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 plants are not really grasses. Many of the common names for species make use of the term arrowgrass, although there are exceptions: T. procera, for example, is commonly known as water ribbons.
- Triglochin alcockiae - Australia
- Triglochin barrelieri
- Triglochin maritima
- Triglochin palustris
- Triglochin procera - Australia
- Triglochin striata - Australia