Jeff Vanuga / Volkswagon driving through Jedediah Smith Redwoods State Park, California, USA, May, Model released

Floris van Breugel / A winter blanket of snow covers Giant Redwood trees (Sequoia sempervirens) Sequoia and King's Canyon National Park, California. December 2008.

Floris van Breugel / Morning sun rays breaking through the tree trunks, of Redwood National Park, California, USA. June 2008.

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

Floris van Breugel / Dogwood (Cornus nuttallii) in bloom amongst Giant Sequoia trees (Sequoiadendron giganteum) and two Mule deer (Odocoileus hemionus), Sequoia and King's Canyon National Parks, USA. June. Veolia Environn...

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

Tim Fitzharris / Giant Sequoia (Sequoiadendron giganteum) trees, California

Adrian Davies / Dawn redwood (Metasequoia glyptostroboides) Botanic Garden, Surrey, England, UK, October 2010

Daniel Heuclin / Giant Sequoia (Sequoiadendron giganteum) trunk rising into a blue sky. Sequoia National Park, California, USA, August.

Floris van Breugel / A grove of Giant Redwood trees (Sequoia sempervirens) after snow storm. Sequoia and King's Canyon National Park, California. December 2008.

Aflo / N-3603 View up to canopy of of Sequoia Redwoods, USA.

Aflo / N-4702 Sunlight and mist in Sequoia woodland, California, USA.

Aflo / N-3504 to canopy of Sequoia redwood trees, California, USA.

Aflo / N-3602 of sunlight through Sequoia Redwood, USA.

Aflo / N-0601 Redwood forest, Oregon, USA (Sequoia sempervirens)

Aflo / N-0604 Fresh shoots at base of trunk of Redwood tree (Sequoia sempervirens) Redwood NP, California, USA.

Neil Lucas / Camera equipment on pulley for filming Giant sequoia tree (Sequoiadendron giganteum) for BC Life series, California USA, October 2007

Neil Lucas / Giant sequoia tree trunks (Sequoiadendron giganteum) with sprinkling of snow, California, USA, October 2007

Thomas Lazar / Irregular black burn scorch mark on reddish bark of Giant sequoia tree (Sequoiadendron giganteum) Yosemite National Park, California, USA, June 2008

Thomas Lazar / Charred / burnt thick bark at base of Giant redwood tree (Sequoia sempervirens) in coastal redwood forest, Redwoods National and State Parks, Northern California, USA, May 2008

Kevin Schafer / Fog in Redwood National Park, California

Stephen Belcher / Coast Redwood (Sequoia sempervirens) trees, Rotorua, New Zealand

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees in snow and fog, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) tree after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees after first snow, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees in snow and fog, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) trees in snow and fog, Sequoia National Park, California

Yva Momatiuk & John Eastcott / Giant Sequoia (Sequoiadendron giganteum) after first snow, Sequoia National Park, California

Bruno D'Amicis / Hagenia / African redwood (Hagenia abyssinica) flowering tree, Endemic to Afromontane regions, Kaffa zone, Southern Ethiopia, East Africa December 2008

Tim Laman / Giant Coast Redwood tree (Sequoia sempervirens) canopy. Jedediah Smith Redwoods State Park. Jedediah Smith Redwoods State Park, California. Nov 2002.

Tim Laman / Researcher Jim Spickler with a Wandering salamander (Aneides vagrans) in a Giant coast redwood tree (Sequoia sempervirens). Prarie Creek Redwood State Park, California. Nov 2002.

Tim Laman / Researcher, Jim Spickler, with a Wandering salamander (Aneides vagrans) in a Giant coast redwood tree (Sequoia sempervirens). Prarie Creek Redwood State Park, California. Nov 2002.

Tim Laman / Researcher, Steve Sillett, up at 340 feet in the canopy of Giant Coast Redwood tree (Sequoia sempervirens) forest at Bull Creek Flats. Humboldt Redwoods State Park, California. Nov 2002.

Tim Laman / 'Del Norte Giant', the largest (by mass) Giant Coast Redwood tree (Sequoia sempervirens) in the world. Jedediah Smith Redwoods State Park, California. Nov 2002.

Tim Laman / A researcher exploring the canopy of the Giant Coast Redwood tree (Sequoia sempervirens) forest. The tree has been named 'Sacajawea'. Jedediah Smith Redwoods State Park, California. Nov 2008.

Tim Laman / A researcher exploring the canopy of the Giant Coast Redwood tree (Sequoia sempervirens) forest. The tree has been named 'Sacajawea'. Jedediah Smith Redwoods State Park, California. Nov 2008.

Thomas Lazar / Deep red trunks of mature Giant sequoia trees (Sequoiadendron giganteum) surrounded by smaller green pines, General Grant Grove, Kings Canyon National Park, California, USA

Thomas Lazar / Trunks of Giant Sequoia trees (Sequoiadendron giganteum) with smaller trees behind, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Towering trunk of Giant Sequoia tree (Sequoiadendron giganteum) in fog, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Towering trunks of Giant Sequoia tree (Sequoiadendron giganteum) in fog, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Trunks of Giant Sequoia trees (Sequoiadendron giganteum) with smaller trees behind, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Trunks of Giant Sequoia trees (Sequoiadendron giganteum) with smaller trees behind, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Towering trunk of Giant Sequoia tree (Sequoiadendron giganteum) in fog, Western Slope Sierra Nevada Mnts, Sequoia National Park, California, USA

Thomas Lazar / Looking up the trunk of Giant Sequoia tree(Sequoiadendron giganteum) Western Slope Sierra Nevada Mnts, Kings Canyon National Park, California, USA. Did you know? Sequoias were named after Sequoyah, th...

Tim Fitzharris / Coast Redwood (Sequoia sempervirens) trees, Mariposa Grove, Yosemite National Park, California

Nature Production / Giant Sequoia trees {Sequoiadendron giganteum} 2000-2500 years old, 500m in height, Sequoia National Park, California, USA

Jack Dykinga / A large group of Broad-leaf Lupines (Lupinus latifolious) on a foggy hillside with Oregon White Oaks (Quercus garryana) in distance, Bald Hills, Redwood National Park, California

Jack Dykinga / A large group of Broad-leaf Lupines (Lupinus latifolious) on a foggy hillside with Oregon White Oaks (Quercus garryana) in distance, Bald Hills, Redwood National Park, California

Jack Dykinga / A large group of Broad-leaf Lupines (Lupinus latifolious) on a foggy hillside with Oregon White Oaks (Quercus garryana) in the distance, Bald Hills, Redwood National Park, California

Jack Dykinga / Coastline of Redwood National Park at sunset, California

Jack Dykinga / Coastline of Redwood National Park at sunset, California

Michael Hutchinson / Gap in trunk created by fire in Coastal Giant redwood tree {Sequoia sempervirens} Humboldt Redwoods State Park, California, USA

Michael Hutchinson / Gap in trunk created by fire in Coastal Giant redwood tree {Sequoia sempervirens} Humboldt Redwoods State Park, California, USA

Jack Dykinga / Timber from felled old growth Redwood trees, Arcata Redwood Company Mill, Redwood National Park, California, USA

Michael Hutchinson / Redwood sorrel {Oxalis oregana} flowering on forest floor beneath Coast Giant redwood trees {Sequoia sempervirens} Humboldt State Park, California, USA

Michael Hutchinson / Coast Trillium {Trillium ovatum} flowering on forest floor beneath Coast Giant redwood trees {Sequoia sempervirens} Lady Bird Johnson Grove, California, USA

Michael Hutchinson / Redwood sorrel {Oxalis oregana} on forest floor beneath Coast Giant redwood trees {Sequoia sempervirens} Humboldt State Park, California, USA

Michael Hutchinson / Redwood sorrel {Oxalis oregana} and ferns on forest floor of Coast Giant redwood trees {Sequoia sempervirens} Humboldt State Park, California, USA

Michael Hutchinson / Coast Giant redwood trees {Sequoia sempervirens} Sorrel and ferns, Humboldt State Park, 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 / Old growth forest with Coast Giant redwood trees {Sequoia sempervirens}, lichen, moss and ferns, Redwood NP, California, USA.

Michael Hutchinson / Coast Giant redwood trees {Sequoia sempervirens} and ferns in Redwood NP, California, USA.

Michael Hutchinson / Coast Giant redwood trees {Sequoia sempervirens} and ferns in Redwood NP, California, USA. Log and root ball of one fallen tree.

Michael Hutchinson / View along the fallen log of a Coast Giant redwood trees {Sequoia sempervirens} Redwood NP, California, USA. Tallest trees in the world.

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} with Redwood sorrel {Oxalis oregana} Avenue of the Giants, Humboldt Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} in fog, trees get their water from the fog, Redwood NP, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} Avenue of the Giants, Humboldt Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood tree {Sequoia sempervirens} which has sprouted a second trunk, Redwood NP, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} in fog, trees get their water from the fog, Redwood NP, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} and ferns, Avenue of the Giants, Humboldt Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} in fog, trees get their water from the fog, Redwood NP, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} with moss covered branches in foreground, Prairie Creek Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} in fog, trees get their water from the fog, Redwood NP, 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

Michael Hutchinson / Coastal Giant Redwood trees {Sequoia sempervirens} California, USA

Michael Hutchinson / Coastal Giant Redwood tree trunks bark study{Sequoia sempervirens} Prairie Creek Redwoods State Park, California, USA

Michael Hutchinson / Coastal Giant Redwood forest {Sequoia sempervirens} with moss covered twigs in foreground, Prairie Creek Redwoods State Park, California, USA

David Welling / Giant Redwood (Sequoia sempervirens) forest, Priairie Creek Redwoods SP, California, USA

Philippe Clement / Close up of bark of Dawn redwood tree {Metasequoia glyptostroboides}, native to China

Philippe Clement / Dawn redwood leaves and bark {Metasequoia glyptostroboides}, native to China

Philippe Clement / Looking up at Dawn redwood trees {Metasequoia glyptostroboides} Belgium, native to China

Tim Fitzharris / Giant Sequoia (Sequoiadendron giganteum) trees, some with mossy trunks, in Grant Grove, Sequoia National Park, California

Tim Fitzharris / Coast Redwood (Sequoia sempervirens) trunk and Pacific Rhododendron (Rhododendron macrophyllum), Del Norte Coast Redwoods State Park, Redwood National Park, California