| Most basal Eudicots are dimerous or trimerous, with only occasionally pentamerous types which represent homoplasious trends. |
| A very minute joint at the base of the claw-joint, in most tetramerous and Trimerous beetles. |
| So in fuchsias, a very common deviation consists in a trimerous and rarely a dimerous symmetry of the flower. |
| Some non-terminal flowers are dimerous, but otherwise identical to trimerous flowers. |
| Flowers in Cyperoideae usually have a trimerous superior pistil consisting of a trigonous, unilocular ovary, a long single style and three stigmatic branches. |
| Basal lineages are trimerous with differentiated sepals and petals. |
