Eleocharis Belem also known as "Japanese Dwarf Hair grass" is probably the shortest hair grass available on the market today. It is a popular foreground plant that grows very short and does not need frequent trimmings.
Staurogyne sp. 'Porto velho'
Echinodorus Tenellus
Hydrocotyle verticillata
Hairgrass Dwarf (Eleocharis Acicularis)
Hemianthus Micranthemoides
Java Moss (Vesicularia Dubyana)
Hemianthus Callitricoides
Marsilea Crenata