Set at a future point in time, the installation Botanica absentia, using multicolored reflections of light, aluminum and holographic vinyl, is both a dark memorial and a tribute to the lost tree species of earth after climate change has caused devastation to the point where most species of plants and animals, including humans, have either become extinct or mutated into other forms in order to survive. Trees are one of the casualties. Opens September 6 at 7pm. through December 29. Education gallery, Teen Museum Studies program.