Non-vascular plants are plants without a vascular system consisting of xylem and phloem. ... Bryophytes, an informal group that is now treated as three separate land plant Divisions, namely Bryophyta (mosses), Marchantiophyta (liverworts), and Anthocerotophyta (hornworts).

Bryophytes not contain xylem &phloem(non vascular cryptogames).And it is known as amphibians of plant kingdom.

Bryophytes are non-vascular cryptogams. This means that they are a type of plant that lacks specialized vascular tissues for the transport of water and nutrients. They are considered to be the earliest land plants and are typically found in moist environments.

Non-vascular Plants
Bryophytes, including mosses, liverworts, and hornworts, are non-vascular plants. Unlike vascular plants, they do not have true roots, stems, or leaves. Instead, they have simple structures called rhizoids that anchor them to the ground and absorb water and nutrients. Without specialized tissues for conducting water and nutrients, bryophytes must rely on diffusion and osmosis to transport these substances within their cells.

Life Cycle of Bryophytes
Bryophytes have a life cycle that involves alternating generations between a gametophyte and a sporophyte phase. The gametophyte is the dominant phase and produces gametes through mitosis. The male gametes (sperm) are produced in antheridia, while the female gametes (eggs) are produced in archegonia. Fertilization occurs when sperm swim through a film of water to reach the eggs.

After fertilization, the zygote develops into a sporophyte, which is attached to and dependent on the gametophyte. The sporophyte produces spores through meiosis, which are then released into the environment. These spores germinate and develop into new gametophytes, thus completing the life cycle of bryophytes.

Importance of Bryophytes
Bryophytes play significant roles in ecosystems. They help to stabilize soil and prevent erosion, as their rhizoids hold the soil particles together. They also contribute to nutrient cycling and provide habitats for small organisms. Additionally, bryophytes are used in horticulture, as they can be grown as decorative plants in gardens and terrariums.

In conclusion, bryophytes are non-vascular cryptogams and represent the earliest land plants. They lack specialized vascular tissues and have a unique life cycle with alternating generations of gametophytes and sporophytes. Despite their simple structure, bryophytes play important ecological roles and have practical uses in horticulture.