This Cryptocoryne from Sri Lanka used (mistakenly) to be called Cryptocoryne nevillii, but this is the name of a species that has never been used in aquariums. Like many other Cryptocorynes, not much happens the first month after planting. But then it starts to grow, and willingly produces plenty of runners which form a compact group. The plant becomes 7-20 cm tall, and each roset 7-15 cm wide. 

Pots are brimming with plants and have lots of mass and healthy,
well-developed roots.
Most pots can be divided into several portions or individual plants which are planted separately.