In pinnately compound leaves

Options

A. leaflets have carillary buds
B. a constriction is present between leaflet and petiole
C. a rachis is absent
D. all leaflets are not joined to a common point

Explanation

### Step-by-Step Solution:

1. **Understanding Pinnately Compound Leaves**:
- Pinnately compound leaves are characterized by leaflets arranged along a central axis known as the rachis. This arrangement gives the leaf a feather-like appearance.

2. **Identifying the Structure**:
- In a pinnately compound leaf, the leaflets are attached to the rachis, which is an extension of the petiole. The leaflets do not originate from a single point but are distributed along the rachis.

3. **Types of Pinnately Compound Leaves**:
- There are various classifications of pinnately compound leaves, including unipinnate, bipinnate, and tripinnate. Each type has a different arrangement of leaflets.

4. **Examining the Options**:
- The question presents several statements about pinnately compound leaves:
- Are there carillary buds on the leaflets?
- Is there a constriction between the leaflet and the petiole?
- Are the leaflets joined at a common point?
- Is the rachis present?

5. **Analyzing Each Statement**:
- **Carillary Buds**: In pinnately compound leaves, buds are typically found on the petiole but not on the leaflets themselves.
- **Constriction**: There is generally a small petiole or stalk connecting each leaflet to the rachis, indicating a constriction.
- **Common Point**: The leaflets are not all joined at a common point; they are arranged laterally along the rachis.
- **Presence of Rachis**: The rachis is indeed present in pinnately compound leaves, which serves as the central axis.

6. **Conclusion**:
- Based on the analysis, the correct answer to the question is that the leaflets are not joined at a common point, and the rachis is present.

### Final Answer:
The correct statement regarding pinnately compound leaves is that the leaflets are not joined at a common point.

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