I have been waiting on this little cactus for weeks now, trying to catch it in full bloom. The first two blooms opened partway but I never caught them fully open. I was beginning to think this second round of blooms would elude me too, but yesterday, for a short time, they almost made it. If you look closely you will see that the stamens remain coiled up- if they came open too I missed it. I snapped these pictures and the next time I checked an hour or so later they were already on their way to closing back up. This is a Gymnocalycium stenopleurum.