Understanding Cotyledonous Plants: Definition and Functions

Cotyledonous is an adjective used to describe plants that have seed leaves, also known as cotyledons, which are different from the true leaves of the plant. These seed leaves typically have a different shape and structure than the true leaves, and they often have a different function as well.

In angiosperms (flowering plants), the cotyledons are the first leaves to emerge from the seed after germination. They are usually flat and broad, with a simple shape, and they often have a distinctive shape or color that helps to distinguish them from the true leaves. The cotyledons serve as a food storage organ for the developing embryo within the seed, providing nutrients until the plant's roots and true leaves are able to photosynthesize.

In some plants, such as beans and peas, the cotyledons are not visible above ground, but in other plants, such as sunflowers and daisies, the cotyledons are clearly visible as the first set of leaves to emerge from the seed.

Overall, the term "cotyledonous" is used to describe plants that have seed leaves, or cotyledons, that are distinct from their true leaves.