Underground modification of stem i.e., bulbs, corm and rhizomes comes under____family.

Answer

To answer the question regarding the underground modifications of stems such as bulbs, corms, and rhizomes, we need to identify the families to which these modifications belong. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding the Modifications**:
- Underground modifications of stems include structures like bulbs, corms, and rhizomes. These modifications serve the purpose of storing food and facilitating the transport of nutrients within the plant.

2. **Identifying Each Type**:
- **Rhizome**: This is a type of underground stem that grows horizontally. An example of a rhizome is ginger.
- **Corm**: This is a swollen underground stem that serves as a storage organ. An example of a corm is the taro plant (Colocasia).
- **Bulb**: This is a short stem with fleshy leaves that store food. An example of a bulb is onion.

3. **Determining the Families**:
- **Rhizome**: The family of ginger (scientific name: Zingiber officinale) is **Zingiberaceae**.
- **Corm**: The family of the taro plant (scientific name: Colocasia gigantea) is **Araceae**.
- **Bulb**: The family of onion (scientific name: Allium cepa) is **Liliaceae**.

4. **Final Answer**:
- Therefore, the underground modifications of stem (bulbs, corms, and rhizomes) belong to the following families:
- **Rhizome**: Zingiberaceae
- **Corm**: Araceae
- **Bulb**: Liliaceae