A monothecous stamen has

Options

A. Small anther
B. Sterile anther
C. One lobed anther
D. One chambered anther

Answer

To solve the question regarding a monothecous stamen, we will analyze the characteristics of the stamen and its anther.

### Step-by-Step Solution:

1. **Understanding Monothecous Stamen**:
- A monothecous stamen is defined as having a single anther that is not divided into lobes.

2. **Identifying the Structure of the Anther**:
- The anther of a monothecous stamen is typically described as being one-lobed. This means it has a single lobe that contains pollen.

3. **Pollen Chambers**:
- The one-lobed anther in a monothecous stamen contains two pollen chambers. This is an important characteristic that distinguishes it from other types of stamens.

4. **Comparison with Other Types of Stamens**:
- In contrast, a diethicous stamen has two lobes and contains four pollen chambers, which is referred to as tetrasporangiate.
- The sterile anther is found in staminodes, which are non-functional stamens, and does not apply to the monothecous stamen.

5. **Conclusion**:
- Based on the characteristics outlined, the correct answer to the question is that a monothecous stamen has a "one-lobed anther".

### Final Answer:
A monothecous stamen has a **one-lobed anther**.

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