Gemmae are multicellular green structures for vegetative propagation. These are found inside gemma cups in

Options

A. riccia capsule
B. marchantia thallus
C. funaira protonema
D. polytrichum thallus.

Explanation

**Step-by-Step Solution:**

1. **Understanding Gemmae**: Gemmae are multicellular green structures that are involved in vegetative propagation. They are specialized for asexual reproduction.

2. **Identifying Gemma Cups**: Gemmae are found inside structures called gemma cups. These cups are specific to certain plants.

3. **Analyzing the Given Options**:
- **Option 1: Trichia Capsule**: This plant reproduces asexually through fragmentation, not gemmae. Therefore, gemma cups are not present in this plant.
- **Option 2: Marchantia Thallus**: Marchantia is known to reproduce asexually through gemmae, which are located on the dorsal surface of the thallus within gemma cups. This indicates that gemma cups are present in this plant.
- **Option 3: Funaria Protonema**: Funaria reproduces asexually by fragmentation of the primary protonema. Hence, gemma cups are not present in this plant.
- **Option 4: Polytrichum Thallus**: Similar to Funaria, Polytrichum reproduces through fragmentation of the secondary protonema. Therefore, gemma cups are also not present in this plant.

4. **Conclusion**: Based on the analysis, the only plant that has gemma cups containing gemmae is **Marchantia thallus**.

**Final Answer**: The correct option is **Marchantia thallus**.

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