“dominant central leader”…………apply that one as you see fit
“co-dominant central leaders”…………….an oligarchy perhaps?
“rootbound”………..could be a good name for a band
“vigor”…………from a specification that required trees to be Florida #1, vigorous, healthy and free of any pests or diseases………a tree was failed once because “the tree lacks vigor”
and last but not least….
“narrow crotch angle”………….of course I’m referring to a Bradford Pear Tree.