Question:
Which of the following genera belong to marginal plants and suitable for planting in water gardens?
(A). Azolla caroliniana
(B). Acorus calamus
(C). Cyperus alternifolius
(D). Elodea canadensis
Choose the correct answer from the options given below:
Which of the following genera belong to marginal plants and suitable for planting in water gardens?
(A). Azolla caroliniana
(B). Acorus calamus
(C). Cyperus alternifolius
(D). Elodea canadensis
Choose the correct answer from the options given below:
(A). Azolla caroliniana
(B). Acorus calamus
(C). Cyperus alternifolius
(D). Elodea canadensis
Choose the correct answer from the options given below:
Show Hint
Marginal plants are essential in water gardens to soften pond borders and absorb excess nutrients, which helps control algal blooms.
Updated On: Jul 10, 2026
- (A) and (C) only
- (A) and (D) only
- (B) and (C) only
- (C) and (D) only
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Aquatic plants are classified into four main groups based on their growth habit in water gardens:
Floating plants: Float freely on the water surface (e.g., Azolla, Pistia).
Submerged plants: Grow entirely underwater (e.g., Hydrilla, Elodea).
Deep-water plants: Rooted in bottom soil with leaves floating on the surface (e.g., Nymphaea).
Marginal plants: Rooted in shallow water or wet soil along the pond margins (e.g., Acorus, Cyperus).
Step 2: Detailed Explanation:
- Acorus calamus (Sweet Flag): A marginal plant that thrives in wet soils and shallow water depths of 5-10 cm along pond edges.
- Cyperus alternifolius (Umbrella Palm): A hardy marginal plant with radiating leaves that is grown in shallow water zones.
- Azolla caroliniana: A free-floating aquatic fern.
- Elodea canadensis: An oxygenating submerged water plant.
Step 3: Final Answer:
The marginal plants are Acorus calamus and Cyperus alternifolius.
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