Trees

Trees with needles; pines and firs (select needles per bunch)
Needles single
Tree of high desert; pine	Single-leaf pinyon
Tree of higher mountains; fir
Needles 4-sided	Red fir
Needles flat	White fir
Two needles per cluster; subalpine	Lodgepole pine
Three needles per cluster; montane	Jeffrey pine
Five needles per cluster
Bark gray; needles 1-2 inches long	Whitebark pine
Bark reddish; needles 3/4 to 1 inch long; crowded	Foxtail pine
Trees with broad leaves
Leaves lobed; fruit an acorn	California black oak
Leaves with sharp teeth on margin	Water birch
Leaves with fine teeth or none
Leaves round; flutter in the wind	Quaking aspen
Leaves triangular shape	Black cottonwood
Leaves elongate (lanceolate)	Willow