I bought this Bishops Cap (astrophytum myriostigma) today. When I got it, the flower bud was closed up fairly tight, similar to the google pic, I left it in the car for a couple of hours with the windows cracked, but about 77° in MO. I came back and the flower popped out!! Then after being home for a while, it’s closed back up. I’m trying for find info on this behavior but not having much luck.