Merosity

The Number of floral parts in each whorl ( often leaving out androecium and gynoecium ) of a flower refers to its merosity. Accordingly, the merosity is of the following types:-

1. Trimerous:- In each whorl floral parts are three or in multiples of three.

example: AlliumALLIUM

2. Tetramerous:- In each whorl the floral parts are four or in the multiples of four.

example: BrassicaBRASSICA

3. Pentamerous:- In each whorl the floral parts are five or in the multiples of five.
example: Hibiscus

HIBISCUS