In which of the following flowers, no overlapping between the sepals or petals is observed?

Options

A. Cotton
B. Cassia
C. Calotropis
D. China Rose

Answer

To solve the question regarding which flower exhibits no overlapping between the sepals or petals, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Estivation**:
- Estivation refers to the arrangement of petals and sepals in a flower. It describes how these floral parts are positioned relative to each other.

2. **Identify the Types of Estivation**:
- There are four main types of estivation:
- **Valvate**: No overlapping; petals and sepals just touch each other.
- **Twisted**: Regular overlapping; one end of each petal is on the inner side and the other end is on the outer side.
- **Imbricate**: Irregular overlapping; petals overlap but not in a regular manner.
- **Vexillary (or Papilionaceous)**: A specific arrangement seen in legumes with a large standard petal and smaller lateral and keel petals.

3. **Determine the Key Characteristics of Each Type**:
- **Valvate**: No overlap (example: Calotropis).
- **Twisted**: Regular overlap (examples: China rose, Ladyfinger, Cotton).
- **Imbricate**: Irregular overlap (examples: Cassia, Gulmohur).
- **Vexillary**: Specific arrangement in legumes (examples: Pea, Bean).

4. **Identify the Correct Answer**:
- From the types of estivation, the only type where there is no overlapping between the sepals or petals is the **Valvate** type. The example provided for this type is **Calotropis**.

5. **Conclude**:
- Therefore, the flower that shows no overlapping between the sepals or petals is **Calotropis**.

### Final Answer:
The flower in which no overlapping between the sepals or petals is observed is **Calotropis**.

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