Short answers, pulled from the story.
A bryophyte is a terrestrial plant that lacks vascular tissue and includes mosses, liverworts, and hornworts. These organisms have no true roots, stems, or leaves to transport water and nutrients over long distances. They rely on a direct relationship with their immediate environment to survive by absorbing moisture and nutrients directly through their surfaces.
The term bryophyte was first suggested by the botanist Braun in 1864. Wilhelm Schimper formalized the classification to include all three major groups of non-vascular land plants in 1879. This classification covers mosses, liverworts, and hornworts as distinct lineages of plants.
Bryophytes require a thin layer of water on the surface of the plant to enable the movement of flagellated sperm from the antheridia to the archegonia. Unlike seed plants, they use water to transport sperm to the egg rather than pollen. Some species are monoicous with organs on the same gametophyte, while others are dioicous with organs on separate plants.
Scientists in Canada achieved a feat in 2013 by reviving a 400-year-old bryophyte specimen that had been frozen in a retreating glacier. The moss had lain dormant in the ice for four centuries yet retained the capacity to photosynthesize and grow once thawed in a laboratory setting. This event demonstrated the remarkable resilience of bryophytes to survive for centuries in frozen conditions.
Bryophytes play a critical role in shaping environments by helping to improve water retention and air space within soil. They serve as bioindicators that reveal the health of an ecosystem by indicating the presence of heavy metals, air pollution, and UV-B radiation. Some species produce natural pesticides and antifeedants to protect themselves from being eaten by slugs and mice.
During World War I, Sphagnum moss was widely used to dress wounds because it could absorb large amounts of blood and pus while preventing infection. The antibiotic properties and ability to retain water of Sphagnum moss made it a useful packaging material for vegetables, flowers, and bulbs. However, the moss can harbor Sporothrix schenckii, a fungus that can cause infection.