Marcgravia sp., commonly known as "small round" or "round-leaved Marcgravia," is a tropical plant native to Central and South America. 

Care tips include:

- Light: Prefers bright, indirect light but can tolerate lower light conditions.

- Water: Keep the soil consistently moist but avoid waterlogging. Allow the top inch of the soil to dry out between waterings.

- Humidity: Thrives in high humidity; consider misting or placing a humidity tray nearby.

- Temperature: Ideal temperatures range from 65°F to 80°F (18°C to 27°C).

- Soil: Use a well-draining potting mix, ideally one that retains some moisture.

- Fertilization: Feed with a balanced liquid fertilizer every 4-6 weeks during the growing season. 

Overall, Marcgravia sp. is a relatively low-maintenance plant that can add a unique touch to your indoor plant collection.