If you want to see garden food phylogeny tree, I made this a few years ago in D3 and NCBI data using ETE3 (in Pyodide)
http://observablehq.com/@thadk/garden
Broccoli and kale are both brassica oleracea and are included under cabbage (another cultivar of the species). It has support for aliases though, so I don't get why it doesn't use that in this case. Broccoli is my archetypal brassica and I always get hung up when it isn't there.
Brassica oleracea is such a fascinating species by the sheer number of unrecognizably different vegetables we've cultivated that all technically remain the exact same species (it's way, way more than you'd think). If you've never looked at the table on wikipedia, please scroll down and take a look!
I've been thinking about how to gamify my hobby site Related How? (https://relatedhow.kodare.com/) for ages. I can't tell if this is a good way to do it, since I am so bad at plants :P
Neat game. I would appreciate if the full tree animation could be turned off, it's not needed for every guess. Maybe just one new sprout could be animated.