Examples of dicotyledons
One factor that immediately identifies the sunflower as a dicot is the web-like pattern formed by its leaf veins.
Again, web-like veins in the leaves shows the common dandelion to be dicot.
Horse chestnut tree (conker tree)
The horse chestnut (the conker tree) is a dicot – it has two cotyledons (embryonic leaves) in its seed (the “conker”), and the leaf veins form a web pattern.