Question

Which one is not characteristic feature of asteraceae?
(a) Cypsela fruit
(b) Syngenesious stamens
(c) Ovary bicarpellary superior
(d) Placentation marginal
(e) Head type inflorescence.

• A. a, b only
• B. c and e only
• C. e only
• D. c and d only
• E. b, c and d only

Answer 1

Answer: (D)

c and d only

Asteraceae or Compositae is a large and economically important family of flowering plants. Cypsela fruit (dry single-seeded fruit) is characteristic of Asteraceae. In Asteraceae, the stamens are syngenesious i.e., filaments are free and anthers are united. The ovary is bicarpellary, syncarpous and inferior (petals and sepals are above ovary). Basal placentation (single ovule is attached at the base) is present. The inflorescence is head or capitulum, consisting of a few or a large number of flowers or florets closely arranged on an axis surrounded by involucral bracts.

So, the correct answer is 'c and d only'.