1) Freshwater plant 2) Genus callitriche 3) Rosid dicot genus 4) Water starworts 
Callitriche is a genus of largely aquatic plants known as water-starworts. Previously, it was the only genus in the family Callitrichaceae. However, according to the APG II system this family is now included in the Plantaginaceae (plantain family). The family name Callitrichaceae retains its status as nomen conservandum (name to be retained). ==Ph...
[n] - water starworts
genus Callitriche noun water starworts