Describing a region with a relatively uniform composition of plant species; see also floristic province
There is now such an immense microliterature on hepatics that, beyond a certain point I have given up trying to integrate (and evaluate) every minor paper published—especially narrowly floristic papers.
A floristic province is a geographic area with a relatively uniform composition of plant species. Adjacent floristic provinces do not usually have a sharp boundary, but rather a soft one, a transitional area in which many species from both regions overlap. The region of overlap is called a vegetation tension zone