The leaves usually posses one of the following type of sclereds

Options

A. brachysclereids
B. osteosclereids
C. macrosclereids
D. asteroscelereids

Answer

To solve the question regarding the type of sclerids usually present in leaves, we will analyze each option provided:

### Step-by-Step Solution:

1. **Understanding Sclerids**: Sclerids are a type of sclerenchyma cell that provide structural support to plants. They can be categorized into different types based on their shape and location.

2. **Option A - Brachysclerids**:
- Also known as stone cells, these are characterized by their gritty texture.
- They are commonly found in the flesh of fruits like pears and sapotas, contributing to their grittiness.
- **Conclusion**: Brachysclerids are not typically found in leaves.

3. **Option B - Osteosclerids**:
- Known as prop cells, these are primarily found in the seed coats of various plants.
- They provide structural support to seeds.
- **Conclusion**: Osteosclerids are not present in leaves.

4. **Option C - Macrosclerids**:
- These are also referred to as rod cells and are found in the seed coats of leguminous plants.
- Their role is similar to that of osteosclerids, providing support to seeds.
- **Conclusion**: Macrosclerids are not found in leaves.

5. **Option D - Asterosclerids**:
- Asterosclerids are located in the mesophyll cells of leaves.
- They provide strength to the leaf structure.
- **Conclusion**: Asterosclerids are indeed present in leaves.

6. **Final Answer**: After analyzing all options, the type of sclerids usually present in leaves is **Asterosclerids (Option D)**.