Which of these properties of cassia is correct ?

Options

A. It has a zygomorphic flower and imbricate aestivation of petals
B. It has an actinomorphic flower and imbricate aestivation of petals
C. It has a zygomorphic flower and twisted aestivation of petals
D. It has an actinomorphic flower and twisted aestivation of petals

Answer

To solve the question regarding the properties of Cassia, we need to analyze each option provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding Zygomorphic Flowers**:
- A zygomorphic flower is one that exhibits bilateral symmetry. This means it can be divided into two equal halves by only one plane.
- **Hint**: Remember that zygomorphic flowers are symmetrical in one direction only.

2. **Identifying Imbricate Estivation**:
- Imbricate estivation refers to the arrangement of petals where they overlap irregularly. This is a specific type of flower petal arrangement.
- **Hint**: Think of how petals overlap in a way that they do not follow a regular pattern.

3. **Evaluating the Options**:
- **Option 1**: Zygomorphic flower and imbricate estivation. This option is correct as Cassia flowers are indeed zygomorphic and exhibit imbricate estivation.
- **Option 2**: Actinomorphic flower. This is incorrect because Cassia flowers are not radially symmetrical.
- **Option 3**: Zygomorphic flower but twisted estivation. This is incorrect because while the flower is zygomorphic, it does not have twisted estivation.
- **Option 4**: Actinomorphic flower and twisted estivation. This is also incorrect for the same reasons as above.

4. **Conclusion**:
- Based on the analysis, the only correct property of Cassia is found in **Option 1**, which states that it has a zygomorphic flower and exhibits imbricate estivation.

### Final Answer:
The correct property of Cassia is that it has a zygomorphic flower and exhibits imbricate estivation (Option 1).