The natural habitat is basically a wide stream within what seemed to me as a secondary forest, which previously possibly was a very old rubber plantation. As it had been raining regularly in Pulau Singkep over the pass few days, the water level was quite high and all the cryptocorynes were fully submersed.
We collected a few specimens for photo-taking. The leaves of there cryptocorynes were quite large and green in colour, nothing spectacular. We had not been able to locate any blooming spathes so far to determine accurately the species of this cryptocoryne. Maybe C. cf. longicauda?