Close up of autumnal colours and trunks of aspen trees, Inyo National forest, California, USA.

Close up of autumnal colours and trunks of aspen trees, Inyo National forest, California, USA.

Oak, Autumnal colours of Aspen and Oak leaves in pond near Alpine, Oregon, USA.

Pond with autumn colored leaves of aspen with lodgepole pine cones and needles, Oregon, USA.

Fleabane, Aspen fleabane, Erigeron speciosus, Daisy like flowers with narrow, pale pink petals surrounding yellow centres.

Fleabane, Aspen fleabane, Erigeron speciosus, Butterfly on daisy like flowers with narrow, pale pink petals surrounding yellow centres.

Fleabane, Aspen fleabane, Erigeron speciosus, Daisy like flowers with narrow, pink petals surrounding yellow centres.

Aspen, Populus tremula.

Aspen, Populus tremula.

Aspen, American aspen, Cottonwood, Populus tremuloides.