I googled this fern and was interested to see it is related to the Australian nardoo and looks similar although nardoo has four leaves on each stalk. The nardoo fern is freely available at nurseries. I have one planted in my pond and it has taken over. It is very attractive and vigorous in south-east Queensland. > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/