Pascal Tordeux / Lone Maple (Acer) in a field against cumulo-nimbus and mammatus clouds. Picardy, France, May.

Marie Read / Red Maple (Acer rubrum) leaves covered with early snow in autumn. Ithaca, New York, USA, October.

Marie Read / Red Maple (Acer rubrum) leaves covered with early snow in autumn. Ithaca, New York, USA, October.

Stephen Dalton / Maple (Acer sp) leaves in autumn

Colin Varndell / Close up of Field maple buds (Acer campestre) Dorset, England, UK February

Laurie Campbell / Norway Maple (Acer platanoides) fallen leaves in autumn, Queen Elizabeth Forest Park, Stirlingshire, Scotland, October

Merryn Thomas / Maple leaves (Acer sp), UK. October 2009.

Jack Dykinga / Yucca (Yucca schottii) plants growing amongst Bigtooth maple trees (Acer saccharum grandidentatum) in autumn, Huachuca Mountains, Coronado National Forest, Arizona, USA

Jack Dykinga / Yucca (Yucca schottii) plants growing amongst Bigtooth maple trees (Acer grandidentatum) in autumn, Huachuca Mountains, Coronado National Forest, Arizona, USA

Jack Dykinga / Leaves of Arizona sycamore (Platanus Wrightii) and Bigtooth maple (Acer saccharum grandidentatum) floating on water, South Fork Cave Creek, Coronado National Forest, Chiricahua Wilderness, Chiricahua...

Guy Edwardes / Close up of decaying Sycamore leaf (Acer pseudoplatanus) Devon, England, November 2008

Wild Wonders of Europe / Biancarelli / Sycamore (Acer pseudoplatanus) leaves over Gradinsko Lake, Upper lakes, Plitvice Lakes NP Croatia, October 2008

Philippe Clement / Silver / Creek / River maple (Acer saccharinum) leaf in autumn colours, native to eastern North America

Simon Colmer / Field maple tree (Acer campestre) twig and buds in winter, UK

Ross Hoddinott / Field maple leaf {Acer campestre} frozen in ice, Cornwall, UK. October

Jack Dykinga / Blue Hen Falls with Sugar Maples (Acer saccharum) and American Beech trees (Fagus grandifolia), Cuyahoga Valley National Park, Ohio

Tim Fitzharris / Little Pigeon River cascading among rocks and colorful Maple leaves, Great Smoky Mountains National Park, Tennessee

Martin Gabriel / Sycamore tree in blossom {Acer pseudoplatanus} Bavaria Germany

Jack Dykinga / Autumnal Bigtooth Maples (Acer saccharum grandidentatum), West Fork Oak Creek, Coconino National Forest, Arizona

Jack Dykinga / Red and Yellow coloured Bigtooth Maples (Acer saccharum grandidentatum) in Autumn, West Fork Oak Creek, Coconino National Forest, Arizona

Jim Brandenburg / Maple (Acer sp) leaf in pond, Minnesota

George Sanker / Red Maple Tree (Acer rubrum) in autumn colours. Baxter State Park, Maine, September.

Colin Varndell / Norway Maple (Acer platanoides) buds breaking in spring. Dorset, UK, April 2012.

Alex Hyde / Sycamore (Acer pseudoplatanus) seed coated in hoar frost. Peak District National Park, UK. December.

Ernie Janes / Fallen autumn leaves of Sycamore (Acer pseudoplatanus) Norfolk, UK, November

Adrian Davies / Seed of a Sycamore (Acer pseudoplatanus) tree falling in autumn. Long exposure

Doug Wechsler / Close-up of a Sugar maple leaf (Acer saccharinum), Pennsylvania, USA, October.

Wild Wonders of Europe / Bartocha / Maple tree (Acer sp.) Crovul Valley Gorge, Arges County, Leota mountain range, Carpathian Mountains, Romania, July

Wild Wonders of Europe / Bartocha / Maple tree (Acer sp.) Crovul Valley Gorge, Arges County, Leota mountain range, Carpathian Mountains, Romania, July

Wild Wonders of Europe / Bartocha / Maple tree (Acer sp.) Crovul Valley Gorge, Arges County, Leota mountain range, Carpathian Mountains, Romania, July

Floris van Breugel / Moss-covered Vine maples (Acer circinatum) in the Hoh River Rainforest of Olympic National Park, Washington, USA, May.

Floris van Breugel / Moss-covered Vine maples (Acer circinatum) and Big leaf maples (Acer macrophyllum) in the Hoh River Rainforest of Olympic National Park, Washington, USA, May.

Floris van Breugel / Maple tree covered with moss and lichen in drizzly fog along the Hoh River in Olympic National Park, Washington, February.

Colin Varndell / Newly opened sycamore leaves in spring. Dorset, UK April 2012

Colin Varndell / Field maple (Acer campestre) twig with buds in mid winter, Dorset, UK January

Scott Leslie / Sugar Maple (Acer saccharum) seedling growing beneath old-growth Canadian Hemlock (Tsuga canadensis), Nova Scotia, Canada

Sandra Bartocha / Maple (Acer sp.) flowers and unfurling leaves, Mecklenburg-Vorpommern, Germany, April

Ben Lascelles / Autumn / fall colours of maple (Acer sp) trees, Hardwood lookout trail, Algonquin Provincial Park, Ontario, Canada. Oct 2009

Ben Lascelles / Autumn / fall colours of the maple (Acer sp). trees, Hardwood lookout trail, Algonquin Provincial Park, Ontario, Canada. Oct 2009

Ben Lascelles / Autumn / fall colours of maple (Acer sp) trees, Hardwood lookout trail, Algonquin Provincial Park, Ontario, Canada. October 2009

Peter Cairns / 2020VISION / Decaying sycamore leaf. Scotland, October.

Guy Edwardes / 2020VISION / Sycamore (Acer pseudoplatanas) leaf unfurling in spring. New Forest, Hampshire, England, UK, March.

Guy Edwardes / 2020VISION / Sycamore (Acer pseudoplatanas) leaf unfurling in spring. New Forest, Hampshire, England, UK, March. Did you know? The sycamore tree was introduced to Britain in the 15th or 16th century.

Guy Edwardes / 2020VISION / Sycamore (Acer pseudoplatanas) leaf unfurling in spring. New Forest, Hampshire, England, UK, April.

Guy Edwardes / 2020VISION / Sycamore (Acer pseudoplatanus) leaf unfurling in spring. New Forest, Hampshire, England, UK, April.

Guy Edwardes / 2020VISION / Sycamore (Acer pseudoplatanus) leaf unfurling in spring. New Forest, Hampshire, England, UK, April.

Colin Varndell / Norway maple tree (Acer platanoides) bud breaking, Dorset, UK, March

Ross Hoddinott / Sycamore leaves (Acer pseudoplatanus) close up with freshly emerged leaves, view looking upwards, Broxwater, Cornwall, UK, April.

Adrian Davies / Purple Toothwort (Lathraea clandestina) growing on (Acer saccharinum) England, March.

Rob Cousins / Group of Japanese maple trees (Acer palmatum dissectum) showing autumn colour, Old Arboretum, Westonbirt Arboretum, Gloucestershire, UK, October

Rob Cousins / Maple (Acer sp) leaves in autumn, Westonbirt Arboretum, Gloucestershire, UK, October

Laurie Campbell / Norway maple (Acer platanoides) buds and flowers opening, Berwickshire, Scotland, May

Hiroya Minakuchi / Japanese Maple (Acer palmatum) trees in fall colors, Tenryu-ji Temple, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) forest in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) forest in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) leaves in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) leaves in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) trees in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) trees in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) trees in fall colors, Kyoto, Japan

Adrian Davies / Japanese maple (Acer palmatum) tree with autumnal foliage, UK, October

Adrian Davies / Japanese maple (Acer palmatum) dissectum cultivar with autumnal leaves, UK, October

Philippe Clement / Traditional tea house along pond and Smooth Japanese maples (Acer palmatum) showing leaves in colourful red and orange autumn colours at Japanese garden in Hasselt, Belgium October 2011

Ann & Steve Toon / Field maple (Acer campestre) leaves photographed on white background in autumn, UK.

Gary K. Smith / Sycamore tree (Acer pseudoplatanus) leaves suffering from tar spot fungus (Rhytisma acerinum) UK, August

Martin Gabriel / Box Elder / Maple Ash (Acer negundo) closeup of flowers. Bavaria, Germany, April.

Matthias Breiter / Sugar Maple (Acer saccharum) seed pods, Spruce Woods Provincial Park, Manitoba, Canada

David Woodfall / Sycamore (Acer pseudoplatanus) leaves unfurling in spring. Wales, UK, April.

David Woodfall / Sycamore (Acer pseudoplatanus) leaves unfurling in spring. Wales, UK, April.

Scott Leslie / Red Maple (Acer rubrum) in autumn foliage reflected in Mersey River, Kejimkujik National Park, Nova Scotia, Canada

Scott Leslie / Red Maple (Acer rubrum) in autumn foliage, Annapolis Valley, Nova Scotia, Canada

Ernie Janes / Sycamore (Acer pseudoplatanus) new leaves opening from bud, UK, April

Ernie Janes / Sycamore (Acer pseudoplatanus) new leaves opening from bud, UK, April

MYN / Niall Benvie / Norway maple leaf (Acer platanoides) on white background, France, November meetyourneighbours.net project

Rolf Nussbaumer / Bigtooth Maple (Acer saccharum grandidentatum) shifting into autumn colours. Lost Maples State Park, Hill Country, Central Texas, USA, November.

Ernie Janes / Fallen leaves of Field maple tree (Acer campestre)UK

Yva Momatiuk & John Eastcott / Maple (Acer sp) and Cottonwood (Populus sp) trees in fall colors, Zion National Park, Utah

Marie Read / Pattern of green yellow, and red Maple (Acer sp.)leaves in autumn, North Chagrin Reservation, Ohio, USA, October.

Nature Production / Maple (Acer sp) fallen leaf on frozen branch, Japan

Nature Production / Japanese Red Maple (Acer pycnanthum) autumn leaves on white background, Japan

Colin Varndell / Sycamore blossom (Acer pseudoplatanus) in spring, Dorset, UK, May

Nick Upton / Sycamore (Acer pseudoplatanus) and Hop hornbeam (Ostrya carpinifolia) trees and waterfalls fringing Milanovac lake, Plitvice Lakes National Park, Croatia, July 2010.

Nick Upton / Sycamore (Acer pseudoplatanus) and Hop hornbeam (Ostrya carpinifolia) trees and waterfalls fringing Milanovac lake, Plitvice Lakes National Park, Croatia, July 2010.

Nick Upton / Sycamore trees (Acer pseudoplatanus) and waterfalls fringe Milanovac lake, Plitvice Lakes National Park, Croatia, July 2010.

Nick Upton / Sycamore (Acer pseudoplatanus) and other trees overhang waterfalls with travertine limestone forming as calcium laden water tumbles down moss covered rocks at Plitvice Lakes National Park, Croatia, Ju...

Ross Hoddinott / Maple (Acer sp.) leaves showing red and gold autumn colours. Westonbirt Arboretum, Gloucestershire, UK, October

LYNN M. STONE / Sugar Maple Leaves (Acer saccharum) in water, Connecticut, USA

Doug Wechsler / Old growth Sugar maple (Acer saccharim) trees, Nova Scotia, Canada, August

Nick Upton / Norwegian maple tree (Acer platanoides) flowers, Gloucestershire, UK, April.

Colin Varndell / Field maple (Field maple) close-up of bud bursting Dorset, UK April

Floris van Breugel / A lone Maple leaf (Acer) accents the sandy forms created by flow separation after autumn rains, Zion National Park, Utah, USA

Floris van Breugel / Maple trees (Acer) under a thick coating of the abundant mosses. In summer this climate is so moist the biomass density competes with that of true rainforests. Olympic National Park, Washington, USA,...

Scott Leslie / Golden-crowned Kinglet (Regulus satrapa) in red maple, Nova Scotia, Canada

Scott Leslie / Golden-crowned Kinglet (Regulus satrapa) calling in red maple, Nova Scotia, Canada

Scott Leslie / Black-capped Chickadee (Poecile atricapillus) in fall red maple tree, Nova Scotia, Canada