Here's an oddity. Although it was labelled as 西兰花 (xī lán huā), which is 'broccoli', it looks like no broccoli I've ever seen before. Even the checkout girl asked me what the heck it was. I'm guessing it might be some variant or hybrid. I'll cook it later and see if it tastes of broccoli.
EDITED: to note I've found it. It is Broccoli Romanesco - 罗马花椰菜 (luó mǎ huā yé cà) or 宝塔花菜 (bǎo tǎ huā cài) - literally, 'pagoda cauliflower'.