Odd scpal is anterior in family Papilionaceae.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Family Papilionaceae**:
- The family Papilionaceae, also known as Fabaceae, includes a variety of flowering plants, commonly referred to as legumes.

2. **Identifying the Odd Sepal**:
- In the context of this family, the term "odd sepal" refers to the unique arrangement of the sepals in the flower structure. Specifically, one sepal is different from the others in terms of position or shape.

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