Which is not true about the series Heteromerae in Bentham and Hooker's system?

Options

A. Always bicarpellary condition
B. Ovary usually superior
C. Stamens are as many as corolla lobe
D. It includes three cohorts

Answer

To determine which statement is not true about the series Heteromerae in Bentham and Hooker's system, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understand the Series Heteromerae**:
- The series Heteromerae is a classification within the Bentham and Hooker system of plant taxonomy. It is characterized by specific floral structures.

2. **Analyze the Options**:
- **Option 1**: "Always bicarbillary condition."
- In the context of Heteromerae, it is known that this group does not always exhibit a bicarbillary condition. This suggests that this statement is likely incorrect.

- **Option 2**: "Ovary is usually superior."
- In Heteromerae, the ovary is indeed typically superior. This statement is true.

- **Option 3**: "Stamens are as many as corolla lobes."
- This is also a characteristic of Heteromerae, where the number of stamens matches the number of corolla lobes. This statement is true.

- **Option 4**: "Includes three corolla lobes."
- Heteromerae can include plants with three corolla lobes. This statement is true as well.

3. **Identify the Incorrect Statement**:
- Based on the analysis, the first option stating "Always bicarbillary condition" is not true for the series Heteromerae in the Bentham and Hooker system.

4. **Conclusion**:
- The correct answer to the question "Which is not true about the series Heteromerae in Bentham and Hooker's system?" is **Option 1: Always bicarbillary condition**.