From 2010 Blog - You say Formosa, I say Mimosa. When I was growing up people called this a Formosa tree. The name was incorrect, it is actually a Mimosa tree . Once very common in southern gardens, today it is pretty much disdained as an invasive species or weed tree. This is a wild one located along a ditch bank near my house. The tree is still quite beautiful and this bloom was backlit by a small dapple of afternoon sunlight. Canon, 7D, 1/160 sec @ f/13.0, ISO 400, 100 mm macro.