1	"Nuts 1--3, +- angled, enclosed by spiny, bur-like involucre"	Chrysolepis
1	"Nuts 1, not angled, partly enclosed by scaly, cup-like involucre"	2
2	"Cup-like involucre with reflexed to spreading scales; staminate inflorescence a stiff spike, spreading to erect"	Notholithocarpus
2	"Cup-like involucre with appressed scales; staminate inflorescence a catkin, pendent"	Quercus