Cryptocoryne spiralis Cryptocoryne spiralis is a common plant in India, where it grows even in rice fields. It is the first described Cryptocoryne (1830). C. spiralis is regarded as the most "primitive", having a septum closing the kettle. This feature is not seen in any other Cryptocoryne, but is common in the related genus Lagenandra. Even though this plant is still very rare, it is expected that it will eventually find a wide distribution within aquarists. They grow without any problems in medium-hard tap water, within a weak acid to slightly alkaline environment at a temperature of 23 to 27 degrees C. A nutrient-rich substrate with loam and peat added is recommended, and should be at least 5-7 cm thick. It is best planted in groups. A gorgeous, easy to propagate by runners plant.