Sagittaria subulata from South America is an ideal, undemanding foreground plant whose short runners form a compact group.
 
Place individual plants 2-4 cm apart. This plant may cause problems because in certain conditions it suddenly grows to a height of 50 cm when it grows older. But if it is then moved into the background it may become low again. In the aquarium, it sometimes sends a long flower stem to the surface, and small white flowers unfold just above the water surface. 
 
Easy and undemanding plant for begginers
Suitable for the foreground
Height varies depending on the conditons ( high light shorter and bushier plant, low light taller and thinner)