Question

A head inflorescence is subtended by
(A) Many members of epicalyx
(B) An involucre
(C) Numerous sepals
(D) Petaloid bracts

Answer 1

Hint: Inflorescence is the cluster of the flower head in the plants including the parts of stem, flowers, bracts and the stalks. It is the part of the stem that is modified by the flowers. It is differentiated from the flower in such a way that many flowers are arranged on the single stem.

Complete answer:
Bracts that show up in a whorl subtending an inflorescence are on the whole called an involucre. An involucre is a typical element that is present below the inflorescences of numerous plants that belonged to the class Apiaceae, Asteraceae, Dipsacaceae and Polygonaceae.

Each blossom in an inflorescence may have its own whorl of bracts, for this situation is called an involucre. Numerous asteraceae plants have bracts at the base of every inflorescence. The term involucre is likewise utilized for an exceptionally obvious bract or bract pair at the base of an inflorescence. In the family Betulaceae, the involucre is a verdant structure that ensures the creation of nuts. Hence a head inflorescence is subtended by the involucre.

Hence, the correct answer is option (B)

Note: The stem in which it carries the inflorescence is called a peduncle and the axis that holds the flowers in one or more branches inside the inflorescence is called the rachis. The stalk which carries each single flower is called the pedicel. The other flower that is not included in an inflorescence is called a solitary flower and the stalk it belongs to is also referred to as a peduncle.