The Jardin des Plantes is a botanical collection that has been kept and studied on the same ground for four hundred years. Five long rectangular beds run 480 metres between double rows of plane trees, with a bronze statue of a naturalist at each end. Gardeners replant them twice a year, in November and in May, so there is colour from late winter into October. Away from that avenue the planting follows science rather than display: the school of botany arranges its beds by plant family, so walking them takes you through the classification in order.
Louis XIII ordered a royal garden of medicinal plants here in 1626, so that doctors in training would learn which plants healed, and it opened to the public in 1640. Buffon ran it for forty-nine years and extended it towards the Seine. Lamarck argued here that species change over time; Cuvier, a professor at the same institution, rejected that idea and proved from fossil bones that whole species can vanish. The garden is still the main site of the national natural history museum, and the alpine garden shuts from November to March.