Bisexual sessile and bracteates flowers developing acropetally in

Options

A. Raceme
B. Panicle
C. Spike
D. Corymb

Answer

To solve the question about bisexual sessile and bracteate flowers developing acropetally, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms:**
- **Bisexual Flowers:** These are flowers that contain both male (stamens) and female (carpels) reproductive structures.
- **Sessile Flowers:** These flowers do not have a stalk (pedicel) and are directly attached to the main stem or peduncle.
- **Bracteate Flowers:** These flowers are associated with bracts, which are modified leaves that can be found at the base of the flower or inflorescence.
- **Acropetal Development:** This refers to the arrangement of flowers or leaves that develop from the base of the inflorescence upwards (towards the apex).

2. **Identify the Inflorescence Types:**
- **Arachne:** This term does not refer to a known type of inflorescence in flowering plants.
- **Pinnacle:** This is not a recognized term in the context of flowering plant morphology.
- **Spike:** In a spike inflorescence, the flowers are sessile and can be bisexual. The flowers develop acropetally, meaning the lower flowers bloom first, followed by the upper ones.
- **Collium:** This term is also not recognized in the context of flowering plant morphology.

3. **Analyze the Options:**
- **Option A (Arachne):** Not applicable.
- **Option B (Pinnacle):** Not applicable.
- **Option C (Spike):** Correct, as it describes an inflorescence with bisexual, sessile flowers that develop acropetally.
- **Option D (Collium):** Not applicable.

4. **Conclusion:**
- The correct answer is **Option C: Spike**, as it fits all the criteria mentioned in the question.

### Final Answer:
The correct answer is **Option C: Spike**.