When the stamens are united throughout their whole length by filaments and anthers the condition is known as

Options

A. synandrous
B. syngenesious
C. diadelphous
D. monadelphous

Answer

To solve the question, "When the stamens are united throughout their whole length by filaments and anthers, the condition is known as," we need to analyze the options provided and understand the definitions of the terms related to the fusion of stamens.

### Step-by-Step Solution:

1. **Understanding Stamens**: The stamen is the male reproductive part of a flower, consisting of the filament and the anther. The filament is the stalk that supports the anther, which produces pollen.

2. **Identifying the Condition**: The question asks for a condition where both the filaments and anthers are fused together throughout their entire length.

3. **Analyzing the Options**:
- **Synandrous**: This term refers to a condition where both the filaments and anthers are fused together. This matches the description in the question.
- **Synangeneous**: In this condition, the anthers are fused, but the filaments are free. This does not fit the question.
- **Didelphous**: This condition describes a situation where the anthers are free, while the filaments are either partly or fully fused. This also does not match the question.
- **Monodelphous**: In this condition, the filaments are fused into a single bundle, but the anthers are free. This does not fit the requirement of the question.

4. **Conclusion**: The correct answer to the question is **Synandrous**, as it is the only option where both the filaments and anthers are united throughout their whole length.

### Final Answer:
The condition where the stamens are united throughout their whole length by filaments and anthers is known as **Synandrous**.