Cilantro & Coriander : Cilantro
Bolt resistant, organic with great flavor
Similar in appearance to parsley, cilantro is a staple in Mexican, Indian, and Asian cuisines. This bolt-resistant variety produces lush growth. The seeds of the plant can be harvested and are called coriander.Apiaceae Coriandrum sativum
If left alone this insect-pollinated plant will eventually produce seed and may even self-sow. There aren't many varieties, so you probably don't have to worry too much about cross-pollination.
Gather the seed heads as the seeds start to turn brown and leave them to dry in a paper bag in a warm place.