Variation in the length of filaments of stamens occur in the actinomorphic flower of

Options

A. Ocimum
B. Mustard (Brassica)
C. Pisum
D. Capsicum

Answer

To solve the question regarding the variation in the length of filaments of stamens in actinomorphic flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Actinomorphic Flowers**:
- Actinomorphic flowers are those that exhibit radial symmetry, meaning they can be divided into two identical halves in multiple planes. This characteristic is essential for identifying the type of flower we are discussing.

**Hint**: Remember that actinomorphic flowers can be symmetrical in multiple ways.

2. **Identifying the Stamen**:
- The stamen is the male reproductive organ of a flower, consisting of two parts: the anther (where pollen is produced) and the filament (the stalk that supports the anther). The question specifically asks about the variation in the length of the filaments.

**Hint**: Focus on the structure of the stamen and its components.

3. **Analyzing the Options**:
- We need to evaluate the provided options to see which flower exhibits variation in the length of its stamens:
- **Osemum**: Has a uniform stamen length of 1mm.
- **Mustard**: Exhibits a tetradynamous arrangement, with 6 stamens (4 long and 2 short), indicating variation in filament length.
- **Peasum**: All stamens are equal in length (1.5mm).
- **Capsicum**: All stamens are equal in length (2mm).

**Hint**: Look for differences in filament lengths among the options.

4. **Conclusion**:
- The only flower among the options that shows variation in the length of its filaments is **Mustard**, due to its tetradynamous stamen arrangement.

**Hint**: Identify the unique characteristics of each flower to determine the correct answer.

### Final Answer:
The correct answer is **Mustard**.