Describing flowers that have petals of unequal size or shape.
From Greek 'anisos' (unequal) + 'petalon' (petal) + '-ous' (adjective suffix). Botanists developed this term in the 1800s to describe petal arrangements in flowers.
Many wildflowers and ornamental plants have this 'unbalanced' look intentionally—irregular petals help guide pollinators into the flower like an arrow pointing to the nectar!
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