Often found in ponds and rivers, Sagittaria is a genus of some 20 species.  Popular species include Sagittaria subulata, Sagittaria latifolia, and Sagittaria platyphylla.

LIVE AQUARIUM PLANT SAGITTARIA SUBULATA ONE BUNCH OF 10 US $4.99 End Date: Friday Mar-12-2010 21:57:55 PST Add to watch list

Sagittaria subulata-dwarf sagittaria-full aquatic plant US $3.50 End Date: Monday Apr-05-2010 21:33:03 PDT Add to watch list

Also referred to as “Arrowhead” plants, Sagittaria look great planted midground in bunches.  These make an excellent beginner plant.