This is all up to the taxonomists to decide and history shows that taxonomical changes are cyclical - the lumpers rule for a while and then the splitters rule for a while, and then the lumpers again and.. back and forth.
I sort of suspect that the creators of The Plant List (which by the way came out in 2010) would vehemently disagree their interpretations are "out of date".
http://www.theplantlist.org/ab...
Anyway, no problem.
