KIRKSVILLE, Mo. (AP) — An approximately 50-year-old agave plant at Truman State University in Kirksville has sent up a stalk so tall that maintenance personnel had to remove panels from the greenhouse ceiling so it wouldn't smash through. Associate biology professor Lisa Hooper says the stalk could grow up to 25 feet before branching out and flowering in the next few weeks. It's the plant's final show before it dies.