Question

Elongated peduncle bearing pedicellate flowers continuously in acropetal order is?
 A. Corymb
B. Umbel
C. Raceme
D. Head

Answer 1

Hint: Peduncle is the stalk bearing a flower or fruit, or the main stalk of an inflorescence. Acropetal order is the arrangement of plant flowers on the plant's pedicel in the manner in which the new flowers and new buds are at the apex whereas the relatively older flowers are placed at the base.

Complete Answer:
A. Corymb in which the main axis is short. Lower flowers have long pedicels than upper ones so that all the flowers are brought more or less to the same level. It is a type of racemose inflorescence.
B. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. It is a type of racemose inflorescence.
C. Raceme in which elongated peduncle has bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence.
D. Capitulum or head in which the main axis becomes flat and called receptacle. It bears many sessile and small florets. It is a type of racemose inflorescence.

So, the correct answer is 'Raceme'.

Note: Raceme is a simple type of racemose inflorescence. In this type of arrangement unbranched, elongated, peduncle bearing pedicellate or stalked flowers acropetally, eg, Delphinium, Raphanus, Lunaria and Lupinus.