Attend a reception this Saturday, May 5, from 1 – 3 at the Hunnewell Building Lecture Hall at the Arnold Arboretum, in honor of the opening of a new art show, A Natural Curiosity: A Retrospective of Images by Gordon Morrison. From Newcomb’s Wildflower Guide to The Curious Naturalist magazine, from the Garden in the Woods in Framingham to the Missouri Botanical Gardens tropical rainforest exhibit, Gordon Morrison has been reflecting and illuminating the natural world for over four decades. This retrospective focuses largely on his botanical work, highlighting the best of the thousands of illustrations he has done for education and conservation organizations. The show will run through July 1, and there will be an artist’s talk on Wednesday, June 27, from 7 – 8:30 pm.