Vexillary aestivation is not found in the flowers of

Options

A. Dolichos
B. Indigofera
C. Cassia
D. Trigonella

Answer

To solve the question about which flower does not exhibit vexillary aestivation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Estivation**:
- Estivation refers to the arrangement of floral parts, particularly the calyx (sepals) and corolla (petals) in a flower bud before it opens.

2. **Identify Vexillary Aestivation**:
- Vexillary aestivation is characterized by a specific arrangement where the largest petal (the standard) covers the two lateral petals (the wings), which in turn cover the smallest petal (the keel). This is a unique arrangement found in certain flowering plants.

3. **Examine the Given Options**:
- The options provided are:
- A) Jollicos
- B) Indigofera
- C) Kezia
- D) Trigonella

4. **Determine Which Options Exhibit Vexillary Aestivation**:
- **Jollicos**: Exhibits vexillary aestivation.
- **Indigofera**: Exhibits vexillary aestivation.
- **Trigonella**: Exhibits vexillary aestivation.
- **Kezia**: Does not exhibit vexillary aestivation; instead, it has imbricate aestivation where the petals overlap without a specific direction.

5. **Conclude the Answer**:
- Since Kezia does not have vexillary aestivation and the other options do, the correct answer to the question is **C) Kezia**.