Maturation of stigma and anthers at different times in the same flower is

Options

A. Heterostyly
B. Dichogamy
C. Dicliny
D. Herkogamy.

Answer

To solve the question regarding the maturation of stigma and anthers at different times in the same flower, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- The question asks for a specific term that describes the maturation of stigma and anthers at different times within the same flower.

2. **Analyzing the Options**:
- The first option is **heterostyle**, which refers to flowers having different lengths of styles and stamens but does not directly relate to the timing of maturation.
- The second option is **dichogamy**, which specifically refers to the maturation of male (anthers) and female (stigma) parts at different times. This is a key term to focus on.
- The third option is **diclini**, which refers to unisexuality in flowers and does not pertain to timing.
- The fourth option is **hercogamy**, which involves mechanical devices preventing self-pollination but again does not relate to timing.

3. **Identifying the Correct Term**:
- Since the question is about the timing of maturation of stigma and anthers, the correct term is **dichogamy**. This term encompasses the idea that either the male or female parts mature first, leading to cross-pollination rather than self-pollination.

4. **Types of Dichogamy**:
- Dichogamy can be further classified into:
- **Protandry**: where the anthers mature before the stigma (e.g., sunflower, salvia).
- **Protogyny**: where the stigma matures before the anthers (e.g., Plantago, 4 o'clock plant).

5. **Conclusion**:
- The answer to the question is **dichogamy**, as it accurately describes the maturation of stigma and anthers at different times in the same flower.

### Final Answer:
**Dichogamy**