Dennerle Cryptocoryne usteriana In-VitroCryptocoryne usteriana is an impressive plant from the Philippines. Unlike many other Cryptocoryne species, it grows permanently under water and is therefore not suitable for emersed cultivation in the greenhouse. For this reason it is very rarely found commercially. The bullate leaves are up to 70 cm long and the leaves are bright mid green with a reddish underside. With medium lighting, Cryptocoryne usteriana grows best in hard, alkaline water and