In the involucre, bracts are free in the members of

Options

A. Umbelliferae
B. Euphorbiaceae
C. Poaceae
D. Cucurbitaceae

Answer

To answer the question regarding which family has free bracts in the involucre, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Bracts**: Bracts are modified leaves that are found just below the flower. They serve as support and can sometimes resemble petals.

2. **Definition of Involucre**: The involucre is a whorl of bracts that surrounds a flower or flower cluster. In some plants, these bracts can be tightly or loosely arranged.

3. **Identifying Free Bracts**: Free bracts refer to bracts that are not tightly attached to each other or to the flower. This loose arrangement allows the flower to be more prominent.

4. **Analyzing Plant Families**:
- **Apiaceae (Umbelliferae)**: In this family, the bracts are known to be free, meaning they are loosely attached. This characteristic is significant for the identification of flowers in this family.
- **Asteraceae (Compositae)**: In this family, the bracts are typically tightly arranged and do not exhibit the free bract characteristic.
- **Cucurbitaceae**: This family, which includes gourds, also does not have the necessity for free bracts; they are generally tightly arranged.

5. **Conclusion**: Based on the analysis, the family that exhibits free bracts in the involucre is **Apiaceae (Umbelliferae)**.

### Final Answer:
In the involucre, bracts are free in the members of **Apiaceae (Umbelliferae)**.

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