| Common Name | Scientific Name | Code |
| arrowgrass | Triglochin L. | TRIGL |
| awl-leaf lilaea | Lilaea scilloides (Poir.) Hauman | LISC4 |
| Gaspe Peninsula arrowgrass | Triglochin gaspensis Lieth & D. L?ve | TRGA4 |
| lilaea | Lilaea Bonpl. | LILAE |
| Lilaea scilloides | Lilaea subulata Bonpl. | LISU9 |
| marsh arrowgrass | Triglochin palustris L. | TRPA28 |
| seaside arrowgrass | Triglochin maritima L. | TRMA20 |
| slender arrowgrass | Triglochin concinna Burtt-Davy | TRCO19 |
| three-rib arrowgrass | Triglochin striata Ruiz & Pav?n | TRST16 |
| Triglochin concinna | Triglochin concinna Burtt Davy var. concinna Burtt Davy [superfluous autonym] | TRCOC2 |
| Triglochin concinna | Triglochin concinna Burtt-Davy var. debilis (M.E. Jones) J.T. Howell | TRCOD2 |
| Triglochin concinna | Triglochin concinnum Burtt-Davy var. debile (M.E. Jones) J.T. Howell [orthographic variant] | TRCOD |
| Triglochin concinna | Triglochin concinnum Burtt-Davy [orthographic variant] | TRCO4 |
| Triglochin concinna | Triglochin debile (M.E. Jones) A.& D. L?ve [orthographic variant] | TRDE5 |
| Triglochin concinna | Triglochin debilis (M.E. Jones) A.& D. L?ve | TRDE9 |
| Triglochin gaspensis | Triglochin gaspense Lieth & D. L?ve [orthographic variant] | TRGA3 |
| Triglochin maritima | Triglochin elata Nutt. | TREL14 |
| Triglochin maritima | Triglochin elatum Nutt. [orthographic variant] | TREL8 |
| Triglochin maritima | Triglochin maritima L. var. elata (Nutt.) Gray | TRMAE2 |
| Triglochin maritima | Triglochin maritimum L. var. elatum (Nutt.) Gray [orthographic variant] | TRMAE |
| Triglochin maritima | Triglochin maritimum L. [orthographic variant] | TRMA4 |
| Triglochin palustris | Triglochin palustre L. [orthographic variant] | TRPA6 |
| Triglochin striata | Triglochin striatum Ruiz & Pav?n [orthographic variant] | TRST6 |