Dark-purple-eyed sunflower. Helianthus atrorubens. Illustration by John Curtis (the entomologist), engraved by Weddell. Handcolored copperplate engraving from Samuel Curtis's "The Curtis Botanical Magazine" 1826.. Samuel Curtis, cousin and son-in-law to William Curtis, took over the Botanical Magazine in 1826. Samuel re-named it "The Curtis Botanical Magazine" and enlisted the help of William Jackson Hooker, Professor of Botany at Glasgow University. Samuel Curtis' daughters drew the illustrations for the magazine.