The inflorescence supporting stem is called

Options

A. peduncle
B. thalamus
C. helicoid cyme
D. verticillaster

Answer

**Step-by-Step Solution:**

1. **Understanding Inflorescence**: Inflorescence refers to the arrangement of flowers on a floral axis. It is important to know that inflorescences can be categorized into different types, such as cymos and racemos.

2. **Identifying the Options**: The question provides four options:
- A) Peduncle
- B) Thalamus
- C) Helicoid sign
- D) Verticillaster

3. **Analyzing Each Option**:
- **Peduncle**: This is the stem that supports the inflorescence. It is the main stalk from which the flowers emerge.
- **Thalamus**: Also known as the receptacle, it is the thickened part of the stem where the flower organs grow. However, it does not specifically refer to the supporting stem of the entire inflorescence.
- **Helicoid Sign**: This is a type of inflorescence where flowers are arranged on one side of the axis. It does not refer to the supporting stem.
- **Verticillaster**: This is another type of inflorescence characterized by a whorled arrangement of flowers. It does not refer to the supporting stem either.

4. **Conclusion**: After analyzing all the options, the only term that correctly describes the inflorescence supporting stem is **Peduncle**. Therefore, the correct answer is option A) Peduncle.

**Final Answer**: The inflorescence supporting stem is called **Peduncle**.

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