zygomorphic flower
Quick Summary
A zygomorphic flower is one that is bilaterally symmetrical, meaning it can only be divided into two equal halves by a single plane passing through its axis. This is in contrast to actinomorphic flowers, which are radially symmetrical and can be divided into equal halves by multiple planes.12
Examples of zygomorphic flowers include those found in snapdragons, orchids, and sweet peas. This type of symmetry is often an adaptation to attract specific pollinators, such as bees, which may use a lower lip of the flower as a landing platform. The Zingiberales order of flowering plants, which includes ginger and banana, often features zygomorphic flowers.234
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
symmetrySymmetry in flowers…two equal parts, it is zygomorphic, or bilaterally symmetrical, as in the snapdragon, orchid, and sweet pea.
Read More…two equal parts, it is zygomorphic, or bilaterally symmetrical, as in the snapdragon, orchid, and sweet pea.
Read More
angiospermThe corolla… and is called irregular or zygomorphic (e.g., violets, Viola; Violaceae).
Read More… and is called irregular or zygomorphic (e.g., violets, Viola; Violaceae).
Read More

