Stomatium alboroseum first flower

I'm still editing the photos from the succulent market and will try to post a report this weekend. But for now I need to share my joy over the Stomatium alboroseum seedling with you. This little guy is 11 months old and has only 6 leaves but it already could develop and open its very first flower! I'm very proud of it.
Funny thing, even though the flower opens at night and seemingly doesn't rely on sunlight for that, it opened just a little bit over the last few days when it was raining the whole time. Today it was sunny and hot and as soon as it was dark the flower opened fully. As if it got charged by the sun during the day to have enough energy to open at night :)

My Stomatium trifarium kids are several months older and really huge but not even a sign of a flower there.
Thanks for your comment