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.

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

Stephen Dalton / Maple (Acer sp) leaves in autumn

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

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

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...

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

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

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

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

Scott Leslie / Red Maple (Acer rubrum) trees and river, Mersey River, Medway Lakes Wilderness Area, Nova Scotia, Canada

Jeff Foott / Maple (Acer sp) leaves and needles in autumn, Acadia National Park, Maine

Kevin Schafer / Pine (Pinus sp) and Japanese Maple (Acer palmatum) trees in autumn, Ginkakuji Gardens, Kyoto, Japan

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

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

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

Pascal Tordeux / Maple (Acer sp) under mamatus clouds and the beginnings of a thunderstorm. Picardy, France. June 2000

Colin Varndell / Norway maple (Acer platanoides) leaf in spring. Dorset, UK April

Colin Varndell / Field maple (Acer campestre) ripening in autumn. Dorset, UK October

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.

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.

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

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

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

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

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

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

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

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