In which of the following plants is a tricarpellary syncarpous gynoecium found ?

Options

A. Onion
B. Solanum
C. Pea
D. Mustard

Answer

To determine which plant has a tricarpellary syncarpous gynoecium, we can follow these steps:

### Step 1: Understand the Terms
- **Gynoecium**: The female reproductive part of a flower, consisting of one or more carpels.
- **Carpels**: The individual units of the gynoecium; they can be united (syncarpous) or separate (apocarpous).
- **Tricarpellary**: Refers to a gynoecium that has three carpels.
- **Syncarpous**: Refers to a gynoecium where the carpels are fused together.

### Step 2: Identify the Types of Gynoecium
- Gynoeciums can be classified based on the number of carpels:
- Monocarpellary: One carpel
- Bicarpellary: Two carpels
- Tricarpellary: Three carpels
- Multi-carpillary: More than three carpels

### Step 3: Analyze the Given Options
- We need to evaluate the options provided in the question to identify which plant has a tricarpellary syncarpous gynoecium.
- The options include plants from various families.

### Step 4: Evaluate Each Option
1. **Onion (Allium)**: Belongs to the family Liliaceae. It has a tricarpellary syncarpous gynoecium.
2. **Solanum**: Belongs to the Solanaceae family. It has a bicarpellary gynoecium.
3. **Pea (Pisum sativum)**: Also does not have a tricarpellary syncarpous gynoecium; it has a bicarpellary structure.
4. **Mustard (Brassica)**: Similar to pea, it does not exhibit a tricarpellary syncarpous gynoecium.

### Step 5: Conclusion
- Based on the analysis, the only plant that has a tricarpellary syncarpous gynoecium is **Onion (Allium)**.

### Final Answer
**Onion (Allium) has a tricarpellary syncarpous gynoecium.**

---