The plant having monadelphous stamens and axile placentation is

Options

A. lemon
B. pea
C. tomato
D. China rose

Answer

To solve the question regarding the plant that has monadelphous stamens and axile placentation, we can follow these steps:

### Step 1: Understand Monadelphous Stamens
- **Definition**: Monadelphous stamens refer to a condition in flowers where all the filaments of the stamens are fused together to form a single structure or bundle. The anthers, however, remain free and separate.
- **Example**: This structure can be visualized as a tube-like formation where the filaments are united.

### Step 2: Understand Axile Placentation
- **Definition**: Axile placentation is a type of ovule arrangement within the ovary. In this arrangement, the placenta (the tissue to which ovules attach) arises from the central axis of the ovary. The ovules are attached to the septa (the walls dividing the ovary into chambers).
- **Characteristics**: The ovary is syncarpous (composed of multiple carpels) and multi-carpillary (having multiple chambers).

### Step 3: Identify the Plants Listed
- The options given are lemon, pea, tomato, and China rose. We need to determine which of these plants exhibits both monadelphous stamens and axile placentation.

### Step 4: Analyze Each Plant
- **Lemon**: Typically has polyadelphous stamens, not monadelphous.
- **Pea**: Generally has diadelphous stamens, which is different from monadelphous.
- **Tomato**: Usually has free stamens and does not exhibit monadelphous stamens.
- **China Rose**: Known to have monadelphous stamens and axile placentation.

### Step 5: Conclusion
- Based on the definitions and characteristics analyzed, the plant that has monadelphous stamens and axile placentation is **China Rose**.

### Final Answer
The plant having monadelphous stamens and axile placentation is **China Rose**.

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