If stamens are arranged in two whorls with antipetalous outer whorl , then the condition is

Options

A. Obdiplostamenous
B. Diplostamenous
C. Didynamous
D. Epiphyllous

Answer

To solve the question regarding the arrangement of stamens in two whorls with an antipetalous outer whorl, we will analyze the provided options and definitions step by step.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- The term "antipetalous" refers to the arrangement of stamens that are positioned opposite to the petals of the flower.
- The flower has two whorls of stamens: an outer whorl and an inner whorl.

2. **Identifying the Arrangement**:
- In this case, the outer whorl of stamens is described as "antipetalous," meaning that these stamens are located directly opposite the petals.
- The inner whorl of stamens will be positioned alternately with the petals.

3. **Analyzing the Options**:
- **Ophdiplostaminous**: This condition describes a situation where the outer whorl of stamens is opposite to the petals (antipetalous condition).
- **Diplostaminous**: In this condition, the outer whorl of stamens is arranged alternately with the petals, not opposite.
- **Didynamous**: This condition involves four stamens in one whorl, where two are longer and two are shorter, which does not fit our description.
- **Epiphyllous**: This condition refers to stamens that arise from the leaves, which is not relevant to the arrangement described in the question.

4. **Conclusion**:
- Based on the definitions and the arrangement described, the correct answer is **Ophdiplostaminous**. This is the condition where the stamens are arranged in two whorls, with the outer whorl being antipetalous.

### Final Answer:
The condition is **Ophdiplostaminous**.