Christie Wilcox in The Scientist:
The vine Boquila trifoliolata is a shapeshifter. As it winds its way up trees and other flora in the Chilean rainforest, its leaves change to resemble those of the plants it uses for support or, sometimes, neighbors it isn’t in contact with. It does such a good job of pretending to be other plants that although the vine was first described in the 1800s, its talent for impersonation remained secret until only about a decade ago. In the early 2010s, Ernesto Gianoli, a plant ecologist with the University of La Serena in Chile, realized that what appeared to be a strange-looking stem from a tree was in fact a B. trifoliata vine, the leaves of which perfectly blended in with the tree’s actual leaves. Once he saw that, he spotted the vine mimicking all sorts of plants—more than 20 species so far—by tweaking the size, shape, and color of its leaves.