in a compound umbel,each umbellule is subtended by

Options

A. involurce
B. involucel
C. bract
D. bracteole

Answer

To answer the question "In a compound umbel, each umbellule is subtended by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Compound Umbel**:
- A compound umbel is a type of inflorescence where the main axis is branched, and each branch (called an umbellule) bears flowers.

**Hint**: Remember that a compound umbel consists of smaller units called umbellules.

2. **Identifying the Parts**:
- In a compound umbel, each umbellule is supported by structures that help in its arrangement and protection.

**Hint**: Think about the protective structures that are typically found at the base of flowers in inflorescences.

3. **Recognizing the Subtending Structures**:
- The structures that subtend each umbellule in a compound umbel are called involucres.

**Hint**: Involucres are often confused with other floral structures, so focus on their role in supporting the umbellules.

4. **Terminology**:
- The specific term for the involucres in the context of a compound umbel is "involucal bracts." These are leaf-like structures that provide support.

**Hint**: Recall that bracts are modified leaves that can be found in various types of inflorescences.

5. **Final Answer**:
- Therefore, in a compound umbel, each umbellule is subtended by involucal bracts.

### Conclusion:
The correct answer is that in a compound umbel, each umbellule is subtended by **involucal bracts**.

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