Question

Which of the following features is absent in the family asteraceae?
A. Cypsela fruit
B. Capitulum inflorescence
C. Hypogynous flower
D. Syngenesious anthers
E. Pappus calyx

Answer 1

Hint: The Asteraceae family is also known as the Compositae family. It is also known as the composite family of order Asterales. Dahlia, Marigold, lettuce and sunflower are some members of this family. The flower petals in The Asteraceae family are joined by their margins.

correct explanation:
Option A: Cypsela fruit
Cypsela fruit is the characteristic of the Asteraceae family. A single-seeded Cypsela fruit is generated from a double ovary and has one seed. One of these ovaries develop into seed. The seed of the sunflower is an example of cypsela fruit. It can also be seen in the dandelions.
Option A is not correct.
Option B: Capitulum Inflorescence
The Asteraceae family's Capitulum Inflorescence is a distinctive feature. In this type of Inflorescence, all the flowers are attached on a receptacle which is surrounded by bracts. The flowers in the Compositae family have composite flowers which are flower-like Inflorescence. This is where this family gets the name Compositae from.
Option B is not correct.
Option C: Hypogynous flower
The flowers in the family asteraceae are not Hypogynous flowers. They are epigynous flowers. In an epigynous flower, all floral parts are divergent from the ovary and all floral parts are conjoint. Brinjal, mustard and china rose have hypogynous flowers. Perigynous flower is seen in ross and plum.
Option C is correct
Option D: Syngenesious anthers
Syngenesious anthers are a characteristic of the Asteraceae family. Syngenesious condition is also known as synandrous. In this condition stamens are fused together with the help of their anthers only. The fused anthers are arranged in the form of a circle around the gynoecium. This type of arrangement of another can be clearly seen in Marigold and sunflower.
Option D is not correct
Option E: Pappus calyx
Pappus calyx is the characteristic feature of the Asteraceae family. Pappus is actually a modified calyx. The Pappus may be absent or present in some members. It may be composed of bristles, scales or awns that are attached to the seeds.

So, Option C is the correct answer

Note:
The members of Asteraceae have flowers that are made up of many florets and are surrounded by bracts. The sepals are reduced and they form Pappus over mature fruit. Fruits that have one seed, also called achenes, have a hard outer covering.