Although they all have similar names, and look similar too, they’re not all in the same family. Broccoli and broccolini are in the same family as cabbage, but the closest relative to broccoli rabe is actually turnip. Visually, broccoli rabe has longer, thinner stalks than broccoli and its florets aren’t as dense. It has leaves like a mustard green or kale and also, sometimes, has pretty, tiny, yellow edible flowers. Broccolini looks more similar to broccoli rabe than broccoli, but it’s actually a hybrid between broccoli and Chinese broccoli, and doesn’t have leaves like broccoli rabe.