Elongated peduncle bearing pedicellate flowers continuosly acrropetal order is

Options

A. corymb
B. umbel
C. raceme
D. head

Answer

To solve the question regarding the type of inflorescence characterized by an elongated peduncle bearing pedicellate flowers arranged in an acropetal order, we can analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks for a type of inflorescence that has an elongated peduncle and flowers that are arranged in an acropetal order. Acropetal means that the younger flowers are at the top and the older flowers are at the bottom.

2. **Analyzing the Options**:
- **Option 1: Corium**:
- In corium, the main axis is short, and the lower flowers have longer pedicels compared to the upper ones. This results in flowers being at the same level, which does not fit the acropetal arrangement.
- **Conclusion**: Incorrect.

- **Option 2: Umbel**:
- In an umbel, the main axis is reduced so that all flowers appear to arise from the same point. This structure does not support an acropetal arrangement.
- **Conclusion**: Incorrect.

- **Option 3: Raceme**:
- In a raceme, there is an elongated peduncle, and the flowers are borne on pedicels. The arrangement is acropetal, meaning the younger flowers are at the top and the older ones are at the bottom. This matches the description given in the question.
- **Conclusion**: Correct.

- **Option 4: Head (Capitulum)**:
- In a head or capitulum, the main axis is flattened, and flowers are closely packed on this receptacle. This structure does not exhibit an acropetal arrangement.
- **Conclusion**: Incorrect.

3. **Final Answer**:
Based on the analysis, the correct answer is **Option 3: Raceme**.