Sagittaria platyphylla Directory References Discover How Did Helen Keller Fly a Plane? 9 Noteworthy Bog Bodies (And What They Tell Us) 7 Vestigial Features of the Human Body 7 of History's Most Notorious Serial Killers 26 Decade-Defining Events in U.S. History Timeline of the 1980s All 119 References in “We Didn’t Start the Fire,” Explained Contents Sagittaria platyphylla plant Learn about this topic in these articles:arrowhead plants In arrowheadsagittifolia and S. platyphylla, and have naturalized in many streams, ponds, and agricultural waterways. Read More