Delonix regia
It is not as closely related to typical boletes as was previously thought. The genus "Phlebopus" is a member of the suborder "Sclerodermatineae", which makes it more closely related to earth balls than to typical boletes. Within this suborder, "Phlebopus" makes up the family Boletinellaceae with "Boletinellus". "Boletus brevitubus", described from "Cephalocitrus grandis" and "Delonix regia" forests of Yunnan, China in 1991, was placed into synonymy with "Phlebopus marginatus" in 2009.