Question

In a plant the peduncle is elongated and it bears pedicellate flowers. The older flowers lie towards the base and the younger ones near the apex. The growth of the peduncle continues and more flowers are added. The inflorescence is
A)Racemes
B)Corymbs
C)Umbel
D)Head

Answer 1

Hint: It is a type of inflorescence in which the axis of the inflorescence has limitless growth. In this type of inflorescence, flowers are arranged in an acropetal manner. Thus, the older flowers are present at the base whereas the younger ones present were the top.

Complete answer:
-The growing region at the tip of the flower stalk continues to produce new flower buds during growth in the racemose inflorescence. As a result, the youngest flowers are at the top and the oldest flower at the base of the stalk.
Characteristic features
-In the Racemose inflorescence the main axis is called a peduncle and the growth of the main axis is indefinite and produce flower buds
-Peduncle is monopodial in nature.
-Flowers grouping is less common.
-Flowers are born laterally in acropetal succession. Older flowers are at the base and younger ones are at the top.
-The newly formed fruits are not protected by the flowers.
-The pedicle seldom always terminates in a flower.

Additional Information: -On the basis of the growth of the main axis, the racemose inflorescence is mainly divided into different types -
Raceme- in these flowers are arranged in an acropetal manner with the pedicel
Spike-when flowers without pedicel arranged in an acropetal manner.
Spadix-when the spike is covered by a sheet-like covering by a spathe it becomes a spadix.
Spikelets-under this inflorescence is a spikelet that may bear one to several flowers.

Racemose inflorescence based on shortened main axis divided into
Corymb-in this, the size of the lower flower is more than the size of the upper ones. Therefore, flowers are arranged at the same level.
Umbel- in this the pedicellate flowers originates from the same place and reaches the same level
-Head - When the head of the peduncle is flattened and the flowers are attached directly to it in a raceme.
So, the correct answer is, "Racemes".

Note: -When flowers are arranged in an orderly manner on the plant or on their stem is known as an inflorescence.
-The axis of the inflorescence has a limitless growth then it is known as Racemose inflorescence. In this type of inflorescence, flowers are mainly arranged in an acropetal manner
-the individual flowers may be sessile or pedunculated.