Adventitious Roots:
Adventitious roots are roots that develop from plant parts other than the radicle, which is the primary root that emerges from the seed during germination. These roots can arise from various parts of the plant, such as stems, leaves, or even old roots.

Types of Adventitious Roots:
There are several types of adventitious roots, including:
- Aerial roots: Roots that develop above the ground, typically for support or absorption of moisture.
- Prop roots: Roots that grow vertically from the stem and provide additional support to the plant.
- Climbing roots: Roots that help climbing plants attach themselves to structures for support.
- Contractile roots: Roots that contract to pull the plant deeper into the soil.
- Parasitic roots: Roots that penetrate another plant to obtain nutrients.

Importance of Adventitious Roots:
Adventitious roots play a crucial role in the survival and growth of plants. They help plants anchor themselves securely in the soil, absorb water and nutrients, and even propagate vegetatively. These roots are especially important for plants growing in challenging environments, such as wetlands or sandy soils.

Examples of Plants with Adventitious Roots:
- Mangroves: These plants have specialized aerial roots called pneumatophores that help them obtain oxygen in waterlogged soils.
- Ivy: Ivy plants develop adventitious roots along their stems to cling to walls and other structures for support.
- Banyan trees: Banyan trees produce aerial roots that grow downwards to form additional trunks, providing stability to the massive tree.

In conclusion, adventitious roots are a fascinating adaptation that allows plants to thrive in diverse environments by developing roots from unconventional plant parts.