Identify the basic criteria for classifying cryptogams.

Explanation

### Step-by-Step Solution

1. **Definition of Cryptogams**:
- Cryptogams are non-flowering plants. This means they do not produce flowers as part of their reproductive cycle.

2. **Understanding Seed Coats**:
- The classification of plants often involves examining their reproductive structures. In the case of Cryptogams, the seed coat is a crucial factor.
- If a seed is enclosed in a fruit, it indicates that the plant is a flowering plant (angiosperm).
...