In catkin inflorescence, the flowers are

Options

A. unisexual and sessile
B. unisexual and pedicellate
C. bisexual and sessile
D. bisexual and pedicellate

Answer

**Step-by-Step Solution:**

1. **Understanding Catkin Inflorescence:**
- Catkin inflorescence is a type of flowering arrangement that falls under the category of racemose inflorescence. This means that the flowers are arranged along a central stem or axis.

2. **Characteristics of Catkin:**
- In a catkin, the flowers are typically borne on a pendulous (hanging) spike that emerges from the leaf axis. This means that the flowers hang downwards.

3. **Type of Flowers:**
- The flowers in catkin inflorescence are unisexual. This means that the flowers are either male or female, but not both.

4. **Absence of Stipules:**
- In catkin inflorescence, the flowers do not have stipules. Stipules are small leaf-like structures that can be found at the base of the leaf stalk in some plants. Their absence is a characteristic feature of catkin flowers.

5. **Nature of Flowers:**
- The flowers in catkin inflorescence are sessile, meaning they do not have a stalk (pedicel) and are directly attached to the main stem.

6. **Examples of Plants with Catkin Inflorescence:**
- Common examples of plants that exhibit catkin inflorescence include birch (Betula), oak (Quercus), and willow (Salix).

7. **Conclusion:**
- Therefore, in catkin inflorescence, the flowers are unisexual and sessile.

**Final Answer:**
In catkin inflorescence, the flowers are unisexual and sessile.

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