DENDROLOGY

Detailed explanation-1: -The middle part of the pistil is called style . It is a tube which connects the stigma to ovary. It allows pollen grains to go down to the ovary.

Detailed explanation-2: -The female elements are collectively called the pistil. The top of the pistil is called the stigma, which is a sticky surface receptive to pollen. The bottom of the pistil contains the ovary and the narrowed region in between is called the style.

Detailed explanation-3: -The style is the tube-like structure that supports the stigma. The style leads down to the ovary which contains the ovules. During the process of pollination, pollen moves from the male parts to the female parts. Pollen grains land on the stigma and a tiny tube grows from it and down the style into the ovary.