One of my Lophophora williamsii bloomed today, and after taking a few pics, I used a fine paintbrush to collect pollen from the anthers. To my surprise, the filaments responded to the disturbance and curled inwards quite rapidly (like Drosera tentacles). I have never read, nor can I find sources referring to this behaviour anywhere
Am I just being a total cactus noob, or do quite a few species do this?
PS. I live in the UK so no, I'm not doing anything illegal by cultivating this species.