Dear All, Thank you all for the echo on my short contribution! I made a mistake: it is not Oxalis aquatica but Oxalis natans that I meant, I just wrote the name from memory and your reaction made me look up the source I got this name from. It is Martyn Rix' book 'Growing Bulbs' and I quote a passage on Page 3: "Some water plants that grow in seasonal pools have evolved tuberous rhizomes with which to survive the dry season; examples are many tropical waterlilies (Nymphaea) and several Aponogeton species. An interesting group of plants are most highly evolved in South Africa; they are semi-aquatic members of primarily terrestsrial genera which live in vleis, such as Romulea aquatica, Dipidax triquetra, and Oxalis natans, a beautiful but rare and endangered species in which the leaves and flowers float on the surface of the water" Sounds great, doesn't it? So I think confusion with Marsilea which is related to ferns is excluded and Marsilea is available in the trade. Any source of this most desirable plant known? greetings rom Germany, Uli