| Often they are much like ordinary ray flowers, except that there are two small teeth at the top of the corolla tube, opposite the ligule. |
| To be measured from the ligule to the tip of the flag leaf on the longest stem. |
| Anthoxanthum differs in its habit, ears, scent, sheath and ligule. |
| Many groups have a ligule or small flap of tissue adaxially above each microphyll, or its homologous sporophyll. |
| The smooth ligule, deflexed marginal teeth, and no keel distinguish it from Arrhenatherum. |
| The ligule is a structure peculiar to grasses and it varies very much. |
