Which one is endospermous

Options

A. Cajanus cajan
B. Helianthus annus
C. Ricinus communis
D. Ravenala madagascariensis

Answer

To determine which of the given options is endospermous, we need to understand the distinction between endospermic (albuminous) and non-endospermic (exalbuminous) seeds.

### Step-by-Step Solution:

1. **Understand Seed Types**:
- **Endospermic (Albuminous) Seeds**: These seeds store food in the endosperm. Examples include maize, wheat, and castor.
- **Non-Endospermic (Exalbuminous) Seeds**: These seeds store food in the cotyledons. Examples include gram, pea, and bean.

2. **Analyze the Options**:
- **Option A: Casinus casin** (Pisin P): This is a non-endospermic seed as it stores food in its cotyledons.
- **Option B: Halianthus annus** (Sunflower): This is also a non-endospermic seed, as it does not store food in the endosperm.
- **Option C: Ricinus communis** (Castor): This is an endospermic seed, as it stores food in the endosperm.
- **Option D: Ravenella madagascariensis** (Traveler's Palm): This is another non-endospermic seed.

3. **Conclusion**:
- After analyzing all the options, the only endospermous seed is **Option C: Ricinus communis (Castor)**.

### Final Answer:
The endospermous seed among the options is **Ricinus communis (Castor)**.