Stephen Dalton / Tulip tree flower (Liriodendron tulipifera), UK, June

Stephen Dalton / Tulip tree flower (Liriodendron tulipifera), UK, June

Adrian Davies / Tulip tree (Liriodendron tulipifera) leaves in autumn, Botanic garden, Surrey, England, UK, October

Piotr Naskrecki / Tulip Tree (Liriodendron tulipifera) leaves, Estabrook Woods, Massachusetts

Martin Gabriel / Tulip tree (Liriodendron tulipifera), city park of Badenweiler, Black Forest, Germany, May

Philippe Clement / Tulip tree / Tulip poplar / Yellow poplar (Liriodendron tulipifera) leaf in autumn colours, native to eastern North America

Philippe Clement / Parkland in autumn with Beech tree (Fagus sylvatica) and Tulip tree / Yellow poplar (Liriodendron tulipifera) Nobvember, Belgium

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera)

GEORGETTE DOUWMA / Flower of Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

GEORGETTE DOUWMA / Tulip tree / Yellow poplar (Liriodendron tulipifera) The tallest hardwood tree in eastern North America. USA

Ross Hoddinott / Tulip tree leaves {Liriodendron tulipifera} emerging, RHS Rosemoor, Devon. UK

Doug Wechsler / Tulip tree or Tulip poplar {Liriodendron tulipifera} in winter, Philadelphia, USA

Martin Gabriel / Tulip tree (Liriodendron tulipifera), city park of Badenweiler, Black Forest, Germany, May