Plants that do not have a system of tubes (xylem and phloem) for transporting water and nutrients are called non-vascular plants.

Here are some other common names for non-vascular plants:

* Bryophytes: This is the scientific name for the group of plants that includes mosses, liverworts, and hornworts.

* Lower plants: This term is sometimes used to distinguish non-vascular plants from vascular plants.

Non-vascular plants are typically small and live in moist environments because they rely on diffusion to transport water and nutrients.