Something about the painting made Tianyi Yu pause. The artwork, depicting tropical plants crowded together in a riot of color, had been painted in 1876 by prolific botanical illustrator Marianne North. The wealthy Victorian woman had traveled the world, usually on her own, documenting in bold oils the plants and landscapes she saw. During a trip to Borneo, North had filled this canvas with plants from a particular spot in the forests of the island’s northwest corner. The viewer’s eye might be drawn to oblong yellow fruits from one plant,…