Petals are flowers (Flower ['flau? ]) is an integral part of the corolla, the interior of the perianth and the asexual part of the flower. The interior of perianth is generally divided into petals and calyx, but some flowers are very similar to calyx, so they are collectively called petals. The petals of typical flowers are very bright in color and shape, and they surround the reproductive organs of flowers.
The number of petals is often a sign of flower classification: dicotyledonous plants generally have four or five petals, while monocotyledonous plants generally have three or three petals in multiples. Petals (flower plates) can protect the inside of flowers, or nectaries can secrete nectar and produce sugary nectar to attract insects.
Morphological characteristics:
Biologically, petals are flaky bodies located on the inner surface of calyx to form corollas.
The petals of angiosperms have many shapes and colors. Some petals are connected together at the base to form a flower tube, and the whole perianth of some flowers forms a flower cup around the gynoecium. The petals of some plants have degenerated or completely disappeared, such as many grasses.
Petals are generally the most conspicuous part of a flower, and the distribution of petals or the structure of the whole perianth is either radioactive or symmetrical. The petal shape and size of the former are basically similar, while the petal shape and size of the latter can be very different, and the petals of orchids are symmetrical.