Which of the following plants exhibits unusual flowering phenomenon -

Options

A. Mango and Litchi
B. Mango and Maize
C. Litchi and Pea
D. Bamboo species and Strobilanthus species

Answer

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks which plant exhibits an unusual flowering phenomenon.

2. **Analyze the Options:**
- **Option 1: Mango and Lychee** - Both of these plants have a regular flowering pattern, typically flowering annually. Therefore, they do not exhibit unusual flowering.
- **Option 2: Lychee and Pea** - Similar to mango and lychee, these plants can flower up to two times a year, which is still considered a usual flowering pattern.
- **Option 3: Bamboo Species** - Bamboo is known for its unusual flowering phenomenon. Some species of bamboo flower only once every 12 years, and some even take up to 50 to 100 years to flower.
- **Option 4: Strobilanthes kunthiana** - This plant, also known as Neelakurinji, flowers once every 12 years, which is another example of an unusual flowering pattern.

3. **Conclusion:** Since both bamboo species and Strobilanthes kunthiana exhibit unusual flowering phenomena (flowering infrequently over long periods), the correct answer is that these plants show unusual flowering.

4. **Final Answer:** The correct answer is the bamboo species and Strobilanthes kunthiana.

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