To confuse things even more, we also have: Oxalis massoniana and Oxalis massonorum which I gather are valid names honoring Francis Masson. These are two completely different plants. Can someone please explain this one? There may be a clue in Graham Duncan's article on O. massoniana in Curtis's, April 2009, but I don't have access to it. --Roy NW of Boston 2.5" of rain yesterday, ending the drought (for a while)