Stamens are tetradynamous in family Cruciferae.

Explanation

### Step-by-Step Solution:

1. **Understanding the Term 'Tetradynamous':**
- The term 'tetradynamous' refers to a specific arrangement of stamens in certain flowering plants. In this arrangement, there are six stamens in total, with four being longer and two being shorter.

2. **Identifying the Family:**
- The family in question is Cruciferae, also known as the Brassicaceae family. This family includes plants such as mustard, cabbage, and radish.

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