A pistillate flower does not possess------
A. Corolla
B. Androecium
C. Calyx
D. Gynoecium

Hint: Flower is the reproductive part of the angiosperms. A flower is also called the bloom or blossom.

Complete Answer:
A pistillate flower is a female flower which consists of Corolla (petals), Calyx (sepals), and pistils (gynaecium).
(I) Corolla – Corolla represents the brightly coloured petals. The bright colour of petals attract flies towards it which help in the pollination of these flowers.
(II) Calyx –Calyx is the outermost whorl. Calyx is made up of green coloured leaf like structures.
(III) Pistil - Pistils are the female reproductive structures of plants.It produces female germ cells i.e. egg cells. Pistil consists of three structures. That is – Stigma, Ovary, Style.
- Stigma: Stigma is a pollen landing surface. It is very sticky and has various shapes.
- Style: Style is a stalk that arises from the ovary. It is a tube that joins stigma to ovary by which pollen grains come to the ovary.
- Ovary: Ovary represents the swollen base of the pistil. It contains the ovules that will become the seeds later after reproduction.

Additional information:
- Androecium represents the male reproductive unit. An androecium is also called as the Stamen.
- The androecium produces the male germ cells that are called as the pollen grains.
- Stamen consist of a filament and anther. Filament is a stalk and anther consisting of pollen grains.

Hence, option B is the correct answer for this question.

Note: The plants that have separate male and female flowers occurring on the same plant are called monoecious. Plants that contain male and female flowers separately on different plants are called dioecious.