Kew Gardens in south-west London is celebrating another Guinness World Record title, as it now houses the largest living plant collection on Earth. Here, botanical horticulturalist Will Spoelstra tends to the gardens’ oldest plant, a prickly cycad (Encephalartos altensteinii) brought from South Africa in 1775. All photos: PA
Giant water lilies Victoria Amazonica, the world's largest.
Alberto Trinco with an upturned leaf of a giant water lily at the Royal Botanic Gardens, Kew.
Alberto Trinco measures the titan arum, which holds the Guinness World Record as the world's tallest bloom.
Kew Gardens' Nepenthes truncataas, the longest Nepenthes plant trap in the world.