Which of these is an example for zygomorphic flower with imbricate aestivation ?

Options

A. Canna
B. Cassia
C. Cucumber
D. Calotropis

Answer

To solve the question "Which of these is an example of a zygomorphic flower with imbricate aestivation?", we will follow these steps:

### Step 1: Understand the Terms
- **Zygomorphic Flower**: A flower that can be divided into two symmetrical halves along one plane only. This means it has bilateral symmetry.
- **Imbricate Aestivation**: A type of flower bud arrangement where the petals overlap each other like roof tiles.

### Step 2: Analyze the Options
We have four options to consider:
- **Option A: Canna**
- **Option B: Cassia**
- **Option C: Cucumber**
- **Option D: Calotropis**

### Step 3: Identify Zygomorphic Flowers
Among the options, we need to identify which ones are zygomorphic:
- **Canna**: Typically has actinomorphic flowers (radial symmetry).
- **Cassia**: Known for having zygomorphic flowers.
- **Cucumber**: Generally has actinomorphic flowers.
- **Calotropis**: Also has actinomorphic flowers.

### Step 4: Check for Imbricate Aestivation
Now, we need to check which of the identified zygomorphic flowers has imbricate aestivation:
- **Cassia**: This flower exhibits imbricate aestivation, where the petals overlap in a specific manner.

### Step 5: Conclusion
Based on the analysis, the flower that is both zygomorphic and has imbricate aestivation is **Cassia** (Option B).

### Final Answer
**The correct answer is Option B: Cassia.**

---