Fissidens fontanus is a delicate feathery dark green aquatic moss clinging to driftwood or rocks with its rhizoids, forming roundish cushions or lawn-like populations. It is also known under the synonym Octodiceras fontanum and in the trade as “Fissidens geppii”. We cultivate two variants of this species, which differ in size when growing in the same environment. The smaller variant is what we call “Phoenix moss”. It develops around 3 to 5 mm long leaflets, is of a somewhat darker green and has an overall more delicate growth habit and looks more compact as it branches more readily than the larger variant.