thallophyte
/ˈθæləfaɪt/
noun
- A plant that has a simple body without true roots, stems, or leaves, such as algae, fungi, and lichens.
- Lichens, which are thallophytes, can grow on bare rock.
- The pond was covered with thallophytes like green algae.
- Mushrooms are thallophytes because they lack roots and leaves.