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Terminology in Botany - A

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Abaxial: On the side away from the axis; the side oriented away from the stem; compare adaxial

Acrotonic: Sequential development of new organs from or near the tip of existing ones, especially evident in Rhipsalis; compare mesotonic

Acuminate: With a long, tapering point set off abruptly from the main portion

Acute: With the pointed end forming an acute angle; sharply pointed

Adaxial: On the side toward the axis; the side oriented toward the stem

Adventitious: Usually referring to roots produced from the nodes, often above the ground

Aerial: Not connected to the ground, as in an aerial root anther. Top portion of the stamen, consisting of one or more pollen sacs; the site of pollen formation

Appressed: Pressed closely to or flattened against the stem

Areolate: Bearing areoles

Areole: Specialized axillary bud or short shoot; the spine cushion, producing leaves, spines, and flowers

Aril: Usually a fleshy or corky outgrowth of the funiculus, covering part or all of the seed; compare caruncle, strophiole arillate. With an aril

Armed: With spines or other pointed structures

Articulate: Jointed, divided into segments at each node

Attenuate: With a long, tapering point

Awl shaped: With a narrow, stiff, flattened body that tapers gradually to a point axial. An organ with its axis oriented parallel to the main axis axil. Angle between the upper side of a leaf and the stem; the depression between the tubercles in Mammillaria from which the flowers arise

Axillary: In the axil.

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