Riccia is classified as an amphibian plant because it can thrive in both aquatic and terrestrial environments. This means that Riccia can live partially submerged in water while also being able to grow in moist soil.

As a member of the bryophytes, Riccia has structures that allow it to absorb water and nutrients directly from its surroundings, similar to other non-vascular plants. Its ability to live in water makes it well-suited for wet habitats, but it can also survive on land in damp conditions.

This dual habitat adaptation is what gives Riccia its classification as an amphibian plant, highlighting its versatility in different environments.