Question

In china rose, the inflorescence is
A. Cymose
B. Capitulum
C. Racemose
D. Solitary chyme

Answer 1

Inflorescence is an arrangement of clusters of flowers on the main stem. The stem that is the base of the inflorescence is known as the peduncle. China rose or Hibiscus belongs to the Malvaceae family. China rose is a bisexual flower containing both stamen and pistil.

Complete answer: Types of the inflorescence are as follows:

1. Racemose inflorescence: In this type of inflorescence, the main axis grows indefinitely and produces flower buds. The monopodial peduncle is present. Older flowers are present at the base and younger ones are present at the tip of the peduncle. This type of succession is known as acropetal succession. An arrangement such as younger flowers present at the centre and the older ones at the periphery is known as the centripetal arrangement of flowers. The racemose inflorescence is also known as indefinite or indeterminate inflorescence. Types of the racemose inflorescence are raceme, spike, spikelet catkin, spadix, corymb, umbel and capitulum. The racemose inflorescence can be seen in mustard, snapdragon, mango wheat, barley, crowngrass, mulberry, coconut, cauliflower, sunflower, etc.
2. Cymose inflorescence: In this type of inflorescence, the main axis does not grow indefinitely, rather a flower is present terminally. Older flowers are present at the terminal end and the younger ones are present at the base, i.e. basipetal succession is present. The arrangement such as older flowers in the middle and young flowers at the periphery is known as centrifugal arrangement. The type of cymose inflorescence is monochasial, dichasial cyme, polyaxial chyme and cymose capitulum. Examples are sundew, Begonia , jasmine, tea, Calotropis acacia , Mimosa and China rose. A hypanthium cup-shaped structure is formed by the main axis. This structure has both male and female flowers.
   Hence, the correct answer is option A.

Note: In the cyathium type, an involucre of bracts produces a cup-shaped structure. A single female flower at the centre is surrounded by male flowers. For example, Euphorbia. While in verticillaster type, two opposite axils of leaves produce two clusters of sessile flowers. For example, Salvia.