Floris van Breugel / Trunks of Californian Redwood trees (Sequoia sempervirens) and blooming Rhododendron, Redwood National Park, Califorina, USA, June 2008.

Neil Lucas / Giant sequoia trees (Sequoiadendron giganteum) on the edge of lake, with reflections, California, USA, October 2007

Neil Lucas / Giant sequoia trees (Sequoiadendron giganteum) on edge of lake, with reflections, California, USA, October 2007

Kirkendall-Spring / Sunbeams through Coastal Redwood trees (Sequoia sempervirens), Muir Woods NP, California, USA

Michael Hutchinson / Coast Giant redwood trees {Sequoia sempervirens} in the fog, Del Norte State Park, California, USA. Tallest trees in the world.

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} with Redwood sorrel {Oxalis oregana} and ferns, Humboldt Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} with moss covered fallen trunk in foreground, Avenue of the Giants, Humboldt Redwoods State Park, California, USA

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) forest, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) trees with recent dusting of snow, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) trees with dusting of snow, King's Canyon National Park, California

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum) and star trails in King's Canyon National Park, California

Jeff Foott / Giant Sequoia (Sequoiadendron giganteum) tree, Mariposa Grove, Yosemite National Park, California