Question:
A weed with short-lived blue coloured flowers is
A weed with short-lived blue coloured flowers is
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Weed identification:
- Commelina benghalensis: Blue flowers (dayflower).
- Cyperus rotundus: Sedge (no flowers).
- Avena ludoviciana: Grass weed.
- Commelina benghalensis: Blue flowers (dayflower).
- Cyperus rotundus: Sedge (no flowers).
- Avena ludoviciana: Grass weed.
Updated On: Aug 27, 2026
- Erigeron canadensis
- Echinochloa colona
- Avena ludoviciana
- Commelina benghalensis
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of weed identification based on floral characteristics.
Step 2: Detailed Explanation:
Commelina benghalensis (dayflower) has short-lived blue-coloured flowers.
The flowers are small, blue, and last only for a few hours.
Erigeron canadensis (A): White/pink flowers.
Echinochloa colona (B): Grass weed (no blue flowers).
Avena ludoviciana (C): Grass weed (no blue flowers).
Thus, Commelina benghalensis has blue flowers.
Step 3: Final Answer:
Thus, the weed with short-lived blue flowers is Commelina benghalensis, which corresponds to option (D).
[0.5cm]
This question tests knowledge of weed identification based on floral characteristics.
Step 2: Detailed Explanation:
Commelina benghalensis (dayflower) has short-lived blue-coloured flowers.
The flowers are small, blue, and last only for a few hours.
Erigeron canadensis (A): White/pink flowers.
Echinochloa colona (B): Grass weed (no blue flowers).
Avena ludoviciana (C): Grass weed (no blue flowers).
Thus, Commelina benghalensis has blue flowers.
Step 3: Final Answer:
Thus, the weed with short-lived blue flowers is Commelina benghalensis, which corresponds to option (D).
[0.5cm]
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