All the 'WILD Green-Stuff'
'Lower Plants' - Lichens, Mosses, Clubmosses, Horsetails, Ferns & Algae
A Cup Lichen illustrates this section
Lichens are simple slow-growing plants that typically forms a low crustlike, leaflike, or branching growth on rocks, walls, and trees.
For The Inquisitive:
Lichens are composite plants consisting of a fungus that contains photosynthetic algal cells. Their classification is based upon that of the fungal partner, which in most cases belongs to the subdivision Ascomycotina, and the algal partners are either green algae or cyanobacteria. Lichens obtain their water and nutrients from the atmosphere and can be sensitive indicators of atmospheric pollution.
Vascular plants (from Latin vasculum: duct), also known as tracheophytes (from the equivalent Greek term trachea) and also higher plants, form a large group of plants that are defined as those land plants that have lignified tissues (the xylem) for conducting water and minerals throughout the plant. They also have a specialized non-lignified tissue (the phloem) to conduct products of photosynthesis.