The transpiring surface of xerophytes is frequently reduced.
The stems of some xerophytes, e.g.
For instance, some xerophytes are dry and hard in structure, whilst others are succulent and fleshy.
Schimper used the term xerophytes to include plants which live in soils which are physiologically dry, and the term hygrophytes those which live in soils which are physiologically wet or damp. Schimper recognized that the two classes are connected by transitional forms, and that it is useless to attempt to give the matter a statistical basis.
Bog Xerophytes live in the peaty soil of fens and moors which are physically wet, but which are said to be physiologically dry.