What are the characteristics of Equisetum (horsetails)? Why it is also called scouring rushes ?

Explanation

### Step-by-Step Text Solution

**Step 1: Introduction to Equisetum (Horsetails)**
Equisetum, commonly known as horsetails, is a genus of plants that are characterized by their unique morphology and structure. They are considered primitive vascular plants and belong to the family Equisetaceae.

**Step 2: Characteristics of Equisetum**
1. **Lack of Leaves**: Horsetails do not have true leaves. Instead, they have small, scale-like structures that are often mistaken for leaves.
2. **Photosynthesis**: The stems and branches of horsetails are green and perform photosynthesis, compensating for the absence of leaves.
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