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Term Definition
Actinomorphic A plant structure capable of being divided, in more than one plane, into two equal parts that are mirror images of one another; this term is most often used to refer to flowers.
Actinomorphic flower A flower, capable of being divided, by more than one line passing through the middle of the flower, into two equal parts that are mirror images of one another; e.g., in (Lecythidaceae), species of Myrtaceae, and species of Rubiaceae. Same as polysymmetric, radially symmetrical, and regular flowers and opposite of zygomorphic, monosymmetric, bilateral, and irregular flowers. This term can refer to other plant parts as well. Flower of Gustavia brachycarpa. Photo by R. Aguilar.
Androecium actinomorphic Capable of being divided in more than one plane into two or more equal halves; usually, but not always, used to describe flowers. The major types of actinomorphic and zygomorphic flowers of Neotropical Lecythidaceae. Drawings by B. Angell.