Question

The perianth is the term used when:

• A. Androecium and gynoecium are not distinct.
• B. Androecium and calyx are not distinct.
• C. Corolla and gynoecium are not distinct.
• D. Calyx and corolla are not distinct.

Answer 1

The correct option is D Calyx and corolla are not distinct.

Perianth is a collective term for outer parts of calyx and corolla enclosing androecium and gynoecium. This term is used to refer petalideous monocotyledons, in which the calyx and corolla are combined that they cannot be distinguished from each other. Example - Plants of Liliaceae family.
Thus, the correct answer is option D.