1) Genus triglochin 2) Liliopsid genus 3) Monocot genus 
Triglochin is a genus in the family Juncaginaceae containing around 18 species. North America has four (or five) species, two of which can also be found in Europe: Triglochin palustris (marsh arrowgrass) and Triglochin maritima (sea arrowgrass). Australia has many more. The most widely used common name for the genus is arrowgrass, although these p...
[n] - perennial or annual bog or marsh plants
genus Triglochin noun perennial or annual bog or marsh plants; includes arrow grass