Wow theyre small! In fact, theyre the worlds smallest flowering plant! How small are they? Well Step 1) FInd an o on this page. Step 2) Imagine two specks inside that o. Two adult Wolffias could fit inside of that o! Also, if you looked back in 30-36 hours, there might be four of them! They reproduce really fast. One more thing: they dont even have leaves or stems. So theyre being discovered just about everywhere now that scientists know what they exactly are. If youve been to a pond or a river theres a decent chance youve encountered them. Find an in depth article about them here.