Question

Verticillaster inflorescence is the characteristic of the family
A. Cucurbitaceae
B. Rubiaceae
C. Labiatae
D. Asteraceae

Answer 1

Hint: An arrangement of flower in the form of whorl and the tip grows in a way to produce more whorls.

Complete answer:
Verticillaster is a special type of inflorescence seen in the family Labiatae. The leaves emerge oppositely, each pair at right angles to the previous ones or whorled.

Additional information
- The arrangement of the group of the flowers on the stem having a complicated arrangement of the branches or the main branch is known as the inflorescence.
- The Labiatae or Lamiaceae is a family of flowering plants commonly known as the mint or sage family.
- In Verticillaster inflorescence at each node of the stem, two axillary opposite cymose inflorescence develops on either side.
- In cymose inflorescence, the flowers are present at the Alex of the flower axis.
- Determining simple inflorescence is generally cymose. The cyme inflorescence is the main type of cymose.
- The cyme in the axil of the leaves starts as a dichasial (two secondary axis) but turns into a monochasial cyme (one secondary axis).
- At each node, there is a cluster of flowers surrounding the stem.

So, the correct answer is ‘Labiatae’.

Note: In the Cucurbitaceae family, the inflorescence is axillary solitary as the flower is single and present in the leaf axil. In the family Rubiaceae thyrse inflorescence is found in which the main axis grows indeterminately. In the Asteraceae family, the capitulum is the characteristic inflorescence.