Calyx is the most essential part because it protect the flower
Pistil and stamen .
Flowers are important in making seeds. Flowers can be made up of different parts, but there are some parts that are basic equipment. The main flower parts are the male part called the stamen and the female part called the pistil.
The sterile leaves of the flower are the sepals and the petals.
Petal, Stigma, Style, Ovary Ovule, Receptacle, Flower stalk, Nectary, Sepal, Filament ,Anther
It is called the stamen which consists of the filaments, anthers and the pollen grains
Calyx is the most essential part because it protect the flower
Accessory whorls are extra floral parts found in some plant species that are located outside of the typical floral organs like sepals, petals, stamens, and pistils. These additional whorls can include structures like bracts, bracteoles, or extra sepals. They are not essential for reproduction but can serve functions like attracting pollinators or providing protection for the flower.
In monocots, flowers are trimerous (number of flower parts in a whorl in threes). In dicots the flowers are tetramerous or pentamerous (flower parts are in fours or fives).
This process is called pollination. Bees transfer pollen from the male parts of one flower to the female parts of another flower, which is essential for fertilization and seed production in many plants.
Pistil and stamen .
The nonessential flower parts include the flower stalk, sepals and petals. The essential flower parts are those necessary for reproduction, the stamen and pistil.
The main function of flower is formation of seeds by sexual reproduction. Anthers and Carples are main parts for this purpose and sepals and petals being protective and attractive parts are called accessory parts.
The accessory parts are; 1. Petals 2. Sepals 3. Receptacles the essential parts are; 1. Stamen 2. Pistil
The female parts of a flower are called style, ovary, ovule and stigma. All of these parts together are called the pistil.
The collective term for the male parts of a flower is called the stamen. This comprise of the anthers and the filament.
the Gynoecium (meaning "womans house") and refers to all the ovule producing parts of the flower. See related link
No, a China rose (hibiscus) is not a complete flower as it lacks some essential parts like stamens and pistils. It is considered an incomplete flower because it is missing either male or female reproductive structures.