Taxiphyllum, Taxiphyllum alternans, Vesicularia montagnei
Christmas Moss is as mysterious as some of the other mosses in the aquarium hobby. There is no consensus on its geographic origins and even the scientific name has a tendency to change. Its growth habits and appearance are just as varied. When grown attached to a piece of driftwood or rock, it forms triangular fronds in the shape of Christmas trees (hence the common name). If allowed to grow free floating, it tends to have a much less organized appearance and the triangular fronds are much less pronounced. In this form, it is often confused for the much more common Java Moss.
1 portion is sold = about 1 tablespoon