1. Mosses: These small, soft plants often form dense mats in damp, shady environments. They lack true roots, stems, and leaves, and instead absorb water and nutrients directly from their surroundings.

2. Liverworts: These plants have flattened, leaf-like structures and are often found in moist, shady areas. Like mosses, they lack vascular tissue and rely on diffusion for water and nutrient transport.

3. Hornworts: These small, often inconspicuous plants are named for their horn-shaped sporophytes. Like mosses and liverworts, they lack vascular tissue and depend on their surroundings for water and nutrients.