Question

A plant bearing solitary flowers is _________.
A. Brassica campestris
B. Helianthus annuus
C. Hibiscus rosa- sinensis
D. Salvia officinalis

Answer 1

Flower may occur singly or in groups. A specialized branch, which bears a group of flowers is known as the peduncle. A flattened peduncle is called the receptacle. The arrangement and distribution of flowers on the inflorescence axis are called an inflorescence.

Complete answer: Flowers may occur singly or in groups. A specialized branch, which bears a group of flowers is known as the peduncle. A straightened peduncle is called a receptacle. The arrangement and distribution of flowers on the inflorescence axis (or peduncle or mother axis) are called an inflorescence. A modified shoot which is specialized to bear flowers is also known as inflorescence.
i. Solitary terminal: Flowers grow separately on the tip of fundamental stem or branches e.g., Poppy.
ii. Solitary axillary: Single flower developing in the axil of the leaf e.g., Petunia, Hibiscus rosa-sinensis. Inflorescence can be racemose, cymose, and specialized.
So, the correct answer is option C-Hibiscus rosa-sinensis

Note: The flower is the part of the plant which develops into fruits and seeds and thus helps in forming new offspring of the plant. Flowers often arise in the axial of the small leaf-like structure called a bract. A flower having bract is known as bracteates and a flower without it is ebracteate. The swollen tip of the pedicel (stalk of the flower) is known as the thalamus or receptacle. It bears four types of floral organs- sepals (collectively known as calyx), petals(corolla), stamens(androecium), and carpels(gynoecium).