One simple leaf arises at each node and one flower is produced at the tip of each branch of peduncle in the following genera respectively

Options

A. China rose, China rose
B. China rose, Datura
C. Mustard, Solanum
D. Hamelia, China rose

Answer

To solve the question regarding which genera exhibit the characteristic of having one simple leaf at each node and one flower produced at the tip of each branch of the peduncle, we can follow these steps:

### Step 1: Understand the Terms
- **Node**: The part of a plant stem from which leaves or branches arise.
- **Peduncle**: The stalk that supports a flower or cluster of flowers.
- **Inflorescence**: The arrangement of flowers on a plant.

### Step 2: Identify Types of Inflorescence
- **Racemose Inflorescence**: The main floral axis continues to grow, with flowers developing laterally along the axis.
- **Simos Inflorescence**: The main floral axis stops growing when a flower develops at the apex, resulting in solitary flowers.

### Step 3: Analyze the Genera Options
- We need to find genera that have:
- One simple leaf at each node.
- One flower at the tip of each branch (solitary flower).

### Step 4: Evaluate the Given Options
1. **Mustard (Brassicaceae)**: Exhibits a simos inflorescence with solitary flowers at the apex and one leaf per node.
2. **Solanum (Solanaceae)**: Also exhibits a similar inflorescence pattern with solitary flowers and one leaf per node.
3. **China Rose (Hibiscus)**: Does not exhibit the same characteristics; it has a different arrangement of flowers and leaves.

### Step 5: Conclusion
Based on the analysis, the genera that meet the criteria of having one simple leaf at each node and one flower at the tip of each branch of the peduncle are:
- **Mustard (Brassicaceae)**
- **Solanum (Solanaceae)**

### Final Answer
The correct answer is **Mustard (Brassicaceae) and Solanum (Solanaceae)**.

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