Bryophytes (from the Greek words bruon, moss and phytos, plant), or moss, form a phylum in the Plant Kingdom. The plants in this phylum are land-based, characterised by the absence of a vascular system.
They do not, therefore, have roots, but instead have structures called rhizoids that anchor the plant to the substrate. Rhizoids can also absorb water, but the entire structure of a bryophyte is also capable of absorbing water.
A sporangium containing the spores of a bryophyte in a small capsule on the end of the awn. © TheOtherJohnC CC by