The Queen–Plant from The Temple of Flora (1807) by Robert John Thornton. Original from Biodiversity Heritage Library.… Free Image from public domain license 
Imperial crown, Fritillaria imperialis (1596–1610) by Anselmus Boëtius de Boodt. Original from the Rijksmuseum.… Free Image from public domain license 
Bird of paradise illustration from Les liliacées (1805) by Pierre-Joseph Redouté. Original from New York Public… Free Image from public domain license 
Emperor bird-of-paradise, male from Histoire Naturelle des Oiseaux de Paradis et Des Rolliers (1806) by Jacques Barraband… Free Image from public domain license 
Dracaena recina engraved by Benjamin Fawcett (1808-1893) for Shirley Hibberd’s (1825-1890) New and Rare Beautiful… Free Image from public domain license 
