What type of primitive plants are characterized by lacking true stems?

Bryophytes are a group of primitive plants that include mosses, liverworts, and hornworts. What distinguishes bryophytes from other plant types is that they do not have true stems, leaves, or roots. Instead, they possess structures that serve similar purposes but are not considered true organs. For example, bryophytes have a simple structure known as a "stolon" that supports their growth, and they absorb water and nutrients directly through their surfaces rather than through specialized root systems.

This lack of true stems is also significant because it reflects their evolutionary adaptation to life in relatively moist environments, where they can thrive despite their structural limitations. Unlike more advanced plants such as angiosperms and gymnosperms, which have vascular systems that allow for more complex growth forms and greater heights, bryophytes remain relatively small and are often found in shaded or damp habitats.