Flower - Types

Description:

Types of flowers on the basis of symmetry

• Actinomorphic − Radial symmetry i.e. when a flower can be divided into two equal halves in any radial plane through the centre. E.g. Mustard.

• Zygomorphic − Bilateral symmetry i.e. when a flower can be divided into two similar halves only in one plane. E.g. Pea.

• Asymmetric − Irregular i.e. flower cannot be divided into two similar halves by any vertical plane passing through the centre. E.g. Canna.

Types of flowers on the basis of position of whorls

• Hypogynous − Gynoecium occupies the highest position while the other parts lie below it. Ovary is superior. E.g. Mustard, china rose.

• Perigynous − Gynoecium is present at the centre and other parts are located at the rim all almost at the same level. Ovary is half inferior. E.g. Plum, peach.

• Epigynous − The margin of thalamus encloses the ovary and fuses with it. Other parts arise over the ovary. Ovary is inferior. E.g. Guava, cucumber.