actinomorphic


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actinomorphic

(of regular flowers) divisible into two or more planes to give identical halves. In animals such a structure is described as radially symmetrical (see RADIAL SYMMETRY).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Many studies have proposed that actinomorphic flowers are primitive and zygomorphy evolved from an actinomorphic ancestor under selection to increase pollination accuracy (Sargent, 2004; Gong & Huang, 2009).
macropetala have helicoiform actinomorphic green corollas, spirally twisted petals, and the stamens are exposed.
Isolated flowers, presumably bisexual, actinomorphic. Calyx unknown.
flowers of Lamiaceae or Fabaceae actinomorphic descriptive term for flower symmetry, means radially symmetrical, e.g.
Flowers are actinomorphic and five sided, with two whorls of four to six anthers borne on slender filaments (Eckert and Barrett 1994c).
Each flower is characterized by an actinomorphic, pentamerous perianth composed of a whorl of sepals and a whorl of petals, a haplostemonous androecium with antesepalous stamens, and a bicarpellate gynoecium; the styles of the flowers are fused to free, and the single stigma is capitate.
The bowl shaped corolla is subsessile, pedicel 1-2 mm long; sepal 5, connate at the base, 5 to 10 x 2 to 4 mm; corolla 5, gamopetalous, actinomorphic, isostemone, epipetalous stamens, alternate with the corolla lobes, ovary bicarpelar, superior, 1 to 2 ovules/locule.
Plant terrestrial or saxicolous, rosulate herbs, forming large colonies, flowering 0.80-1.6 m tall, the rosettes actinomorphic to slightly zygomorphic in mature plants, 40-80 cm diameter.
The white to pink flowers are actinomorphic, hermaphroditic, and slightly protandrous.
Flowers of this species are atypical of heterostylous species in being nontubular and actinomorphic, with the long- and mid-level organs projecting well beyond the hypanthium.