This makes me think of the song, Istanbul (Not Constantinople), by Jimmy Kennedy and Nat Simon.
Coriander was cilantro
Now it’s coriander, not cilantro
Been a long time gone, cilantro
Why did cilantro get the works?
That’s nobody’s business but the gardeners
Wow, that was really bad. Sorry. Anyways, when I first was looking at planting cilantro for salsa making I was interested to find out that cilantro is the same plant as coriander. The leaves are called cilantro and the seeds, coriander. My little patch of cilantro has become a little patch of coriander as the plants have gone to seed.
If you have your own little patch of cilantro you can let it turn into a patch of coriander at the end of the growing season. It will slowly start to die and you will see little green seeds start to form at the end of branches. Then the plant will dry and turn from green to brown. Once the plant has completely dried out, you can harvest the coriander.
You can pick each seed by hand or you can pick larger clusters and hang them upside down in a paper bag. Shake it and they will fall off the branches and into the bag. I decided to only harvest some of the seeds and hope that the rest will re sprout cilantro next year. They absolutely should, my only hesitancy is if the patch gets taken over by weeds.