Credit to !funkajunk@lemmy.world for sharing this neat guide in Science Memes - Broccoli Blooms

https://en.wikipedia.org/wiki/Brassica_oleracea

It has been bred into a wide range of cultivars, including cabbage, broccoli, cauliflower, brussels sprouts, collards, and kale, some of which are hardly recognizable as being members of the same genus, let alone species.