Floral formula fails to indicate

Options

A. epiphylly and epipetaly
B. floral symmetry
C. cohesion ofstamens and carpels
D. aestivaton and placentation

Answer

**Step-by-Step Solution:**

1. **Understanding Floral Formula**: A floral formula is a shorthand representation of the structure of a flower. It provides information about the symmetry, gender, and arrangement of floral parts (like sepals, petals, stamens, and carpels).

2. **Analyzing the Options**:
- **Option A: Epiphyly and Epipetaly**: These terms refer to the arrangement of floral parts. Epiphyly means the presence of leaves or bracts at the base of the flower, and epipetaly refers to stamens that are attached to the petals. These can be indicated in a floral formula.

- **Option B: Floral Symmetry**: This indicates whether a flower is actinomorphic (radially symmetrical) or zygomorphic (bilaterally symmetrical). This is clearly represented in the floral formula.

- **Option C: Cohesion of Stamens and Carpels**: This refers to whether the stamens or carpels are fused together. This can also be indicated in the floral formula using brackets.

- **Option D: Estimation and Placentation**: Estimation refers to the arrangement of petals (corolla) and placentation refers to the arrangement of ovules within the ovary. These aspects are not represented in the floral formula.

3. **Conclusion**: Since floral formulas do not provide information about the arrangement of ovules in the ovary (placentation) or the arrangement of petals (estimation), the correct answer is **Option D**.

**Final Answer**: Option D - Estimation and Placentation.

---