Couverture : Flore Palix (photo principale), TOMO/AdobeStock. P3 : Flore Palix. P6: Ningbo Vinon. P8-9 : mtreasure/GettyImages, geshas/AdobeStock, Wayne Hutchinson/Frank Lane Picture Agency/Biosphoto, Steffen Hauser/picture alliance/botanikfoto, Philippe Giraud/Biosphoto, Roger Eritja/Biosphoto, denizunlusu/GettyImages, Alain Kubacsi/Biosphoto, Yann Avril/Biosphoto. P10-13: Wilfried Thomas/CNRS Sorbonne Université. P15-20 : Morgane Le Gall, David Santini, Emmanuel Boitier, NAROPHOTO, Stéphane Couchet. P30-37 : Jean-Michel Groult x 2, Michel Rauch/Biosphoto, Antoni Agelet/Biosphoto, Michel Rauch/Biosphoto x2, Savo Ilic/AdobeStock, Michel Rauch/Biosphoto x2, Jean-Michel Groult x 4, Savo Ilic/AdobeStock, David Tipling/Biosphoto, Frédéric Didillon/Biosphoto, Savo Ilic/AdobeStock, Jean-Michel Groult x 2, Sabine Se/AdobeStock, Stéphane Vitzthum/Biosphoto, Gérard Lacz/Biosphoto, Jean-Michel Groult x 3, Tomek Ciesielski/Flora Press/Biosphoto, Jean-Michel Groult x 2, Friedrich Strauss/Biosphoto, Lamontagne/Biosphoto, Visions Pictures/Biosphoto, Jean-Michel Groult, Dave Bevan/Garden World Images/Biosphoto, Jean-Michel Groult x 2. P48-55 : John Martin/Garden World Images/Biosphoto, Visions Pictures/Biosphoto, Visions Pictures/Biosphoto, Nicolette Wollentin/AdobeStock,…