In article , Kay Easton
writes
But there are two points there - firstly the same common name may be
applied to plants of different families - like gillyflower, for example

Secondly, although in many cases closely related plants share similar
growth preferences this may not always be true, where, for example, they
have come to occupy different habitats, and secondly, similarity of
growth preference does not imply close relationship. So removal of plant
from a particular family would not mean that you had to alter its
position in crop rotations - unless, of course, generations of gardeners
had got it wrong!

Yes, these are good points which hopefully would be considered by those
undertaking the task of re-classification.
--
Alan & Joan Gould - North Lincs.