Botanica absentia is a memorial to extinct tree species, set seventy years in the future after climate change has forced most living organisms into either mutation or extinction.  Along with a replica limb from the now-extinct Cercis canadensis, redbud tree, stretching overhead, an archive wall of stainless-steel tags commemorates 72 extinct tree species out of the thousands lost; opposite hangs an image of the last, living redbud tree.  My installation is an attempt to communicate that at this present moment, we are at the tipping point of a world gone wrong.