John Shaw / Hybrid Poplar tree plantation in autumn (Populs sp.). Boardman Tree Farm, near Irrigon, Oregon, USA. October.

Jeff Foott / Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah

Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Bentonite Hills, Capitol Reef National Park, Utah

Andres M. Dominguez / Hawthorn berries (Crataegus monogyna) in Poplar woodland (Populus) Sierra de Grazalema Natural Park, southern Spain. October.

Pascal Tordeux / Avenue of Poplar (Populus sp) trees in fog, Villers Le Sec, Aisne, Picardy, France, December.

Pascal Tordeux,Pascal Tordeux / Two rows of Poplar (Populus sp.) trees reflected in in flood water, during the floods of the River Oise, Picardy, France, January 2008

Pascal Tordeux / A row of Poplar trees (Populus sp) with Mistletoe (Viscum sp) silhouetted in winter at sunset, Picardy, France, January

Jack Dykinga / Bark patterns of Aspen tree (Populus tremula) in front of a Ponderosa pine (Pinus ponderosa) trunk, Kaibab National Forest, Arizona, USA

Jean E. Roche / Aerial view of vineyards and fruit trees edged with Italian poplar trees, introduced to the Camargue during the 19th century and planted for protection against the wind, near Arles, Camargue, Southern...

Jean E. Roche / Aerial view of fruit trees covered with nets and poplar trees planted to protect them against the wind, Camargue, Southern France, May 2009

Daniel Heuclin / Rio Grande Cottonwood tree (Populus fremonti wislizenii) on a sand "pedestal" White Sands National Park. New-Mexico, USA, August 2009

Floris van Breugel / Autumn colours of Aspen tree (Populus tremula) Sierra Nevada, California, USA. September 2009