While we were looking for porcelain berry near the boardwalk, we found a bunch of these strange-looking plants. We had never seen anything like them. It turns out that they are Jimson Weed; a poisonous (according to Phillip Cho, the University Landscape Architect) plant in the nightshade family. Jimson Weed also turns out to be from Mexico. It may or may not be invasive, depending on who you ask. Sure is interesting though!