Steve Downer / Timelapse of Sycamore tree (Acer pseudoplatanus) leaves developing, UK. March. Controlled conditions.

Nick Upton / Sycamore tree (Acer pseudoplatanus) flowers, Wiltshire, UK, May.

Nick Upton / Sycamore tree (Acer pseudoplatanus) flowers, Wiltshire, UK, May.

Matthew Maran / Sycamore (Acer pseudoplatanus) veteran tree, Devon, UK, July.

Graham Eaton / Hadrian's Wall at Sycamore Gap, between Steel Rigg and Housesteads, Northumberland, England, UK, March 2017.

Graham Eaton / Sycamore (Acer pseudoplatanus) in Sycamore Gap, Hadrian's Wall. The wall is constructed on The Whin Sill, a layer of hard intrusive, volcanic Dolerite. Between Steel Rigg and Houseteads, Northumberlan...

Sylvain Cordier / Sycamore (Acer pseudoplatanus) seeds, Alsace, France

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

Nick Upton / Sycamore tree (Acer pseudoplatanus) flowers, Wiltshire, UK, May.

Ann & Steve Toon / Sycamore (Acer pseudoplatanus) gap, Hadrian's Wall, Northumberland, UK, August

Ann & Steve Toon / Sycamore (Acer pseudoplatanus) gap, Hadrian's Wall, Northumberland, UK, August

MYN / Niall Benvie / Emerging Sycamore leaves (Acer pseudoplatanus) Scotland, UK, May.