Which of the following statements about the Fabaceae family is incorrect ?

Options

A. Ornamental plants such as lupin, petunia and sweet pea are included in this group
B. They have diadelphous stamens and their anthers are dithecous
C. Their sepals may show valvate or imbricate aestivation
D. They have a monocarpellary gynoecium with a superior ovary

Answer

To determine which statement about the Fabaceae family is incorrect, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Identify the Plants Mentioned**:
- The statement mentions three plants: Lupine, Petunia, and Sweet Pea.

2. **Classify Each Plant**:
- **Lupine**: This is indeed a member of the Fabaceae family (legumes).
- **Sweet Pea**: This is also a member of the Fabaceae family.
- **Petunia**: This plant does not belong to the Fabaceae family; it is part of the Solanaceae family.

3. **Evaluate the First Statement**:
- The first statement claims that Lupine, Petunia, and Sweet Pea are included in the Fabaceae family. Since Petunia is incorrectly classified as a member of the Fabaceae family, this statement is incorrect.

4. **Review Other Statements**:
- The second statement mentions that they have didelphous stamens with anthers or diocese. This is a correct characteristic of the Fabaceae family.
- The third statement indicates that their roots are tap roots or dicot, and that the stem can be erect or climbing, which is also correct for many members of this family.
- The fourth statement discusses sepals showing velvet or imbricate estivation, which is another correct characteristic of the Fabaceae family.
- The fifth statement mentions that they have a monocarpillary gynoecium with a superior ovary, which is also correct.

5. **Conclusion**:
- After evaluating all statements, the incorrect statement is the first one, which misclassifies Petunia.

### Final Answer:
The incorrect statement about the Fabaceae family is: "Ornamental plants such as Lupine, Petunia, and Sweet Pea are included in this group."

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