Stems
1. **Herbaceous Stem**: These stems are soft, green, and flexible. They are usually found in plants like grass and herbs. Herbaceous stems are capable of performing photosynthesis. 2. **Woody Stem**: Woody stems are hard and rigid. They provide support to the plant and help in transporting water, nutrients, and sugars. Trees and shrubs typically have woody stems. 3. **Underground Stem**: Underground stems grow below the soil surface. Examples include rhizomes, tubers, and bulbs. They store food, help in vegetative propagation, and provide support to the plant. 4. **Aerial Stem**: Aerial stems grow above the ground. They support the leaves, flowers, and fruits of the plant. Examples include runners, stolons, and tendrils. 5. **Specialized Stem**: These stems have unique functions adapted to specific plant needs. Examples include thorns, cladodes, and phylloclades. They serve purposes like protection, water storage, or photosynthesis.