Corolla with four diagonally arranged petals is

Options

A. Vexillary
B. Cruciform
C. Gamopetalous
D. Caryophyllaceous.

Answer

To determine the type of corolla with four diagonally arranged petals, we can analyze the options provided:

1. **Understanding the Question**: The question asks for a specific type of corolla characterized by having four petals arranged diagonally.

2. **Analyzing the Options**:
- **Vexillary**: This type of corolla has five petals, with a specific arrangement of standard, wings, and keel. Therefore, it does not fit our requirement of having four petals.
- **Cruciform**: This type of corolla has four petals arranged in a cross shape, which means they are diagonally arranged. This fits the description given in the question.
- **Gamopetalous**: This refers to a corolla where the petals are fused together, which does not match the requirement of having four distinct petals.
- **Caryophyllaceous**: This type of corolla has five free clawed petals, which again does not match the requirement of having four petals.

3. **Identifying the Correct Answer**: Based on the analysis, the only option that meets the criteria of having four diagonally arranged petals is **Cruciform**.

4. **Conclusion**: Therefore, the correct answer is **Cruciform**.