An American landscape has been created in front of the British Museum. The project, the work of the Royal Botanic Gardens, Kew, features rare plants from the differing climates of the US. They include sweet grass (Hierchloe odorata) - used as incense because of its vanilla scent - and the orange coneflower (Rudbeckia fulgida), a prairie wildflower. The North American Landscape will remain until November 25.