Strobilanthus kunthiana flowers once in

Options

A. 5 years
B. 12 years
C. 20 years
D. 50 years.

Explanation

**Step-by-Step Text Solution:**

1. **Introduction to Strobilanthus kunthiana**: Strobilanthus kunthiana, commonly known as Neelkurinji, is a flowering plant found in India, particularly in Tamil Nadu.

2. **Flowering Frequency**: This plant is notable for its unique flowering cycle, as it flowers only once every 12 years.

3. **Tourist Attraction**: The blooming of Strobilanthus kunthiana is a significant event, attracting many tourists due to the stunning sight of the mountains covered in blue flowers during its flowering period.

4. **Phases of Growth**: The life cycle of Strobilanthus kunthiana can be divided into three main phases:
- **Vegetative Phase**: This is the initial phase where the plant grows and matures. It is also referred to as the juvenile phase.
- **Reproductive Phase**: After a long vegetative phase, the plant enters the reproductive phase where it produces flowers, seeds, or fruits.
- **Senescent Phase**: This is the final phase where the plant ages and eventually dies.

5. **Duration of Vegetative Phase**: For Strobilanthus kunthiana, the vegetative phase lasts approximately 12 years. After this extended period of growth, the plant transitions into the reproductive phase, leading to its flowering.

6. **Conclusion**: Therefore, Strobilanthus kunthiana flowers once every 12 years due to its lengthy vegetative phase before it can reproduce.

**Final Answer**: Strobilanthus kunthiana flowers once in 12 years.

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