Under such conditions, its growth form changes so that the internodes lengthen and the leaves become longer and narrower.

[2] The plant body is green, soft and upright, about half an inch tall.

The main axis of the plant, which is upright, bears a set of spirally arranged, sessile leaves having a clearly distinguishable midrib.

At the apex of the main plant axis, the antheridium is borne.

A lateral branch from the main plant axis bears the female shoot archegonium at its meristem.