The Ecology of Peat Moss (Sphagnum)
An intact peat moss plant is partly alive and partly dead.
Its top part is alive; growth occurs exclusively at the plant's apex.
The bottom part of the plant has died from lack of light, and is already partially decayed.
This unusual feature can be explained by the fact that peat mosses have neither roots nor a true vascular system; nutrition of the living part of the plant is independent of its dead bottom section.