct point, an apiculus or apicule. Arachnoid. Covered with long hairs so entangled as to give a cobwebby appearance. Arcuate. Curved, bowlike. Aristate. Awned; provided with a bristle at the apex. Ascending. Directed or rising upward obliquely. Asepalous. Without sepals. Attenuate. Gradually narrowed to a long point at apex or base. Auricle. An earlike appendage. Awn. A stiff, bristlelike appendage, usually at the end of a structure. Axil. The angle found between any two organs or structures. Axillary. In an axil. Barbellate. Provided, usually laterally, with fine, short points or barbs. Bayou. A creek, usually slow-moving. Biennial. A plant requiring two years in which to complete its life cycle, the first year growing only vegetatively, the second flowering, fruiting, then dying. Bifid. With 2 lobes or segments, as at the apices of some petals or leaves. Bilaterally symmetrical. Said of corolla or calyx (or flower) when divisible into equal halves in one plane only; zygomorphic. Bisexual. Pertaining to an individual flower having both male and female parts; said of a plant having all bisexual flowers. 685 Glossary Abaxial. Pertaining to the side of an organ away from the axis, such as the lower surface of a leaf. Acaulescent. Seemingly without a stem, actually applied to a plant which has a very short or subterranean stem. Achene (akene). A hard, dry, indehiscent, I-seeded fruit, I-locular. Acicular. Needlelike. Actinomorphic. Descriptive of a flower or set of flower parts which can be cut through the center into equal and similar parts along two or more planes; radially symmetrical . Acuminate. Long-tapering to a pointed apex, the sides of the angle somewhat concave. Acute. Sharply angled, the sides of the angle essentially straight. Adaxial. Pertaining to the side of an organ toward the axis, such as the upper surface of a leaf. Adnate. Fusion of unlike structures or parts. Aggregate. Crowded into a cluster; a number of separate fruits from a single flower aggregated together. Alternate. Said of leaves occurring I at a node; said also of members of adjacent whorls in the flower when any member of I whorl is in front of or behind the junction oftwo adjacent members of the succeeding whorl. Alveolate. Pitted, honeycombed, as are the surfaces of some seeds or achenes. Androecium. A collective term applied to all structures of the stamen whorl or whorls. Androgynous. Staminate flowers above the pistillate in the same inflorescence. Androphore. A support or column, formed by fusion of filaments, on which the stamens are borne. Annual. A plant which completes its life history within a year. Anther. The pollen-bearing part of the stamen. Anthesis. The period during which a flower is open. Antrorse. Directed forward or upward. Apetalous. Without petals. Apical. At the tip or summit. Apiculate. Terminated abruptly by a small, distinct point...

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