Cactus / horizonthalonius

Yesterday was a hot day. The maximum temperature in my greenhouse reached to almost 50 'C.
An Echinocactus horizonthalonius was in flower.
Since just one plant was in flower, I collected pollen and kept in fridge for the pollination.
Echinocactus horizonthalonius is one of my favorite species.
I hope this one would be a Blue Barrel years later.