To which taxonomical category do both Phellodendron and Boltonia belong?
Phellodendron Phellodendron, or cork-tree, is a genus of deciduous trees in the family Rutaceae, native to east and northeast Asia. It has leathery, pinnate leaves and yellow, clumped flowers. The name refers to the thick and corky bark of some (but not all) species in the genus.
Nesogordonia Nesogordonia is a flowering plant genus. Traditionally included in the family Sterculiaceae, it is included in the expanded Malvaceae in the APG and most subsequent systematics. In that clade, it belongs to the subfamily Dombeyoideae. "Nesogordonia" is among the oldest living genera of its subfamily, if not "the" most ancestral one.