A flower with five unequal petals has largest posterior petal , two lateral slighly small petals and two anterior petals partially fused to form a boat-shaped structure .
Which is not correct for such a flower ?

Options

A. Descending imbricate aestivation
B. Odd sepal anterior
C. Piston mechanism of pollination
D. Many carpels

Answer

To solve the question regarding the flower with five unequal petals, we will analyze the characteristics of the flower and determine which statement is not correct based on the information provided.

### Step-by-Step Solution:

1. **Identify the Flower Structure**:
- The flower has five unequal petals:
- One largest posterior petal (standard or vexillum).
- Two lateral petals (wings).
- Two anterior petals that are partially fused (keel or carina).

2. **Understand the Terms**:
- **Standard (Vexillum)**: The largest petal at the back.
- **Wings**: The two lateral petals that are slightly smaller.
- **Keel (Carina)**: The two anterior petals that are fused, forming a boat-shaped structure.

3. **Estivation and Gynosium**:
- The flower exhibits **diadelphous condition**, which means the stamens are fused in two groups.
- The gynosium is described as **monocarpillary**, meaning it has a single carpel.

4. **Analyze the Options**:
- We need to identify which statement about the flower is incorrect.
- The options likely include statements about the number of carpels, the arrangement of petals, or the type of estivation.

5. **Identify the Incorrect Statement**:
- Since the gynosium is monocarpillary, any statement suggesting multiple carpels would be incorrect.
- Additionally, if there are statements regarding the type of estivation that do not match the description of the flower, those would also be incorrect.

6. **Conclusion**:
- Based on the analysis, the statement that suggests the flower has "many carpels" is incorrect because the flower is monocarpillary.

### Final Answer:
The statement that is not correct for such a flower is the one that suggests it has "many carpels."

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